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1.0 Application _Part1
Greg Lewicki And Associates 11541 Warrington Court Parker, CO USA 80138 E-Mail:greg(i?lcwicki.biz Phone (303) 346-5196 Fax: (303)-346-6934 November 21, 2008 Fred Jarman Garfield County Building and Planning Department 109 8`1' Street Suite 303 Glenwood Springs, CO 81601 Dear Fred: Enclosed is one copy of the revised Application for Special Use for the Scott Expansion of the Chambers Pit. We have already paid the application fee. Since there were numerous changes as a result of Kathy Eastley's letter of October 22, 2008, all new pages and maps have been provided. The appendices have been greatly expanded to include the newest information on other permits related to the project. Please let me know if this version is sufficient and we will provide the additional copies. Thanks, Fred. cc: Pete Siegmund cc: Bill Bailey Sincerely, Greg Lewicki, P. E. Greg Lewicki and Associates GARFIELD COUNTY Building & Planning Department 108 8th Street, Suite 401 Glenwood Springs, Colorado 81601 Telephone: 970.945.8212 Facsimile: 970.384.3470 www.garfield-county.com SPECIAL USE PERMIT Doc. # GENERAL INFORMATION (Please print legibly) ➢ Name of Property Owner: RNEIZS EOCE Latl ➢ Mailing Address: F'(, Telephone: (1 7.. ) t ,yl,. ➢ City: (} R State: GtiZip Code: ('i6,50 Cell: (q 7d) lb? Y5"4 • E-mail address: ec,t.r) ktv scco 4)L. cult FAX: (VO) (A,6 -..6"(..L6/ Name of Owner's Representative, if any, (Attorney, Planner, Consultant, etc): (6R 't-&-4:67/0' 1k , • Mailing Address: 115'i/ 4)4k .t.ltkZ (J Cir Telephone: (_703) 3w 5/9L City: ,i4eka State:, Zip Code: Cell: ( ) -z2q E-mail address: _ yelp c Ile u3,c2_ 16 : L FAX: (g12i ). y6 6 (l3 )" Description of Special Use Requested: et) T 61(*Arrti- 4'r C437- E,F lOiC E (k)ipte9 lir ✓ 4.04 / . 7 Street Address / General Location of Property: I:= hZ gil.`r OF PI FM jMiY-Ef -r'E_, 1 v, N OF_ -7c) Legal Description: SEE e-ecaasE,A .-AO /Ed:, 4E_ hack/ f* r/ci.c.i ).k) l 4;7 rrrAC- ➢ Assessor's Parcel Number: . J LL _Lc) - (41%) oc7 ➢ Existing Use: ➢ Property Size (in acres) _ °�:_ Zone District: Last Revised 7/1/08 I. APPLICATION SUBMITTAL REQUIREMENTS As a minimum, specifically respond to all the following items below and attach any additional information to be submitted with this application: 1. Please submit, in narrative form, the nature and character of the Special Use requested. Submit plans and supporting information (i.e. letters from responsible agencies). Include specifications for the proposed use including, but not limited to, the hours of operation, the number and type of vehicles accessing the site on a daily, weekly and/or monthly basis, and the size and location of any existing and/or proposed structures that will be used in conjunction with the proposed use, and provisions for electric power service and any other proposed utility improvements. Be specific. 2. If you will be using water or will be treating wastewater in conjunction with the proposed use, please detail the amount of water that would be used and the type of wastewater treatment. If you will be utilizing well water, please attach a copy of the appropriate well permit and any other legal water supply information, including a water allotment contract or an approved water augmentation plan to demonstrate that you have legal and adequate water for the proposed use. 3. Submit a site plan /map drawn to scale that portrays the boundaries of the subject property, all existing and proposed structures on the property, and the County or State roadways within one (1) mile of your property. If you are proposing a new or expanded access onto a County or State roadway, submit a driveway or highway access permit. 4. Submit a vicinity map showing slope / topography of your property, for which a U.S.G.S. 1:24,000 scale quadrangle map will suffice. 5. Submit a copy of the appropriate portion of a Garfield County Assessor's Map showing the subject property and all public and private landowners adjacent to your property (which should be delineated). In addition, submit a list of all property owners, private and public, and their addresses adjacent to or within 200 ft. of the site. This information can be obtained from the County Assessor's Office. You will also need the names (if applicable) of all mineral interest owners of the subject property, identified in the County Clerk and Recorder's records in accordance with §24-65.5-101, et seq. (That information may be found in your title policy under Exceptions to Title). 6. Submit a copy of the deed and a legal description of the subject property. 7. If you are acting as an agent for the property owner, you must attach an acknowledgement from the property owner that you may act in his/her behalf. If the property is owned by a corporate entity (such as an LLC, LLLP, etc.) please submit a copy of a recorded "Statement of Authority" demonstrating that the person signing the application has the authority to act in that capacity for the entity. 8. Submit a statement that specifically responds to each of the following criteria from Section 5.03 of the Zoning Regulations: (1) Utilities adequate to provide water and sanitation service based on accepted engineering standards and approved by the Board of County Commissioners shall either be in place or shall be constructed in conjunction with the proposed use. (2) Street improvements adequate to accommodate traffic volume generated by the proposed use and to provide safe, convenient access to the use shall either be in place or shall be constructed in conjunction with the proposed use; (3) Design of the proposed use is organized to minimize impact on and from adjacent uses of land through installation of screen fences or landscape materials on the periphery of the lot and by location of intensively utilized areas, access points, lighting and signs in such a manner as to protect established neighborhood character; 9. Depending on the type of Special Use Permit requested, you may need to respond to additional review standards in the Garfield County Zoning Resolution Section 5.00 [Supplementary Regulations]. This may include uses such industrial uses [section 5.03.07 & 5.03.08], Accessory Dwelling Units [section 5.03.21], Utility Zine/Utility Substations, etc. Specific sections of the Zoning Resolution which can be located on the Garfield County web site at htto://www.garfield-countv.corn/building and planning/index htm. or information can be obtained from this office 10. A $525.00 Base Fee: Applicant shall sign the "Agreement for Payment" form and provide the fee with the application. 11. Submit 3 copies of this completed application form and all the required submittal materials to the Building and Planning Department. Staff will request additional copies once the Special Use Permit application has been deemed technically complete. II. PROCEDURAL REQUIREMENTS (The following steps outline how the Special Use Permit Application review process works in Garfield County.) 1. Submit this completed application form, base fee, and all supplemental information to the Garfield County Planning Department. It will be received and given to a Staff Planner who will review the application for technical completeness. 2. Once the application is deemed technically complete, the Staff Planner will send you a letter indicating the application is complete. In addition, Staff will also send you a "Public Notice Form(s)" indicating the time and date of your hearing before the Board of County Commissioners. Prior to the public hearing, Staff will provide you with a Staff Memorandum regarding your requested Special Use. (If Staff determines you application to be deficient, a letter will be sent to you indicating that additional information is needed to deem your application complete.) 3. It is solely the Applicant's responsibility to ensure proper noticing occurs regarding the requested Special Use and the public hearing. If proper notice has not occurred, the public hearing will not occur. Notice requirements are as follows: a. Notice by publication, including the name of the applicant, description of the subject lot, a description of the proposed special use and nature of the hearing, and the date, time and place for the hearing shall be given once in a newspaper of general circulation in that portion of the County in which the subject property is located at least thirty (30) but not more than sixty (GO) days prior to the date of such hearing, and proof of publication shall be presented at hearing by the applicant. Notice by mail, containing information as described in the paragraph above, shall be mailed to all owners of record as shown in the County Assessor's Office of lots within two hundred feet (200') of the subject lot and to all owners of mineral interest in the subject property at least thirty (30) but not more than sixty (60) days prior to such hearing time by certified return receipt mail, and receipts shall be presented at the hearing by the applicant. c. The site shall be posted such that the notice is clearly and conspicuously visible from a public right-of-way, with notice signs provided by the Planning Department. The posting must take place at least thirty (30) but not more than sixty (60) days prior to the hearing date and is the sole responsibility of the applicant to post the notice, and ensure that it remains posted until and during the date of the hearing. 4. The Applicant is required to appear before the Board of County Commissioners at the time and date of the public hearing at which time the Board will consider the request. In addition, the Applicant shall provide proof, at the hearing, that proper notice was provided. 5. Once the Board makes a decision regarding the Special Use request, Staff will provide the Applicant with a signed resolution memorializing the action taken by the Board. Following the Board's approval, this office will issue the Special Use Permit to the applicant. If the Board's approval includes specific conditions of approval to be met, this office will not issue the Official Special Use Permit certificate until the applicant has satisfied all conditions of approval. The Special Use Permit approval is not finalized until this office has issued the Official Special Use Permit certificate signed by the Chairman of the Board of County Commissioners. I have read the statements above and have provided the required attached information which is correct and accurate to the best of my knowledge. 64-Eitfr hioAlad"7--j (Signature of Property Owner) (Date) 46E1)7- /41t1,44aeCht7e3A.1 5NN--0- / 46/140 .00 GARFIELD COUNTY BUILDING AND PLANNING DEPARTMENT AGREEMENT FOR PAYMENT FORM (Shall be submitted with application) GARFIELD COUNTY (hereinafter COUNTY) and LSU k C K' bko '))JJTEI CulMi OF AkEsA ucokrry (hereinafter APPLICANT) agree as follows: 1. APPLICANT has submitted to COUNTY an application for IRE SCOTT. 1 (hereinafter, THE PROJECT). 2. APPLICANT understands and agrees that Garfield County Resolution No. 98-09, as amended, establishes a fee schedule for each type of subdivision or land use review applications, and the guidelines for the administration of the fee structure. 3. APPLICANT and COUNTY agree that because of the size, nature or scope of the proposed project, it is not possible at this time to ascertain the full extent of the costs involved in processing the application. APPLICANT agrees to make payment of the Base Fee, established for the PROJECT, and to thereafter permit additional costs to be billed to APPLICANT. APPLICANT agrees to make additional payments upon notification by the COUNTY when they are necessary as costs are incurred. 4. The Base Fee shall be in addition to and exclusive of any cost for publication or cost of consulting service determined necessary by the Board of County Commissioners for the consideration of an application or additional COUNTY staff time or expense not covered by the Base Fee. If actual recorded costs exceed the initial Base Fee, APPLICANT shall pay additional billings to COUNTY to reimburse the COUNTY for the processing of the PROJECT mentioned above. APPLICANT acknowledges that all billing shall be paid prior to the final consideration by the COUNTY of any land use permit, zoning amendment, or subdivision plan. APPLICANT Date: 29-00? Pelf 5/ d Print Name 64/ /ed Mailing Address: 2Z 73/17/pc,-- ," /isy,"d. &dx 3b057 �PQp ✓r.f. Co 3/502 10/2004 Page 4 't iLIIIL Fe 5114/1111 ,Reception#: 760306 12/1812008 02:51:25 Pfd Jean Rlberico 1 of 1 Rec Fee:$6.00 Doc Fee:D.00 GRRFIELD COUNTY CO STATEMENT OF AUTHORITY Pursuant to C.R.S. 538--30-172, the undersigned executes this Statement of Authority on behalf of r' 'd L(' a Co )0 r'CA.C'1rn (corporation, limit -d liability company, general partnership, registered limited liability partnership, registered limited liability limited partnership, limited partnership association, government agency, trust or other), an entity other than an individual, capable of holding title to real property (the "Entity"), and states as follows: The name of the Entity is /lII li err': LA0 L J � . LL. and is formed under the laws of of .{ ) The mailin�g� address for the Entity is Pa 1:YX �ifie , tit7 S The name and/or position of the person authorized to execute instruments conveying, encumbering, or otherwise affecting_title to real property on behalf of the Entity is ��,01 y The limitations upon the authority of the person named above or holding the position described above to bind the Entity are as follows: 1\1; (if no limitations, insert "None") Other matters concerning the manner in which the Entity deals with any interest in real property are: (if no other matter. leave this section blank) .tfa EXECUTED this »f day of `?IGS.,Q.. 2008. Signature : h. z 41. Name (typed or printed : 6; I I al' le_y Title (if any) : f ieC11bot-- illo re STATE OF Le ! ts ) )SS. COUNTY OF (:�Lt (" U 14 ) I"he foregoing instrument was acknowledged before me this 2-11 day of NOYPr 1br'r 2008 by 14i0 / n! )e_ -y/ h 1-P rJj L. 1_12- a COJDCACIL witness my hand and official seal_ My commission expires: My Commission Expires: J 2009 11/08 on behalf of Adjacent Landowners within 200 feet of the Proposed Use Boundary of Scott Pit City of Rifle P.O. Box 1908 Rifle, CO 81650 W.F. Clough P.O. Box 686 Rifle, CO 81650 Umetco Minerals Corp c/o John Nichols CMI 2301 Brazosport Blvd Freeport, TX 77541-3269 State of Colorado Dept of Highways 4201 E Arkansas Ave Denver, CO 80222-3406 Rivers Edge, LLC P.O. Box1556 Rifle, CO 81650 Gypsum Ranch Co, LLC A Colo Limited Liability Company P.O. Box 1220 Carbondale, CO 81623 Parcels: 2177-151-00-050 2177-151-00-051 Parcel: 2177-152-00-003 Parcel: 2177-161-00-013 Parcels: 2177-152-00-052 2177-152-00-008 Parcels: 2177-151-00-054 2177-151-00-007 2177-113-00-451 Parcels: 2177-141-00-121 Parcel Detail Page 1 of 4 Garfield County Assessor/Treasurer Parcel Detail Information Assessor/Treasurer Property Search 1 Assessor Subset Query 1 Assessor Sales Search Clerk & Recorder Reception Search Basic Building Characteristics 1 Tax Information Parcel Detail 1 Value Detail 1 Sales Detail 1 Residential/Coinmercial Improvement Detail Land Detail 1 Photographs. 1 Mill Levy Revenues Detail Tax Area Account Number Parcel Number 2007 Mill Levy 024 R024500 217715100054 45.837 Owner Name and Mailing Address RIVERS EDGE LLC PO BOX 1556 RIFLE, CO 81650 Assessor's Parcel Description (Not to be used as a legal description) SECT,TWN,RNG:15-6-93 SUB:MCLEARNS ORCHARD LANDS LOT:1 - LOT:11 DESC: ALL LYING N OF 1-70 BK:0547 PG:0014 BK:1769 PG:326 RECPT:691621 BK:1735 PG:841 RECPT:684344 BK:1725 PG:424 RECPT:682001 BK:1725 PG:422 RECP'1':682000 BK:1666 PG:5/6 RECPT:669412 BK:1623 PG:282 RECPT:659894 BK:1614 PG:525 RECPT:658072 BK:1529 PG:276 RECPT:638608 BK:0667 PG:0064 BK:0666 PG:0294 BK:0661 PG:0389 BK:0651 PG:0338 Location http://www.garcoact.comlassessor/Parcel.asp?AccountNumber=R024500 8/29/2008 Parcel Detail Page 2 of 4 2008 Property Tax Valuation Information Physical Address: RIFLE Land: Subdivision: MCLEARNS ORCHARD LANDS Improvements: Land Acres: 36.04 Total: 177,290 Land Sq Ft: 0 ARCHITECTURAL STYLE: Section EXTERIOR WALL: Township Range 15 6 93 2008 Property Tax Valuation Information Additional Value Detail Most Recent Sale Sale Date: Sale Price: 8/28/2005 1,100,000 Additional Sales Detail Basic Building Characteristics Number of Residential Buildings: Number of Comm/Ind Buildings: 1 0 1 ! Actual Value Assessed Value Land: 6,980 2,030 Improvements: 170,310 13,560 Total: 177,290 15,590 Additional Value Detail Most Recent Sale Sale Date: Sale Price: 8/28/2005 1,100,000 Additional Sales Detail Basic Building Characteristics Number of Residential Buildings: Number of Comm/Ind Buildings: 1 0 1 ! Residential Building Occurrence 1 Characteristics UNFINISHED BSMT: 2,252 PORCH, ENCLOSED, FINISHED: 100 1 STORY W/ BASEMENT: 2,252 TOTAL HEATED AREA: 2,252 ABSTRACT CODE: FARM/RANCH RESIDENCE - IMPS ARCHITECTURAL STYLE: MANUFACTURED EXTERIOR WALL: MASONITE httn•//www aarrnar.t nnmlaesnssnr/Parr•,n1 as n?ArnanntN1lmher=Rf124500 R/29/2008 Parcel Detail Page 3 of 4 ROOF COVER: IICOMP SHNGL I ROOF STRUCTURE: GABLE INTERIOR WALL: DRYWALL INTERIOR WALL: AVG PANEL FLOOR: SHT VINYL FLOOR: CARPET HEATING FUEL: GAS HEATING TYPE: FORCED AIR STORIES: STORIES 1.0 BATHS: �2 ROOMS: 6 UNITS: 1 BEDROOMS: 3 YEAR BUILT: 1977 Additional Residential/Commercial Improvement Detail Tax Information Tax Year Transaction Type Amount 2007 Tax Payment: Second Half ($357.30) 2007 1 Tax Payment: First Half ($357.30) 2007 Tax Amount $714.60 2006 Interest Payment ($11.42) 2006 Interest Charge $11.42 2006 Tax Payment: Whole ($571.16) 2006 Tax Amount $571.16 2005 Tax Payment: Second Half ($286.93) 2005 Tax Payment: First Half ($286.93) 2005 Tax Amount $573.86 2004 Tax Payment: Whole ($664.82) 2004 Tax Amount $664.82 2003 Tax Payment: Whole ($739.12) 2003 Tax Amount $739.12 2002 Tax Payment: Whole ($752.28) 2002 Tax Amount $752.28 2001 Tax Payment: Whole ($768.88)1 2001 Tax Amount $768.88 2000 Fee Payment ($23.00) httn.//www aarnnart r.nm/accpc.cnrfParrp.1 ac n?ArrnirntNiimh&r=Rl7QA(lf! R/7.9/70C1R Parcel Detail Page 4 of 4 2000 JI Interest Payment I ($54.16)) 2000 Interest Charge $54.16 2000 Tax Payment: Whole ($773.74) 2000 Fee Charge $8.00 2000 Fee Charge $15.00 2000 Tax Amount $773.74 1999 Tax Payment: Whole ($775.80) 1999 Tax Amount $775.80, Mill Levy Revenues Detail Top. of Page Assessor Database Search Options Treasurer Database Search Options Clerk & Recorder Database Search Options Garfield County Horne Page The Garfield County Assessor and Treasurer's Offices make every effort to collect and maintain accurate data. However, Good Turns Software and the Garfield County Assessor and Treasurer's Offices are unable to warrant any of the infouriiation herein contained. Copyright © 2005 - 2008 Good Turns Software. All Rights Reserved. Database & Web Design by Good Turns Software. httn /hxnxnu narrnart rnmlaccaccnr/Parral gen'? rrr1iintE\Titlriltpr=Pf1?LLSCll1 R/?Q/?f1f1R Parcel Detail Page 1 of 3 Garfield County Assessor/Treasurer Parcel Detail Information Assessor/Treasurer Property Search 1 Assessor SubsetQuei. 1 Assessor Sales Search Clerk & Recorder Reception Search Basic Building Characteristics 1 Tax Information Parcel Detail 1 Value Detail 1 Sales Detail 1 Residential/Commercial Improvement Detail Land Detail 1 Photographs 1 Mill Levy Revenues Detail Tax Area Account Number Parcel Number 2007 Mill Levy 024 R024437 217715100007 45.837 Owner Name and Mailing Address RIVERS EDGE LLC PO BOX 1556 RIFLE, CO 81650 Assessor's Parcel Description (Not to be used as a legal description) SECT,TWN,RNG:15-6-93 DESC: TR OF MEANDER LAND. BK:0547 PG:0014 BK:0461 PG:0562 BK:1769 PG:326 RECPT:691621 BK:1736 PG:152 RECPT:684430 BK:1735 PG:841 RECPT:684344 BK:1725 PG:424 RECPT:682001 BK:1725 PG:422 RECPT:682000 BK:1666 PG:578 RECPT:669413 BK:1666 PG:576 RECPT:669412 BK:1614 PG:525 RECPT:658072 BK:0709 PG:0907 BK:0666 PG:0294 BK:0661 PG:0389 BK:0651 PG:0338 Location httn!//www.uarcoact.com/assessnr/Parrel.asn?Arcoi ntNnrnher=R 07.4417 8/29/2002 Parcel Detail Page 3 of 3 t 2006 1 Tax Amount $194.72 2005 Tax Payment: Second Half ($97.82) 2005 Tax Payment: First Half ($97.82) 2005 Tax Amount $195.64 2004 Tax Payment: Whole ($202.22) 2004 Tax Amount $202.22 2003 Tax Payment: Whole ($224.82) 2003 Tax Amount $224.82 2002 Tax Payment: Whole ($177.24) 2002 Tax Amount $177.24 2001 Tax Payment: Whole ($181.18) 2001 Tax Amount $181.18 2000 Fee Payment ($21.50) 2000 Interest Payment ($16.09) 2000 Interest Charge $16.09 2000 Tax Payment: Whole ($229.90)1 2000 Fee Charge $8.00 2000 Fee Charge $13.50 2000 Tax Amount $229.90 1999 Tax Payment: Whole ($230.52) 1999 Tax Amount $230.52 Mill Levy Revenues Detail Top of Page Assessor Database SearchOptions l Treasurer Database Search Options Clerk & Recorder Database Search Options Garfield County Home Page The Garfield County Assessor and Treasurer's Offices make every effort to collect and maintain accurate data. However, Good Turns Software and the Garfield County Assessor and Treasurer's Offices are unable to warrant any of the information herein contained. Copyright 0 2005 - 2008 Good Tums Software. All Rights Reserved. Database & Web Design by Good Turns Software. http:I/www. garrcoact.coin/assessor/Parcel.asp?AccountNuinber=R024437 8/29/2008 fraTT a 0 001 Tat Exempt City of Rifle 40 Tax Exempt City of Rifle Tax Exam• City of RI Wl+si 114151014 lac OF CrrY O RIFE lu 11 i SEG 15 1 5EC I'{ Tax Exempt City of Me 2h77-181-00-013 Mineral Owners other than Rivers Edge, LLC Map -2003 -Net 100 Park Ave Suite 1008 Oklahoma City, OK 73102 MJB Energy Company c/o Carla Bcrklau 1102 F ireihorn Court Rifle, CO 81650 13&L Resources, LLC PO Box 1556 Rifle, CO 81650 Barrett D Baker 717 1761 St., Suite 1545 Denver, CO 8020:. Layne Family Limited Partnership 12011 County Road 320 Rifle, CO 81650 Kristine Peterson 252 S. Wadsworth Blvd Suite 303 Lakewood, CO 80227 007) South Meander Llne RIVERS EO6E gi'a- 119-00-451 Adjoininn 2177 — 51BSECT Ph Ree 6B Ae. 1 51 Aa. 4.30 Ae- 6.86 A. 6.34 Aa. NAI. -MART NI 61;) TRACT A LOT 3A 002 LOT 2 LOT 4 OT 14 OT 15 OT 32 032 LOf 16 016 006 LO "TERs ATE, LOT 30 LOT 8 snob 70 RIFLE BUSINESS PARK CD LOT 21 i LOT 23 LOT 11 2177-141-00-121 L FARG E AL A p1 M Cr -EE Prr ot3 $vp UM k14 CO, Rt.0 ouhoet sok ASSESSOR MAT SUBJECT PARC & SURROUNDIU AREA T6S R93W SEC 1 DATE: 8-2908 Oldcastle SW Group dba United Companies of Mesa County IIOITf 0 COMPANIES Scott Pit RFr,rlVED (d ; 2000 L t i 'LLU COUNTY BUILDING & PLANNING County Special Use Permit and Floodplain Special Use Permit August 2008 Amended February 2009 Prepared by: Greg Lewicki And Associates, PLLC 11541 Warrington Cour! Prions: (3 03) 346-5196 Fax (303)-346-6934 Parker, CO USA 80138 E -Mail: inforrr),Iewicl:i.6iz SCOTT PIT COUNTY SPECIAL USE AND FLOODPLAIN SPECIAL USE PERMIT TABLE OF CONTENTS INTRODUCTION LEGAL DESCRIPTION EXHIBIT A PRACTICAL LOCATION EXHIBIT B PRE -MINING AND MINING PLAN MAPS EXHIBIT C MINING PLAN EXHIBIT D RECLAMATION PLAN EXHIBIT E RECLAMATION PLAN MAP EXHIBIT F WATER INFORMATION EXHIBIT G WILDLIFE INFORMATION EXHIBIT H SOILS INFORMATION EXHIBIT I VEGETATION INFORMATION EXHIBIT J FLOODPLAIN PERMIT EXHIBIT K BONDING EXHIBIT L OTHER PERMITS AND LICENSES REQUIRED EXHIBIT M COPY OF DEED AND RIGHT OF AGENT EXHIBIT N MINERAL OWNERS EXHIBIT 0 NEARBY LANDOWNERS EXHIBIT P GEOTECHNICAL STABILITY EXHIBIT EXHIBIT Q NEW 5.17 GRAVEL EXTRACTION REGULATIONS EXHIBIT R Scott Pit February 09 i-1 APPENDICES SPCC PLAN AND NPDES PERMIT APPENDIX A TETRA TECH REPORT APPENDIX B MAPS APPENDIX C TRAFFIC STUDY AND CDOT ACCESS PERMIT APPENDIX D WATERSHED PERMIT APPENDIX E DRMS APPENDIX F NOISE STUDY APPENDIX G GRAVEL WELL PERMIT .APPENDIX H AIR EMISSION PERMITS APPENDIX I WETLANDS INFORMATION APPENDIX J Scott Pit February 09 i-2 INTRODUCTION The Chambers Pit, to the north of the Scott Expansion, was initially permitted in 1979 through the Colorado Division of Reclamation, Mining, and Safety (CDRMS) under Permit #M-79-205. The pit's original reserves were mined out in the mid -to late `90's. The permit area was expanded in 1998 to include additional reserves. A portion of the permit area was released from bond in 2002. The additional reserves from the 1998 amendment are exhausted. The Operator, Oldcastle SW Group, dba United Companies of Mesa County, wishes to continue operations in the area. Additional reserves have been located across the river from the current pit. The expansion will be covered by an amendment to the Chambers DRMS permit, however, the Scott Expansion will operate as an independent pit from the Chambers site. This separation of the two pits from the original plan is due to issues concerning the ownership of the Rocks R Us parcel also known as the Bailey Pond. While no mining was planned on the Rocks R Us parcel in question, an overland conveyor was planned to transport material from the Scott Expansion to the Chambers Pit on the north side of the Colorado River. The currently approved Colorado Division of Reclamation Mining and Safety (DRMS) permit allows for processing and sales to occur from both sides of the river. However at the time of submission to the DRMS and approval, the general intent was to process and sell a majority of the material from the north side. Due to the removal of the conveyor crossing, all material mined in the Scott Expansion must be processed and sold from the south side of the river. This in effect separates the two pits. The only connection remaining between the two pits is the DRMS permit. Mining has been completed in the Chambers Pit and substantial reclamation has been completed. Once the Chambers pit has been deemed adequately reclaimed, this area will be released from the permit leaving only the Scott Expansion. The legal description of the permit submitted to the County and City will reflect only the Scott Expansion. A revised DRMS permit area description will be filed as part of the technical revision and release. The release will split the overall permit area into two independent closed areas. Because of the operational change, the Scott Expansion will be presented to Garfield County and the City of Rifle as an isolated pit with no physical interaction with the Chambers Pit. The following document reflects the new operational plan of a separate Scott Expansion and a closed Chambers Pit. The 2006-2007 plan contemplated 3 Large Scott Pit February 09 i-3 mining areas including the area inside the oxbow. The plan as resubmitted in August of 2008 has only two reduced mining areas. The large oxbow mining area has been removed. Also, the current plan shows that the landowner of the mined parcel is only Rivers Edge, LLC. Previous plans included Rocks R Us as an additional owner. Scott Pit February 09 i-4 Scott Pit February 08 B-2 Scot Expansion to the Chambers Pit United Companies 0 750 1,500 3,000 Feet PRE -MINING AND MINING PLAN MAPS OF AFFECTED LANDS EXHIBIT C Map C-1 shows the general pre -mine conditions of the site. Property boundaries and owners of nearby land are also shown. Soil boundaries from the NRCS soil survey have also been included. Map C-2 shows the pit at maximum extents of mining. This condition will not actually exist at any point. Each phase will be reclaimed concurrently with the next phases mining. Lakes will be allowed to fill once the final reclamation earthwork is completed. Map C-3 shows cross sections of the mining areas and their reclaimed states. Scott Pit February 09 C-1 LEGAL DESCRIPTION EXHIBIT c The site is approximately 0.5 miles east of downtown Rifle. Two legal descriptions are given below. The initial legal description defines the area covered by the Division of Reclamation, Mining, and Safety permit and is shown on Map C-1 which is included in Appendix C. The second legal description is the legal description required by the County. That description defines the parcels which comprise the Scott Pit area. A general location map is enclosed as Map B-1 in the next section. The surface owner is Rivers Edge, LLC. DRMS LEGAL DESCRIPTION The point of beginning lies S 31°23'16" E, 2384.28' from the NW Corner of Section 15; thence N 80'16'34" E a distance of 109.15'; thence N 80°16'34" E a distance of 109.15';thence N 69°22'05" E a distance of 136.56'; thence N 80°07'10" E a distance of 103.15'; thence 5 86°32'15" E a distance of 146.54'; thence S 70°37'46" E a distance of 135.73'; thence S 67°43'57" E a distance of 135.65'; thence S 89°56'55" E a distance of 85.43'; thence N 45°59'04" E a distance of 173.57'; thence N 88°06'35" E a distance of 250.47 ;thence N 85°30'25" E a distance of 320.08'; thence N 78°32'48" E a distance of 350.95'; thence N 71°17'36" E a distance of 170.46'; thence N 73°22'41" E a distance of 556.03 thence N 71°22'10" E a distance of 1486.98'; thence S 04°01'47" W a distance of 108.32'; thence S 00°24'58" E a distance of 425.64'; thence S 01°17'08" W a distance of 722.31'; thence S 01°00'14" W a distance of 440.96'; thence S 80°26'09" W a distance of 462.78'; thence S 86°31'05" W a distance of 264.60'; thence N 89°35'22" W a distance of 308.30'; thence N 84°54'35" W a distance of 232.88'; thence N 80°14'25" W a distance of 311.49'; thence N 80°07'07" W a distance of 334.72'; thence N 78°35'36" W a distance of 510.75'; thence N 78°31'36" W a distance of 754.98'; thence N 80°17'33" W a distance of 645.30'; thence N 84°01'46" W a distance of 163.00'; thence N 00°07'09" E a distance of 388.30'; which is the point of beginning, having an area of 93.46 acres. PARCELS LEGAL DESCRIPTION All that part of Parcels A and B, hereinafter described, Northerly of the Northerly right of way line of Interstate 70 as described in the rule and order recorded May 16, 1985 in Book 668 at Page 708. Parcel A All of Lots 1,2,3 and 4 and the East 232 feet of Lot 5, all in the McLearn Orchard Lands according to the map and dedication, Document No. 38435, in the Clerk and Recorder's Office, Garfield County, Colorado, known as the First Filing thereof (said Lots comprise part of the SE1/4, the SW1/4 and Lot 5 in Section 15, Township 6 South, Range 93 West, 6th P.M. Scott Pit February 08 A-1 Parcel B The West 143 feet of Lot 5 and all of Lots 6 through 11, inclusive, in Section 15, Township 6 south, Range 93 West, 6th P.M., as platted as the McLearn Orchard Lands, First Filing, Document No. 38435. Parcel No. 1 A tract of land situate in the SE1/4NW1/4 and the SW1/4NE1/4 of Section 15, Township 6 South Range 93 West, 6th P.M., more fully described as follows: Beginning at a point whence the Meander Corner of the West Line of said Section 15 bears: South 59°48' West 1555.1 feet: thence North 200.00 feet; thence North 77°15' East 250.00 feet; thence North 75°00' East 340.00 feet; thence South 70°41' East 404.40 feet; thence South 980.00 feet; thence South 85°55' West 170.00 feet; thence South 72°45' West 734.55 feet; thence North 41°20' West 672.50 feet; thence North 80°49' West 664.62 feet; thence South 52°20' West 180.00 feet, to the point of beginning. Parcel No. 2 Beginning at the Meander Corner of the East line of said Section 15, thence South 87°10' West 1320.00 feet; thence South 85°55' West 534.88 feet; thence North 980.00 feet; thence North 87°13' East 535.00 feet; thence North 72°02' East 1385.10 feet; thence south 1330.00 feet, to the point of beginning. Scott Pit February 08 A-2 PRACTICAL LOCATION EXHIBIT B The Scott Pit lies between the Colorado River and I-70 just east of the Rifle interchange. The site is surrounded by other gravel pits and industrial zoned parcels. Directly to the west is a CDOT parcel associated with the interchange and a possible "park and ride" location. Slightly further east and across the river are the remains of a vanadium mill and previous CDOT gravel pit. Reclaimed gravel pits being used for water intake ponds lie to the north of the Scott Pit Mamm Creek pit was previously operating just east of the Scott Pit. Slightly further east is the location of the Grant Brothers Pit. The Rifle Airport and Industrial Park are just across I-70 from the pit. The nearest residence is approximately 1700' from the site. The Colorado River, City of Rifle Intake Pond, railroad, and Highway 6 lie between the pit and this residence to the north. Map B-1 in this section shows the general location of the site relative to the City of Rifle and the surrounding land uses. Scott Pit February 08 B-1 MINING PLAN EXHIBIT D 1. Site Description The site lies on the south bank of the Colorado River immediately east of the town of Rifle and just north of I-70. The current operation, Chambers Pit, lies to the north has been operating as a DRMS 112 permitted operation since 1979 with some areas of mining occurring prior to 1977 (pre -law disturbances). The Chambers Pit has been mined out. This area is currently being reclaimed. The Scott Pit site is a total land parcel of 116.9 acres, owned by Rivers Edge LLC. There are two planned mining areas: Area 1: 7.1 acres west of the oxbow in the river and Area 2: 13.9 acres east of the oxbow. The expansion area (Scott Pit) will act as an independent pit. No material will pass between the expansion and the Chambers Pit. A major feature within the site is a large remnant oxbow located between Mining Areas 1 and 2 south of the river. The oxbow area is a wetland and will be avoided as well as the island created by the oxbow. The site's current land exists as riparian, wetland, and irrigated field. Much of the area is infested with knapweed, tamarisk and other undesirable plants. Some large cottonwoods also exist on the property. A house and outbuildings also are on the property. These may be removed prior to mining in Mining Area 2. To the west of the property lies a narrow strip of land owned by CDOT. The CDOT site is too small to be developed. To the east of the property lies the former Lafarge Marnr Creek gravel operation. The limited mining area avoids all wetlands except one small thin wetland created by a ditch in Mining Area 2. This wetland is no more than 0.19 acres. The property has in part been used for irrigation in the past but weeds have been present on the property for many years. As seen on Map C-1, much of the area lies in the 100 year floodplain of the Colorado River. Wetlands are also present, but almost all wetlands have been avoided due to the reduced mining plan of 2008. The USACOE has approved the plan for this pit as shown by the letter from the USACOE in July of 2008. This letter is enclosed in Appendix J. ScottPitFebruary 09 D-1 2. Site Geology The site contains Pleistocene age gravels with bedrock of Wasatch Formation shale and sandstone. The oxbow was once an active channel of the river, but due to deposition in the oxbow and degradation of the main stem, the oxbow has been naturally cut off from the current river channel. The gravel depth is expected to be 25 feet. The gravel has very little fines and is very permeable. In the irrigated fields, up to 5 feet of overburden is expected. The rest of the property has little overburden. The topsoil in this area is also thicker than in the riparian areas. The topsoil is expected to be 3 inches to over 1 foot in thickness as an average over the disturbed area. Average topsoil and overburden depths can be seen in the Mining Area Volumes table. The water table level is expected to be around 5300'-5311' in elevation. 3. Pre -Mining Work Pre -mining activities for the Scott Expansion will consist of infrastructure installation, topsoil and overburden stripping, and site sloping to ensure all disturbed areas will drain into the pit. These activities will take place in and around Mining Area 1 prior to mining Mining area 2 will be prepared in a similar fashion when Mining Area 1 is mined out. The pre -mining facilities to be installed are the office trailer, scale, sanitation tank, porto-potties, fuel bunker. See Map C-2. 4. Stormwater Control The disturbed areas of the site will be sloped to isolate the site from the surrounding area. Therefore, all run-off will drain to the pits during the mining operation. The active pit will have a pit pump as shown on Map C-2 that pumps clean water to the River. A combined stormwater/process water discharge permit will be obtained for the discharge from the pit pumps. The stormwater volume was determined using the calculations below as described in the "Procedures for Determining Peak Flows in Colorado", which includes and supplements Technical Release No. 55 "Urban Hydrology for Small Watersheds." Prior to discharge, sediment will be Scott Pit February 09 D-2 controlled by keeping the pit pump lower titan the working area and using gravel filter check dams around the pump. Mining Area #1 Stormwater Calculations The area of 11.5 acres shown below includes some area outside the pit that will drain to it. Runoff Curve Numbers(CN) for Watershed Area Description Hydrologic Soil Group Area (acres) CN Mined land disturbed Group C Soils 6.6 87 Pasture or Rangeland: Good (50-75% ground Group C Soils 7.1 74 cover; not heavily grazed) Total Area and Average CN 13.7 81 Group A Soils: Group 11 Soils: Group C Soils: Group D Soils: Hydrologic Soil Group High infiltration (low runoff). Sand, loamy sand, or sandy loam. Infiltration rate> 0.3 inch/hr when wet. Moderate infiltration (moderate runoff). Silt loam or loam. Infiltration rate 0.15 to 0.3 inchihr when Low infiltration (moderate to high runoff). Sandy clay loam. Infiltration rate 0.05 to 0.15 inch/hr when wet. Very low infiltration (high runoff), Clay loam, silty clay loam, sandy clay, silty day, or clay, Infiltration rate 0 to 0.05 inch/hr when wet. The storage volume of the pond is calculated as the extraction area above the water table. The water table lies approximately 4 feet below the surrounding surface. This allows for a more than sufficient storage volume for all mining areas. Stormwater/Sediment Pond Design Design Event 100 -yr 24 -hr Event Design Precipitation (inches) 2.60 Watershed Area (acre) 13.7 Watershed Average CN 81 Calculated Runoff Volume (acre -ft) 1.411 Actual Runoff (acre -ft) 1.411 Even at the start of the excavation, the pit will be large enough to contain this volume. Scott Pit February 09 D-3 Mining Area #2 Stormwater Calculations The area of 49.5 acres is the maximum that could drain to the pit, assuming no berms, ditches or stockpiles. Runoff Curve Numbers(CN) for Watershed Area Description Hydrologic Soil Group Area (acres) CN Mined land disturbed Group C Soils 13.9 87 Pasture or Rangeland: Good (50-75% ground Group C Soils 35.6 74 cover; not heavily grazed) Total Area and Average CN 49.5 78 Group A Soils: Group B Soils: Group C Soils: Group D Soils: Hydrologic Soil Group High infiltration (low runoff). Sand, loamy sand, or sandy loam, Infiltration rate > 0.3 inch/hr when wet. Moderate infiltration (moderate runoff). Silt loam or loam. Infiltration rate 0.15 to 0.3 inch/hr when Low infiltration (moderate to high runoff). Sandy clay loam. Infiltration rate 0.05 to 0.15 inch/hr when wet. Very low infiltration (high runoff). Clay loam, silty clay loam, sandy clay, silty clay, or clay, Infiltration rate 0 to 0.05 inch/hr when wet. The storage volume of the pond is calculated as the extraction area above the water table. The water table lies approximately 4 feet below the surrounding surface. This allows for a more than sufficient storage volume for all mining areas. Stormwater/Sediment Pond Design Design Event 100 -yr 24 -hr Event Design Precipitation (inches) 2.60 Watershed Area (acre) 49.5 Watershed Average CN 78 Calculated Runoff Volume (acre -ft) 3.4481 Actual Runoff (acre -ft) 3.4481 Even at the start of the excavation, the pit will be large enough to contain this volume. Scott Pit February 09 D-4 5. Topsoil and Overburden Handling Topsoil will be stripped and stockpiled or directly placed as part of reclamation prior to the commencement of mining in a particular mining area. After stripping, topsoil which will be stockpiled will be seeded promptly in order to minimize soil loss. Topsoil will not be stockpiled in the floodplain; rather it will be stockpiled in the permit area above the floodplain, or at the bottom of previously rnined areas. The one exception to this is a small portion of a temporary topsoil berm placed to the east of Mining Area 2 to provide additional protection for the eagles while the northern part of Mining Area 2 is being mined. This beim is from 3 feet to 6 feet in height and will have sideslopes of 2H:1 V. The berm is expected to be in place for the mining of Area 2 and will be removed shortly thereafter. Most stripped topsoil will be placed to reclaim the previous mining area. There will be an abundance of topsoil due to the reduction in surface area caused by the formation of a lake within the permit area. This excess topsoil will be used for extra growth media as well as slope backfill material during reclamation to create as much undulating shoreline as possible. The estimated topsoil stripping thickness is 3" to 12". Overburden will be stripped prior to the commencement of mining in a particular mining area. Overburden thicknesses range from zero to 16 inches. Stripped overburden will be used to backfill the mining slopes of the pits from 2H:1 V to 3H:1V and to create undulating shorelines as much as possible. Details of topsoil and overburden volumes are shown in the Mine Area table. 6. Mine Plan This mining area consists of 7.1 acres in Mining Area 1 and 13.9 acres in Mining Area 2. See Map C-2. Many precautions are in place to ensure that the water discharged is clean. This discharge is regulated by a NPDES discharge permit with the Colorado Department of Public Health and Environment which limits the sediment load in the discharge to many times less than the average sediment load in the River itself. The mining schedule is given in subsection 13. Scott Pit February 09 D-5 Most facilities will be placed outside the 100 year floodplain in the southeast comer of Mining Area 2. The crusher and screen may be located in the pit. Mining is planned in two distinct areas, as shown on Map C-2. These are Mining Areas 1 and 2. Each area is further divided into phases of 3.5 to 5.5 acres each. Prior to mining, each area will need to be dewatered. This will be accomplished by installing a perimeter dewatering trench. The trenches will lead to a sump as shown in the maps. Water will be allowed to pass through a gravel berm prior to entering the sump. This will act to filter out sediment. The dewatering pump in Mining Area 1 will discharge to the Colorado River, the pump in Mining Area 2 will discharge to the wetland oxbow. This is necessary due to the water table draw -down associated with pit dewatering. All water discharged will meet NPDES requirements and will likely contain much less sediment than that which exists in the river naturally. A bald eagle's nest has been located to the northeast of Mining Area 2 for the past 5 years. The eagles at this site constructed the nest after industrial operations had begun at the neighboring Lafarge pit. In the past year, the bald eagle has been removed from the Endangered Species List. After meeting with Will Spence of the CDOW, we proposed mitigation practices that would lessen the impact on the eagles, whose nest is located within the 1/2 mile radius of the nest but primarily outside the '/ mile radius of the nest. These items are shown in detail in Exhibit H Wildlife. Since this meeting in March of 2008, the eagles nest has been partially blown down by wind. United commits to all items outlined below and in Exhibit H, provided that the eagles decide to rebuild and use the nest. In order to mitigate the impact of the Scott Pit operations in Mining Area 2, mining within 1/4 mile of the nest will only take place during a six month period of time in a single year as determined by the Colorado Division of Wildlife (CDOW). Three of these six month time frames, one per year, will be needed to complete all activity within this 1/4 mile radius. The area will be mined out in the first period and reclaimed in the second. United will mine out the area within 'A mile of the nest within 2 years (2 — 6 month periods) and will use the third year to reclaim the area. This area of the pit will also be mined from the southwest pit bottom to the northeast, to further reduce disturbance of the eagles. Scott Pit February 09 D-6 As mining progresses through the areas, the pumping arrangement will continually change. The locations of the pumps and ditches are approximate as shown on the mine plan maps. The overall design is to dewater one pit at a time. However some overlap of two mining areas being dewatered at the same time is possible at the end of a mining area's life. Wetlands surrounding the dewatered area will be supplied with water from the pits. It is expected that dewatering of a pit will require approximately 1000 gallons per minute pumping capacity. During initial dewatering, the pumping demand may be up to three times the stable pumping rate or 3000 gallons per minute. Once the pit has been dewatered, mining will begin. Primarily, front-end loaders will be used to mine the raw gravel. The slopes of the pit will be mined to 2H:1V slopes at the outer edges of the pit except in two minor areas where well pads are constructed, where the mining slope will be 0.5H:1V to 1.0H: I V, but will be backfilled to 3H:1V prior to use of the pad for well drilling. While mining in the center of the pits, a steep highwall will be also be used (0.5H:1V). This highwall will be laid back as it approaches the mining limit edge. Some dozer pushing or ripping may also be used. The loader will directly load to a crusher or into trucks which will deliver the material to a crusher. Equipment will utilize the existing roads where appropriate and additional roads will be added as shown in the mine plan map. The road alignments shown on. Map C-2 are the approximate final locations. Current roads as seen in Map C-1 will be utilized until realignment is necessary. For the initial Phase of Mining Area 1, all mined material will be brought to the last phase of Mining Area 2, which is the primary staging area, where the material will be crushed and screened. Once Phase 1 is mined deep enough to conduct stockpiling below the original surface level, the crusher and screen will be brought to this area and will stay there for the rest of Mining Area 1. This is due to floodplain considerations. The operator is committed to maintain all stockpiles at or below the original surface. Stockpiling and crushing will occur within the pit bottom once a mining area has been opened up. For the final phase of Mining Area 2, the scale, office trailer and other facilities will be removed from the site. The gravel will be mined and delivered to the crusher and screen, which will be located in the bottom of the pit. The ramp will then be used to haul the screened material off site. Scat( Pit February 09 D-7 The primary staging area located in Mining Area 2 will serve as the location for portable Asphalt and Concrete Plants, scale, and fuel tanks during the majority of the mine life. When the final mining phase is begun, the site will no longer allow portable Asphalt or Concrete plants onsite. The plants and fuel tanks will also be removed. The existing scales or a more portable set of scales will be moved to the bottom of the pit for the remaining mining. 7. Spill Prevention, Containment, and Countermeasure Plan A SPCC plan has been prepared for the site and has been included in Appendix A. Also if any "reportable quantity" of hazardous material or waste is released into the environment, the operator will notify staff of the Colorado Division of Reclamation, Mining, and Safety as well as all other appropriate local, state and federal agencies. This is more completely described by an excerpt from the February 8, 2002 DRMS memorandum regarding Minerals Program Notification of Toxic or Hazardous Materials Spills at Mine Sites. "A reportable spill is a spill of any toxic or hazardous substance (including spills of petroleum products) within the permit area reportable to any Division of the Colorado Department of Public Health and the Environment, the national Response Center, the Colorado Emergency Planning Committee, or the State Oil Inspector. The operator shall notify the Office of a reportable spill within the permit area using the same timeframe required by the permit, license, notice, Act, Rule or Regulation governing the reporting of the spill to the appropriate agency. Notice of a reportable spill shall be faxed to: Minerals Program Supervisor, Division of Reclamation, Mining, and Safety, FAX (303) 832-8106. The FAX shall include a call-back number of a responsible company official for the DRMS staff to use as a contact." In order to address concerns with the City of Rifle about pit flooding, a revision to the SPCC Plan has been made To prevent contamination of surface water with petroleum products in the event of flooding the active mining area, the rivers surface elevation will be monitored through staff gages that are placed at pre -determined locations (the low points where water would enter the two mining pits). During high flows, Gauge #1 is used to monitor Mining Area #1 and Gauge #2 is used to monitor Mining Area #2. Monitoring will commence when the elevation of the river gets to within 2.5 feet of the elevation that would flood the mining area. When the river elevation reaches 1.5 feet below the elevation that would flood the mining area, all the equipment will be removed from the pit and taken to higher ground. The continuous monitoring level and Scott Pit February 09 D-8 evacuation level for each pit are detailed in the table below. Monitoring will be achieved using staff gages near each pit. These gages are shown on Map C-2. Mining Area Elevation of Mining Area Flooding Evacuation Level Monitoring Level 1 5308.0 5306.5 5305.5 2 5310.0 5308.5 _ 5307.5 The locations of the staff gages are shown on Map C-2 of the Mine Plan as well as the SPCC Flood Monitoring Map. Site personnel will be trained in the procedures for monitoring the gages. The Monitoring Level on the gages will be marked in a dashed red line. The Evacuation Level will be marked in a solid red line. Text for both levels will also be written next to the respective lines. 8. Production Rates The site's production volumes and rates can be seen below. An annual expected average and maximum rate are shown. The life expectancy of the pit is based on this average rate. Construction Materials Annual Production (Sellable Material) Use Asphalt Aggregate Concrete Aggregate Totals Max Rate(tons) 200,000 210,000 100,000 Average Rate(tons) 25,000 1 50, 000 25,000 Reject Rate(%) 10% 0% 10% Raw Matcrial(tons) 27,777 150,000 27,777 510,000 200,000 4% 205,555 9. Schedule of Operations The gravel pit hours of operation will be 6:00 a.m. to 8:00 p.m., Monday through Saturday and 8:00 a.m. to 1:00 p.m. on Sundays from March through November. The operating hours during the December through February period will be 6:00 a.m. to 6:00 p.m. Monday through Saturday. Overnight operation of an asphalt batch plant or concrete plant for public agency projects requiring such activity, may be allowed subject to approval of the Board of County Commissioners in a public meeting at least two weeks in advance of any proposed night time activity. The applicant shall notify all adjacent property owners of such meeting by return -receipt mail at least 10 days Scott Pit February 09 D-9 prior to the meeting and present the receipts at the meeting. This schedule is based on the previously approved Glen's Pit. 10. Mine Area Details The expansion's reserves are divided into mining areas with each area having multiple phases. Once a mining area's reclamation earthwork has been completed, pumping will cease and the pit will be allowed to fill. This separation of areas and phases will limit the overall disturbed area. Areas will be mined in sequential order. Many new commitments have been made for contemporaneous reclamation, as described in the subsequent section on visual impacts. Mining Area details can be seen below. Mining Areas and Volumes Note: Total area is less than the permitted acreage. The remainder exists as undisturbed areas, roads, and stockpiles. 11. Facilities and Mobile Equipment All facilities will be portable or semi-portable on this site. Most of the facilities will be located at the extreme southeast corner of the permit area, which is located outside the 100 year floodplain of the Colorado River. On Map C-2, this area is shown as Mining Area 2 - Phase 4. The facilities include a truck scale, office trailer with potable water, concrete plant, asphalt plant, fuel bunker and truck loading area. A crusher & screen plant and potentially a wash plant will also be located in this area during initial mining of Mining Area 2. Once sufficient room is opened at the bottom of the pit, these facilities will be moved to the pit bottom. This is normal for almost all wet pit Scott Pit February 09 D-10 Area (acres) Raw Gravel (tons) Topsoil Thickness (ft) Topsoil Volume (CY) Overburden Thickness (ft) Overburden Volume (CY) Area 1 Phase 1 3.68 115,506 1 5,937 4 23,748 Area 1 Phase 2 3.42 111,854 1 5,518 4.5 24,829 Area 2 Phase 1 3.50 152,723 1 5,647 4.5 25,410 Area 2 Phase 2 4.97 269,860 1 8,018 4.5 36,082 Area 2 Phase 3 2.50 103,689 1 4,033 4.5 18,150 Area 2 Phase 4 2.95 142,608 1 4,759 4.5 21,417 Totals 21.02 896,240 33,912 149,637 Note: Total area is less than the permitted acreage. The remainder exists as undisturbed areas, roads, and stockpiles. 11. Facilities and Mobile Equipment All facilities will be portable or semi-portable on this site. Most of the facilities will be located at the extreme southeast corner of the permit area, which is located outside the 100 year floodplain of the Colorado River. On Map C-2, this area is shown as Mining Area 2 - Phase 4. The facilities include a truck scale, office trailer with potable water, concrete plant, asphalt plant, fuel bunker and truck loading area. A crusher & screen plant and potentially a wash plant will also be located in this area during initial mining of Mining Area 2. Once sufficient room is opened at the bottom of the pit, these facilities will be moved to the pit bottom. This is normal for almost all wet pit Scott Pit February 09 D-10 operations. During the mining of Area 2 -Phase 4, there will be no asphalt or concrete production onsite. The scale and office trailer will be very portable in nature and will be moved as necessary. All portable plants are licensed and permitted individually. Prior to bringing a portable plant onsite all permits and information regarding the plant will be submitted to the County. No permanently stationed mobile equipment is anticipated for this site. Various pieces of mobile equipment will be brought onsite to meet current needs. For instance, when the portable crusher is brought onsite to produce aggregate products, all necessary mobile equipment will accompany the portable plant. After the plant has completed its goal, the plant and mobile equipment will be moved to the next pit to crush there. If a piece of equipment is permanently stationed at the site it will be registered with the County. Map C-4 shows the detailed layout of the facilities area when the crusher and screen plant and wash plants are located at the bottom of the pit. Since it is not known exactly what portable plants will be brought to the site, the dimensions and locations of the plants are approximate. The storage of fuel on site will be as follows: a. Crusher and Screen Plant — there are a total of 6 separate tanks for diesel fuel, 2 each @ 250 gallons, 2 each © 500 gallons and 1 @ 600 gallons. This portable plant has separate fuel tanks for each component of the plant: primary crusher with two saddle tanks, 2 cone crushers and 2 screens. b. Asphalt Plant —1 tank of 10,000 gallons diesel or burner fuel c. Ready Mix Plant and Trucks —1 tank of 10,000 gallons diesel. d. Wash Plant — 1 tank @ 1000 gallons. This is the maximum storage for the fuel tanks on site. The loader would receive fuel from of one of these tanks. If United does not move the asphalt or ready mix plants onto the site, there will be a 1000 gallon tank for the loader only, which will be located near the office trailer outside the 100 year floodplain. All of these tanks are attached to the portable plants themselves. They are all double walled tanks or secondary containment is provided by a steel trough below the tank which can store a volume of at least 110% of the full tank volume. The asphalt plant and concrete plant tanks are stored outside the 100 year floodplain, as shown on Map C-4. The portable crusher & screen plant and the wash plant would be located at the pit bottom for the vast majority of the mining operation. These plants would be moved out of the pit if Scott Pit February 09 D-1 1 floodwaters rise in the river to a certain level, as part of the staff gage monitoring system. United cannot afford for these plants to be inundated with water; it is in operator's best interest to ensure that these plants are removed before any floodwaters enter the pit Scott Pit February 09 D-12 12 . Mine Access and Traffic The access to the site is from an unpaved CDOT frontage road from the Mamm Creek exit of Interstate 70. This frontage road is bordered on the south by 1-70 and on the north by the following parcels. SNYDER, JAMES G. 3495 COUNTY ROAD 346 SILT, CO 81652-9668 SNYDER, JAMES G. & JEAN E. (TIC) 3495 COUNTY ROAD 346 SILT, CO 81652-9668 GYPSUM RANCH CO LLC A COLO LIMITED LIABILITY COMPANY PO BOX 1220 CARBONDALE, CO 81623-1220 GRANT BROS RANCH LTD PO BOX 1027 BASALT, CO 81621-1027 Parcel: 2177-124-00-301 Parcel: 2177-132-00-300 Parcel: 2177-141-00-121 Parcel: 2179-074-00-099 The Access Map showing the permit boundary, the frontage access road and the parcels around the access road are enclosed in this section. The parcel boundaries shown on the Access Map are approximate. The western end of the frontage road is the Scott Pit property. The total length of frontage road that will be used by United to access the pit is 2.2 miles. CDOT Permit #305272 covers the use of this access for the Scott Pit site, The access is limited to 335 daily trips as defined by CDOT. As a condition of this permit, the access road will be paved from the mine entrance to the edge of the current pavement. This will benefit the operation and surrounding owners in two ways: 1) Road maintenance will be greatly reduced and 2) dust generation from, truck traffic will be removed. A copy of the CDOT permit is included in Appendix A. While the permit will allow up to 335 daily trips, it is anticipated that considerably less trips will be taken on average. The anticipated annual average is likely to be closer to 150 daily trips. Scott Pit February 09 D-13 60 rfdvrragag jl J 11oos 2179-0174-00-O9, Grant Faros Ranch LTD 2177-124-00-301 James G. Snyder rontage Road Access Road Mamrn Creek Exit ` Western Extent of - 1 -70 Frontage Road Nate,: Pamcl records and boundaries From County Aiis000r Mope - NOV 2008 Dorcol boundoricti9 ono opproodmotra. Revisions BY DATE DES RE DAH RE CHK DATE 11/04/08 SCALE i = 1700 APPO Greg Lewicki And Associates 1 Isn, mw mxn C orn Pow CO LISA put E. • into:Hfsbisittte Phena i7UJI-3-511718 Access Map Scott Pit United Companies The site has a barbed wire fence along the east, south and west boundaries. A gate is located at the point that the access road enters the Scott property. This gate will be improved as part of the mine operation. The gate will be locked during off hours. 13. Mine Life The expected mine life can be seen below. It is based on the anticipated average production of 200,000 tons per year. If actual production exceeds the average, the total mine life will be reduced. If actual production is less than the average, mine life will be extended. Mine Life Task Description Pre -mining preparations (Ditches, Berms, Stripping, etc.) for expansion area, Mine Area 1 Phase 1. Mine Area 1 Phase 2 reclaim previous Phase. Mine Area 2 Phase 1 reclaim previous Phase. Mine Area 2 Phase 2 reclaim previous Phase. Mine Area 2 Phase 3 reclaim previous Phase. Mine Arca 2 Phase 4 reclaim previous Phase. Reclaim final mining Phase. Expected Duration (yr) 0.10 0.5 1.0 1.0 1.30 0.66 1.2 0.20 Total 5.96 United commits to prompt reclamation after the final Phase is mined and all materials are sold from the site. This is also discussed in the Reclamation Plan. 14. Visual Impacts and Contemporaneous Reclamation As with any earthwork activity, during the operation there will be visual impact, The primary viewshed is I-70 and is significantly higher in elevation than the proposed site, therefore limiting the mitigation techniques. Berming or fencing will not provide any mitigation nor is it required by County Standards. The pit will be much more difficult to see from the other three directions due to flat terrain and the presence of very large trees and shrubs. Also, the adjacent property to the east is Scott Pit February 09 D-14 the La Farge Mamm Creek gravel pit. The area to the north is all industrial use on the other side of the Colorado River. Highway 6 is further north but cannot significantly see the operation due to the large trees and shrubs along the 100° buffer between the River and the pit. Much concern has been expressed about visual impacts and the following commitments have been made to address this issue: Visual Impact and Contemporaneous Reclamation Commitments The Mining Plan has the following commitments: 1) In any mining phase, the ruined length of2H:1 V slope will be backfilled as necessary prior to topsoiling and seeding. Generally, this is a milder slope of at least 3H::1 V The amount of mined slope allowed to be present that is not backfilled at any given time is 1 000 feet. Map C-2 shows this exact length in Mine Area 1. 2) The amount of backfilled slope that is not topsoiled is limited to 400 linear feet. Topsoiling is required on all surface areas down to 5.0' below expected water level. Map C-2 shows this exact length in Mine Area 1. 3) Seeding and mulching according to the approved plan will occur on all topsoiled areas each spring (March 15 -April 15) or fall (September 15 to November 15) no matter how small the area is. 4) Within 6 months offinishing mining in any designated mining area (2 total), the area must be fully reclaimed including topsoiling, seeding, mulching, sapling planting, wetland preparation and water filling of the lake. This means that a person traveling westbound on 1-70 at 70 miles per hour will see approximately 2/3 of the pit disturbed which corresponds to 1400 feet of length or approximately 4 seconds of travel along the pit. This is the worst case visual scenario. Scott Pit February 09 D-1 5 5) The theme for reclamation will be the creation of a riverine habitat dominated by lakes and wetlands usable by wildlife and generally presenting a natural visual setting to observers traveling east of Rifle. Map F-3 shows a simulated aerial photo of the site after reclamation. Nothing in the final reclamation plan will preclude future development of the property for other purposes as may be allowed by the applicable land -use codes. 6) Commil to a minimum of a 100' wide natural buffer between the river edge and the lake edge which contains large cottonwood tress and other shrubs in additional to many other trees along the oxbow channel which will be preserved. See Map C-2. 7) The operator will submit an annual report to the County with GPS measurements shown on a neap showing the current disturbance, what areas have been backfilled, where topsoil stockpiles are located, all site structures, what areas have been seeded, mulched and what is planned for the ensuing 12 months. 8) All of the above will become binding conditions of the County permit and the State Division of Reclamation, Mining and Safety permit. The Division of Reclamation, Mining and Safety can withhold the reclamation bond ifthe final reclamation is not executed according to the plans. Also, the Division can impose fines for reclamation that does not follow the prescribed commitments made at any stage of mining. The commitments outlined above go beyond what previous operations have done in Garfield County. They are state of the art for the County and few other pits in the State come close to these commitments. We understand the concerns of the community and we have done our best to address them. Enforcement Options: Scott Pit February 09 D-16 a) The County commits to notifying the Operator of any compliance concern and allow an inspection with site personnel and the designated County inspector prior to contacting any agency. b) The County can request a site inspection with one day's notice to the Operator. Full access to any part of the site will be granted. On request, all paperwork must be shown. The County cannot request a large number of inspections that would interfere with normal operation without cause. c) A full list of all other permits will be provided to the County. Any person at any time can call the following agencies directly and request an inspection if they believe a condition of that agencies permit is being violated. - CDPHE Air Quality Control 303-692-3150 - CDPHE Water Quality Control 303-692-3500 - US Army Corps of Engineers 970-243-1199 - Division of Reclamation, Mining and Safety 303-866-3567 - CDOT Grand Junction office 970-248-7000 Agencies will issue violations with fines depending upon the gravity of the violation and the past history. d) The County will be invited to any bond release inspection of the State Division of Reclamation, Mining and Safety. The County inspector will have the opportunity to demonstrate that any item of the permit has not been complied with and that bond should not be released. e) The County will have the opportunity to evaluate the performance of the Operator with regard to the County permit and take action if it is demonstrated to the Operator that certain conditions of the permit have not been met. The Operator acknowledges that the County has performance standards in place that could lead to revocation of the Special Use Permit if continued violations of the permit occur over a period of time. Scott Pit February 09 D-17 15. Potable Water and Sanitary Facilities Similar to other gravel pits in the area, portable toilets will be provided by a local service provider at the main facilities area where the plants are located. Due to the reduced life span of the operation, only porta-potties will be used on site for sanitation. Potable water will be provided through a bottled water supplier like Deep Rock. The estimated amount of potable water to be delivered to the site is 100 gallons per month. The potable water will be stored and dispensed in the office trailer which will be located in the facilities area. 16. Mosquito Control This lies within a currently mosquito controlled area of the County. Therefore it is already inspected and treated when necessary. To aid the prevention of mosquito infestation, the areas of shallow ponding will be graded to reduce potential breeding areas. Generally, active pits do not present potential breeding sites. This is due to the water flowing rather than being stagnant. The settling ponds will be the potential sources and will likely be trouble area. Because the wetlands on this site are being avoided these areas also will be potential mosquito sources. The operator is committed to working with Mosquito Control to prevent any issues with mosquito control. 17. Noise Impacts Noise is not a significant issue since the site is bordered by the former La Farge Mamm Creek gravel pit to the east, I-70 to the south, the Colorado River and the Chambers Pit to the north and a small CDOT parcel which is unused to the west. United Companies commits to operating within State standards for noise at all times. A noise study has been conducted for the site and is enclosed as Appendix G. 18. Glare from the Lakes The issue has been raised about the possibility of glare causing problems with planes using the Garfield County Airport and possibly cars on I-70. We believe that this is not an issue because it is our understanding that approximately 85-90% of the planes take off to the west and raise the nose of the plane to a high angle such that the lakes will not be in view. Landing planes from the east will not see the lakes. Since the lakes will be north of 1-70, and the sun is generally at some angle Scott Pit February 09 D-18 from the south, any glare produced from the sun will bounce back to the north and will not be seen by travelers on 1-70. Other roads such as Highway 6 are to far away and are located at a slightly higher elevation, which is not enough to see any glare. Scott Pit February 09 D-19 19. Water Quality Concerns Since the gravel to be mined is below the water table, a pit pump must be used to dewater the pit prior to mining. As shown in Exhibit G — Water Information, the pump will only pump clean groundwater in to a sediment sump above the pit prior to discharge into the River. The approved NPDES permit for the site allows for sediment levels between 35 and 70 milligrams per liter total suspended solids. This level is far lower than the average sediment load of the River itself. USGS gage water quality data show that the River runs an average flow that is much higher, with flows during runoff events and spring thaw reaching 1500 to 2000 milligrams per liter or more. The discharge from this operation will be better in quality than the River itself. The asphalt plant and concrete plant facilities and associated fuel tanks will be located outside the floodplain on high ground in Mining Area 2 as shown on Map C-2 and Map C-4. 20. Compliance with Garfield County Chanter 11 Comprehensive Plan Goals, Objectives, Policies Regarding Gravel Extraction Operations Goals United appreciates that the County recognizes the rights of the landowners in developing gravel extraction in the County, however, it is also recognized by United that the development of these resources must occur with any adverse impacts mitigated to the best extent practicable. Considering the growth that Garfield County is experiencing, and considering the growth that will likely occur in the future, it is important to identify what gravel resources are available to satisfy this growth as well as maintain existing roads as needed. In Garfield County, the only gravel resources that can be used for concrete and asphalt production are along the Colorado River floodplain upstream of Rifle. Downstream, there is too much shale in the floodplain, and it is very difficult for operators to meet the strict specifications for concrete and asphalt using this material. However, some of this floodplain material is adequate for road base, as is seen by the Grand Junction Pipe pit near Parachute. This pit is supplying a large demand from the gas operations in the Piceance Basin. Scott Pit February 09 D-20 Another important point to consider when determining if a pit should be approved is location. With the dramatic rise in diesel prices over the past few years, it is very costly to move gravel material to market end users with trucks. We estimate that this cost is approximately $0.30-$0.35 per ton mile. Moving gravel products an additional 10 miles can add 20-40% of the delivered cost of the material. In addition, extra trucking increases wear and tear on roads and releases significantly more carbon dioxide to the atmosphere. In short, if you can mitigate the impacts, you need to need to have pits near the demand. Since the road base demand is being met from the pits south of Rifle, the majority of the product from this pit is expected to be soldin the immediate vicinity. The Scott Pit does meet the needs of the community and does mitigate impacts as described below. Objectives' The mine plan is now based on a smaller footprint as the largest mining area in the former proposals has been removed (the reining area in the river oxbow). For this reason, the life of the pit is substantially reduced, which is now less than 6 years. Adjacent uses consist of a gravel pit to the east, I-70 to the south, the river and the Chambers Pit of United to the north, and a CDOT owned parcel to the west, which was purchased for some future transportation use. South of 1-70 are substantial commercial and industrial uses such as Walmart, industrial supply yards, other retail, etc. The pit cannot be seen from the area south of I-70. The enclosed noise study in Appendix G shows that noise impacts of the operation are minimal, especially since noise from the existing adjacent 1-70 is similar. United understands the uneasiness of some living in the Rifle area regarding the visibility of the pit. The pit is visible from I-70 and it is not possible to mitigate this with berms or other visual screens, since the Interstate is elevated in this area. For this reason, extensive commitments have been made for contemporaneous reclamation, with measurable levels of unreclaimed slopes allowed at any one time, etc. See Subsection 14 in the Mine Plan for details. These are state of the art commitments. When combined with the lessening of the pit life, the impacts are reduced to the Scott Pal February 09 D-21 greatest extent possible. Additionally, when the pit is reclaimed, the site will actually be a visual improvement over the existing condition. All weeds, tamarisk and Russian olives will be removed. Two attractive lakes will be created with wetland shorelines and the area will be an excellent wildlife habitat. Air quality will be controlled by operating all plants in compliance with the CDPHE permits for each portable plant. The site has a fugitive dust permit which also has commitments for dust control which must be followed. Since the gravel is wet during mining, most of the dust is already reduced compared to a dry gravel pit. Water discharge quality is controlled by using gravel filters in the pit around the pump and keeping the pump level below the pit operating level. The NPDES discharge limits are many times stricter than the amount of sediment which naturally flows in the river as suspended solids. Substantial effort has been put into modifying the plan to account for the possibility that the eagle pair on the La Farge property to the east, will fully rebuild this nest and occupy it. United understands that this pair of eagles has attracted attention and we must do everything possible to see that they are not disturbed by our operation. United has worked extensively with Westwater consultants, Greg Lewicki and Associates and Will Spence of CDOW on the mitigation steps that United could make in order to minimize any disturbance to the eagles. These mitigation steps are clearly spelled out in Exhibit H of this application. In order to ensure that the subsequent pit lakes are not captured by the river at a later date, after United has completed the site reclamation, United has utilized an inflow/outflow structure designed by Tetra Tech. This mitigation technique has also been used at the Mamm Creek Pit immediately to the east and a number of other sites in Colorado. It is a proven and often used design to provide minimal risk that the river will capture the pit lakes. Details of the design are presented in the Watershed Permit application to the City of Rifle, which is enclosed in Appendix E. Scott Pit February 09 D-22. Policies United firmly commits to all the mitigation statements throughout this permit application. As discussed in the previous Subsection 14 of this Exhibit D - Mine Plan, there are enforcement options available to the surrounding community. These options are clearly defined and ensure that United must abide by the conditions of all permits that affect the quality of life in the surrounding area. Given the very strict commitments that United has made to mitigate the impacts of this operation and given the well established need to develop this limited resource, United feels that it has met the goals, objectives and policies of the Comprehensive Plan for Gravel Extraction mOperations. 21. Dust and Smoke Control Dust and smoke is regulated through the State Air Permit. This pit will produce minimal fugitive dust due to the fact that is a wet pit. The material that is mined will have high moisture content and will naturally suppress dust. Also, this gravel has a low fines content; for this reason, its processing results in very little fine waste. The portable crushing and screen plant will move with the mining operation. It will have its own air emissions permit. Controls for this equipment include water sprays and enclosed crushing. The asphalt and concrete plants located on site will have individual portable air permits and will be operated within the specifications required by the State. All of these permits require opacity testing for dust and smoke. A revised Air Pollution Emission Notice (APEN) and the approved Operation and Maintenance Plan are included in Appendix L The operating and maintenance plan shows the level of detail that will take place for monitoring dust and maintenance of mitigation controls on site. Scott Pit February 09 D-23 RECLAMATION PLAN EXHIBIT E 1. General Reclamation Plan Mining Area 1 has 7.1 acres of reclaimed area and Mining Area 2 has 13.9 acres of reclaimed area. Prior to mining, the site existed as irrigated field, riparian, and wetland areas. As much as possible, the wetland and riparian areas will be avoided during mining. Most areas disturbed by mining will be reclaimed as lakes or wetlands. Disturbed ground outside the lake and perimeter wetlands will be reclaimed as dry rangeland. Disturbance around the pits will be caused by the installation of topsoil stockpiles, overburden stockpiles, and water handling structures such as berms and ditches. To minimize final reclamation tasks, mining phases will be promptly reclaimed after mining has been completed. See Visual Impact section of mining plan for details. Final reclamation tasks for the pit will include: backfilling Area 2 -Phase 4 and rough grading, final grading of slopes for Scott Expansion Area 2 -Phase 4, topsoiling of Area 2 -Phase 4, and dry rangeland seeding of Area 2 -Phase 4 and wetland seeding of Area 2. No backfilling will take place in the minor wetland footprint within Mining Area 2, since this wetland is disturbed under the US Army Corps of Engineers Tulloch rule which only allows excavation within a wetland. It should be noted that fringe wetlands to be restored far exceed wetland areas to be disturbed. This is part of the plan to offset the value of the riparian areas which will be removed. Because of reclamation considerations and environmental impact mitigation, only a portion of this deposit is being mined. Table E-1 - Permit Disturbed Area Reclamation Acreaies Current Areas (acres) Reclamation Areas (acres) Wetlands 0.1 0.5 Lakes 0 17.8 Roads/Pads 0 4.2 Undisturbed Riparian 0 0 Dry Rangeland 25.1 2.7 Total (disturbed area) 25.2 25/ Scott Pit February 09 E-1 It is uncertain if the pit will receive imported fill materials from job site in the area. If this occurs, extra fill will be used to create wetland shelves as shown on Map F-2. The CDOW has encouraged this practice, and we will make the best effort to provide the wetlands. The calculations of Table E-1 do not assume that wetland shelves will be created. Map F-1 (Reclamation Plan) also does not show wetland shelves. Fringe wetlands will be created on all lake shores. 2. Earthwork Plan Mining highwalls will be kept at near vertical until approaching within 30 feet of the mining limits. The slope will then be laid back to the 2H:1V slope seen on Map C-2. The slopes will then be backfilled with either overburden or excess topsoil to create the final 3V:1H slopes. These slopes will vary somewhat as desired by the CDOW, but they will not be less them 3H:1 V. If additional overburden, topsoil or fill is available, wetland shelves may be created as shown on Map F-2 to enhance wildlife. To minimize final reclamation tasks, slopes will be backfilled promptly after mining is complete in that area. 3. Re-Topsoiling Plan Topsoil will be replaced in all disturbed areas to a minimum depth of 12" except the underwater areas. It is expected that more than 12" of topsoil will be available due to the lake areas not needing topsoil. If this is the case, additional topsoil will be placed in the disturbed areas. The topsoiling will occur to five feet below the expected water table. 4. Revegetation Plan The site will be revegetated promptly using the plans below. Two planting lists will be used for the site. They are divided into dry rangeland and wetland. The dry rangeland plan will be used for any disturbed areas more than 2 feet above the static water table. Seeding will occur the spring or fall immediately after topsoil placement. In areas that include slopes leading down to the predicted static water table, the slopes will be seeded to the edge of the topsoil. This will be approximately 5 feet below the predicted water surface. This will prevent erosion issues. Once the lake is allowed to fill, the shores and shelves will be seeded with the wetland mix. Scott Pit February 09 E-2 Dry Rangeland The following seed mix is recommended for the upland dry rangeland areas. After regrading, the reclaimed area should be tilled. The seed mix can then be broadcast or drill seeded and mulch applied over the seeding. The mulch will be crimped in at a rate of 1.5 tons/acre. Only certified weed free mulch will be used. Species Lbs/acre Seed, PLS Palome Indian Ricegrass 6.0 Ephraim Crested Wheatgrass 3.0 Canbar Canby Bluegrass 1.0 Sodar Streambank Wheatgrass 3.0 Canada Wildyre 2.5 Slender Wheatgrass 2.5 Fourwing Saltbush 0.3 Rabbitbrush 0.3 Skunkbush Sumac 0.3 Total 18.9 Wetland The following seed mix will be used in the wetland areas. This seed mix should be hand -raked into the soil and covered with mulch, avoiding the compaction of mechanical equipment. The mulch will be crimped in at a rate of 1.5 tons/acre. Only certified weed free mulch will be used. Tublings or cuttings will also be planted along all lake edges. Cottonwoods, willow, sumac and buffalobeny will be planted in clumps of 10 to 15 trees with the trees spaced about 8-10 feet apart. The clumps will be about 100 to 200 feet apart. Approximate clumps can be seen in the Reclamation Maps. The seed mix is given below. Species Lbs/acre Seed, PLS Nebraska Sedge Hardstem Bulrush Beaked Sedge Alkali Bulrush Canada Wildrye Slender Wheatgrass Total 13.0 Scott Pit February 09 E-3 1.0 4.0 1.0 2.0 2.5 2.5 5. Post Reclamation Use Most of the future site's use will be recreation and wildlife habitat. The lakes will be used primarily for wildlife habitat with some fishing and boating recreational use. The lakes will be allowed to regularly interact with spring flows, providing native species backwater breeding areas. The areas surrounding the lakes will primarily be used as wildlife habitat. Most surrounding riparian areas will be left undisturbed in order to provide quality wildlife habitat. Those riparian areas, which have been disturbed, will be planted as dry rangeland. This will provide forage areas for wildlife. To further offset the loss of trees, cutting and sapling planting is planned for the new wetland areas. The re -seeded dry land areas will also be allowed to be naturally overtaken by the riparian areas. See Map F-1. The wetlands and lakes, will make this aosp itive visual impact at the entrance to Rifle. See Map F-3, which has an aerial view of the current site compared to the reclaimed area with planned features Two gas well pads are also currently permitted for the site, as shown on Map C-2. The mine reclamation plan will leave these small areas accessible and graded, but no topsoil will be applied to the pad surfaces. Once the wells are depleted, these pads will be reclaimed according to the rules of the Oil and Gas Corrunission. These areas are part of the 5.07 acres shown in the Reclamation Areas table as Roads/Pads. 6. Post Reclamation Drainage In general, all slopes of the disturbed ground will be sloped to direct runoff into the lakes. The culverts passing under I-70 carrying storm water and return irrigation will be allowed to enter the lakes as well. The settling ponds along the river buffer will be modified to allow water to flow into and out of the lakes freely. This will remove the issues associated with non-native fish species and provide backwater breeding areas preferred by the native species. 7. Mosquito Control This lies within a currently mosquito controlled area of the County. Therefore it is already inspected and treated when necessary. To aid the prevention of mosquito infestation, the areas of Scott Pit February 09 E-4 shallow ponding that do not occur within the proposed lakes will be graded to reduce potential breeding areas. Unfortunately, the desirable wetland shelves will be the primary mosquito control issue. These areas will be included in the mapping done by the mosquito control group for the area. The operator is committed to cooperating with the control group to insure minimal issues regarding mosquito control. 8. Revegetation Success Criteria Wetland Fringes The wetland revegetation will be deemed adequate when the vegetation has been established in order to control erosion, noxious weeds are not present in any significant amounts and a healthy stand of wetland plants exist with reasonable diversity as determined by the DRMS. County officials will be notified of any bond release inspections and will be invited to attend and provide input. Dry Rangeland The dry rangeland slope revegetation will be deemed adequate when the vegetation has been established in order to control erosion and noxious weeds are not present in any significant amounts as determined by the DRMS. County officials will be notified of any bond release inspections and will be invited to attend and provide input. Monitoring Reclamation Success Monitoring the reclamation on an ongoing basis will help to assure successful reclamation. If minor changes or modifications are needed to the seeding and reclamation plan, revision plans will be submitted to the DRMS and the County as required. It is hoped that the DRMS and County will provide assistance in evaluating the success of the ongoing reclamation process. All areas disturbed and reclaimed and any other important items regarding the reclamation will be submitted in the annual reports to the Division and County. 9. Final Reclamation Timetable Because of the concurrent reclamation of the site, the final reclamation tasks will be fairly limited. All of Mining Area 1 will be fully reclaimed within six months of mining termination in the area. All of the earthwork, topsoiling, and dry rangeland revegetation will be completed in Scott Pit February 09 E-5 Phases 1, 2, and 3 of Mining Area 2 during mining. The task to be completed at the end of mining at the Scott Pit will be backfilling of the pit highwalls in Phase 4 of Mining Area 2, topsoiling the remaining disturbed areas, revegetation of the remaining dry rangeland areas and all wetland seeding/planting for Mining Area 2. The following table shows the final tasks and their anticipated duration. Final Reclamation Timetable Task Description Duration (Months) Re -grade Final Slopes of 0.25 Area 2 -Phase 4 Topsoil Disturbed Area 0.10 of Area 2 -Phase 4 Disc Topsoiled Areas of Area 2 -Phase 4 and Wetland Fringe 0.10 Seed and Mulch Dry 0.25 Rangeland Arca of Area 2 -Phase 4 Seed Wetland Areas of 0.25 Area 2 Total 0.95 10. Long Term Reclamation and City of Rifle Commitments Both the land owner and United Companies commit to working with the City of Rifle throughout the life of this operation and beyond to insure that the City's water intake is not affected by the activities on the Scott Pit site. United is working with the City of Rifle on the details of this plan, as part of their Watsershed Permit. Scott Pit February 09 E-6 RECLAMATION PLAN MAP EXHIBIT F Map F-1 the final contours of the reclaimed area as well as the final land use. Map C-2 corresponds to the same area during mining. Map F-2 shows details of the wetlands fringes that will be apart of the reclamation plan, and the design of wetlands shelves if they are constructed. Map F-3 shows an aerial photo of the original site compared to the same view after reclamation. Scott Pit February 09 F-1 WATER INFORMATION EXHIBIT G 1. Surface Water The pits from this operation lie on the south side of the Colorado River. All pits will be allowed to fill once mining and reclamation has been completed. Controls for both surface and groundwater are included in this plan. Surface water exists in two forms in this pit. The river runs to the north of the Scott Pit. A minimum buffer of 100 feet will be maintained between the river and all top edges of mining areas. This buffer will provide a sufficient safety factor against river capture, since there is no outside bend of the river through this area which could be erosive. The Huddleston -Berry report in Appendix E confirms this. The second form of surface water will be storm and process water discharge. Substantial water will be discharged throughout the mine life. Pumping will occur continuously for the life of the mine. Pumping will occur in at least one of the mining areas of the Scott Pit. At times, two areas may be pumped to provide access to both. Pits will be pumped by allowing water to drain through dewatering trenches located around all or portions of the pit perimeter. Gravel filters may be used in these trenches to reduce sediment prior to pumping. Water will discharge into the Colorado River from Mining Area 1 and into the oxbow channel wetlands from Mining Area 2. The discharge into the wetlands will help offset the water draw down caused by the pit dewatering. All planned discharge points will be included in the storm and process water discharge permit. This permit strictly regulates the pit discharges and it is required that total suspended solids in the discharge be 35-70 milligrams per liter which is much lower than the River is, which can flow in the hundreds and thousands of milligrams per liter during spring thaw and rain events. The following scenario is the expected dewatering plan for the Scott Expansion. This plan may change due to unexpected hydrological conditions. Scott Pit February 09 G-1 Dewatering trenches will be dug in order to lower the pit's water table. Water will be pumped from the ditches through the gravel berm filter to the Colorado River. Trenches will progress both outward and down during the mining area's life to the ultimate limits shown on Map C-2. Once mining has been completed or slightly before mining has been completed in Mining Area 1, dewatering will begin on Mining Area 2. Dewatering trenches will be installed similar to Mining Area 1. Throughout the life of Mining Area 2, the dewatering pump will discharge into the oxbow channel's surrounding wetlands. Once mining has neared completion in Mining Area 2, Mining Area 1 will be fully reclaimed and thus allowed to fill with water. Once all mining and reclamation have been completed, all pits will be allowed to fill. Gravel Well Permits and Substitute Water Supply Plans have been approved for the original permit area as well as the Scott Expansion and are included in Appendix H. The Process and Stor nwater Discharge Permit for the site has been submitted, however this plan will need to be modified due to the significant modifications that have occurred. It is understood that the Special Use Permit will not be granted until this permit has been submitted to the County. 2. Ground Water Due to the close proximity of the pits to the Colorado River, the ground water table will be very high. It is also believed that a major contribution to the oxbow's water is passing under I-70. This water is believed to originate from irrigation of fields to the east and south. The expected water table depth lies from 3-8' below the surface. This height will vary depending on the seasons. One well lies within 600' of the expansion. This well is located at the home within the permit area. It will be removed during the mining operation. 3. Watershed Permit Due to the pit being near the City of Rifle old water intake, a watershed permit issued by the City of Rifle is required. The latest version of the watershed permit is being submitted to the City basically concurrent to the County submittal. The jurisdiction of the permit is limited to water quality and protection of their structures. A copy of the permit application is included in Appendix E. Scott Pit February 09 G-2 4. Gravel Well Permit and SWSP A gravel well permit and Substitute Water Supply Plan (SWSP) have been approved for this site. They are included at the end of this Exhibit. The Augmentation Plan has been filed in the appropriate Water Court. Information on the acceptance of the plan is submitted in Appendix H. 5. Potable and Sanitary Water Supply Potable water will be brought onsite in the form of bottled water. Portable toilet(s) will be brought onsite by a service provider for the plant facilities area. This is similar to most pits in the area. A small 500 gallon tank will be buried near the portable office for a toilet inside the office. Scott Pit February 09 G-3 WILDLIFE INFORMATION EXHIBIT II The proposed expansion area consists of irrigated pasture, riparian habitat, and wetlands. The current land use is pasture and wildlife habitat. The irrigated pastures provide very little wildlife habitat, except for deer and elk grazing. However, these areas are not heavily used due to the close proximity of 1-70. Wildlife is most commonly observed in the riparian and wetland areas. The major riparian area is the center of the old river oxbow. This area has been used by both wildlife and cattle. However, substantial non-native species infiltration can be seen in this area, which slightly degrades the site's habitat potential. 1) Significant Game Resources on the Affected Lands Big game species potentially occurring on this site include mule deer, white-tailed deer, and American elk. Mule deer are the most common big game species found on the site. White-tailed deer and elk occasionally visit the site. Mule deer occur on the site throughout the year, typically concentrating in the lush native vegetation near the river and in the oxbow area. This area provides important mule deer winter habitat and a good source of food. It should be noted that the areas within 100' of the river and the area within the oxbow will not be disturbed. Upland game birds potentially occurring on the site include ring-necked pheasant, mourning dove, and turkey. These species prefer mountain brush and riparian habitats. Again it should be noted that within the oxbow and areas within 100' of the river will be left undisturbed in order to provide a buffer against river capture as well as to maintain high quality riparian habitat. These areas will also be improved by removing undesirable species such as knapweed, tamarisk and Russian olive. The Colorado River and its floodplain and wetlands provide habitat for breeding and migrant waterfowl. Waterfowl likely to occur on the site includes: Canada geese, common and red breasted mergansers, gadwall, American widgeon, mallard, green -winged teal, blue -winded teal, cinnamon teal, northern shoveler, pintail, redhead, canvasback, lesser scaup, common goldeneye, Barrow's goldeneye, bufflehead, and ruddy ducks. Scott Pit February 09 H-1 The only small game species occurring on the project site is the Nuttal's cottontail rabbit. This species occurs mostly in shrubby vegetation and within the riparian habitat. The cottontail and various rodent and ground squirrel species on the site are prey for raptors and other predator species in the area. Predators and other furbearers likely to occur on site include: American beaver, muskrat, mink, ermine, badger, raccoon, red fox, and coyote. Beaver, raccoon, and coyote tracks have been observed on the site. 2. Significant Non -Game Resources on the Affected Lands The project site provides habitat for a diverse array of breeding and migrant bird species. It also provides habitat for raptors as well. Thirteen species potentially occur in the area based on the CDOW Wildlife Resource Information Service. They include: bald eagle, golden eagle, Swainson's hawk, red-tailed hawk, rough -legged hawk, northern harrier, merlin, American kestrel, Cooper's hawk, sharp skinned hawk, northern goshawk, great -horned owl, and long- eared owl. Many of these species are infrequent spring and fall migrants that occasionally pass through the Colorado River Valley. American Kestrel and Coopers hawk are most commonly seen on the site. An on-site inspection in the fall of 2003 revealed no potential or active raptor nests. However, dense riparian areas provide good potential nesting sites. It should be noted that the areas within 100' of the river and within the oxbow will not be disturbed, therefore keeping much of the high quality riparian area intact. A bald eagle's nest has been located to the northeast of Mining Area 2 for the past few years. The nest is very near the previously active Lafarge Mining (Mamm Creek Pit) operation. In fact, the eagle pair moved into the site after La Farge started mining. They have returned over the past few years and have raised young at the nest in each of those years. The Mamm Creek Pit is no longer in operation as an active mine. The eagles at this site constructed the nest after industrial operations had begun at the neighboring Lafarge pit. In 2007, the bald eagle has been removed from the Endangered Species List, and USFW confirmed this ruling. During a meeting with Will Spence, local wildlife specialist of the CDOW, we proposed mitigation practices that would lessen the impact on the eagles, whose nest is located within the 1/2 mile radius of the nest but primarily outside the 1/4 mile radius of the nest. See Map C-2. These items are shown in detail below: Scott Pit February 09 H-2 1) The small area of approximately 2 acres of Mining Area 2 that lies within the 1/4 mile ring of the eagle nest can be mined during the non sensitive time frame of 6 months of one year and reclaimed in the second year. Although we strongly believe we only need this time to complete these operations, we would like one extra time frame of 6 months to make sure no unforeseen issues arise. The actual dates of the 6 month periods should be set by CDOW. After this time, there would be no future activity in that area. 2) This area will also be mined from the bottom of the pit to the northeast, further lessening disturbance to the eagles and other wildlife. This depth will be approximately 25 feet below the existing surface. See attached revised Map C-2 Mine Plan. 3) An undulating topsoil berm of 3-5 feet height can be placed along the eastern edge of Mining Area 2 to further lessen impacts to the eagles and other wildlife. 4) All other timing commitments in the current plan will be maintained. 5) The proposed seed mix for the wetlands and the dryland areas is enclosed in the reclamation plan. Please let us know if you would like to see any variations in the species list which would enhance wildlife. 6) The current plan for the lakes show undulating shorelines in most of the edge lengths. We will evaluate our topsoil and overburden handling volumes to see if any additional undulations are possible. Since this meeting in March of 2008, the eagles nest has been blown down by wind although it appears they are rebuilding the nest. United still commits to all items outlined above, provided that the eagles decide to rebuild the nest and use it. We have worked extensively with Will Spence of the CDOW on the mitigation of our current plan. His response to our commitments is enclosed on the following pages. Scott Pit February 09 H-3 STATE OF COLORADO Bill Ritter, Jr.. Governor QEPAR.TtltENT OF NATURAL RESOURCES DIVISION OF WILDLIFE !W EQUAL OPpoR EnnTYEMPLaren Threes E. Remington, D iract*r 6060 Broadway Denver, Calmed* 80216 Telephone_ (W3} 287-1182 mk/ie.siale.co.us June 18, 2008 Peter) Siegmund Vice President United Companies 2273 River Road PO as 3609 Grand function, CO 81502 070243-4900 RE: The Unite d Companies' Scott Gravel Pit Revision Plan Mr, Peter Siegmund, fart* IrorWildlrjr- For People You and Greg Lcwitki (net with District Wildlife Manager, Will Spence, a couple months ago regarding the Scott Pit and a new development plan. You asked the CDOW to look at the new plans to determine whether the pit would adversely affect the nearby eagle nest. Greg Lewlckf also provided Spence with further stipulations to the development via e-mail that you will be adding to your proposal when you re -submit ttie plan. It is our understanding that you would like CDOW's recommendation of the project before going through with creating a new submittal to the City of Rifle. The new mining plan would be better than the first plans In that there will be a lot of good habitat preserved that was originally planned to be mined. The oxbow is now removed from the mining plan which is an Important habitat area for the eagles as well as various other waterfowl, raptors, Songbirds, and mammals, The e-mail additions to the plan submitted by t.ewicki call for undulating shore lines on the resulting lakes, use of fill material if available In creating shallow shelves around the edges, leaving some structures such as the access read into the pit that will also provide shallow water, and creating a berm with the loft soli that will act as a visual and sound barrier between the pit and the eagle nest. The plan calls For mining within the Y mile buffer only when the eagles are away for the season. However, activity including mining, crushing, and an asphalt plant will persist all year within the Y, mile buffer. Spence suggested moving the asphalt plant, crusher, and other facilities to the far west side of the property where it would be out of the Y, mite buffer. The areas closer to the nest (mold be mined while the eagles are absent and operations could move back to the western side while the eagles are present. I1owever, it is apparently irnp©ssible to do so because of flood plain issues. It seems the only place to put the plant is on the east side of the praperty nearer the nest. The buffers are recommendations given by the U.S. Fish and Wildlife Service and the Colorado Division of Wildlife to protect eagle nests statewide, Activity is to be limited tv the "off' season, when the eagles are gone, within the Y mile buffer. There is to be no activity within the Yt mile buffer. Both the CROW and the 1i51 WS recognize that this particular pair of eagles seems to be more tolerant to disturbance than most eagles are. This pair chose the nest site despite the disturbance of I.70, county roads, gravel mining, at residence, and businesses, all within the V mile buffer. However, all wildlife species have a threshold of disturbance. They can adapt to or put up wills disturbance up to a certain level. When that threshold is reached they will leave the area. Where DEPARTMENT OF NATURALRESCURCES. Harris D. Reiman, Exec:alio Director VVILDUFE COMMISSION. Robert Bray. Char I grad Coors. Vice Chair *Tim Glerrs, Secretary Mens, Deru+Es ButeN_r • Jefrray Cravrracd • Dorothea F rrh • Roy McMatli * Rizhaird Ray • Hobert 5freetor Ex Officio Members. }-tufa mermen and John Skip Scott Pit February 09 H-4 that threshold is for this particular pair of eagles Is uncertain. At some point they will probably decide that there Is tea much activity and either abandon the nest during breeding and nesting season or simply deride to move to a new location when they migrate back for breeding season. At that point some activity must be held responsible for finally breeching the threshold of disturbance. Because these particular eagles are 5o tolerant to the disturbances around their nest it is probable that the Scott Pit could be mined according to the proposed plan without causing them to leave the nest site, The reclamation plan will result In good habitat for the eagles and other wildlife. However, there is def riltely a risk that the eagles will not tolerate the new disturbance. MOW cannot recommend the mining operation because of that possibility. If mining operations go according to the plan and the Scott Pit is determined to be the muse of the eagles abandoning the nest then United Companles would be liable for taking of the nest and subject to legal and possibly civil actions. The CROW will stick to the buffer recommendations as those recommendations are known to provide a safe zone for nesting, please note that the buffers are simply recommendations. CROW is not stating that the alining operation cannot be accomplished without disturbing the eagles. However, the risk of disturbing the eagles remains the responsibility of the company. When the new mining plan is finished or In draft stago the CDOW would appreciate the opportunity to take another look at it and determine If there Is anything else that can be done to minimise impact to the eagles or aid In developing a successful reclamation plan. if you have any questions please sail District Wildlife Manager, Will Spence, at (970)985-5882, Siiticerel J - JT Rurnatzke -- Acting Area Wildlife Manager cc. M. Xcnishi, Vclard; Broderick, Fetch, Ktutc, File Scott Pit February 09 H-5 3. Seasonal Use of Affected Lands The pasture land and riparian areas provide good cover and forage throughout the year. Also through the addition of ponds and fringe wetlands to the area during and after reclamation, the site will serve as superb migratory waterfowl habitat. 4. Presence and Estimated Population of Threatened or Endangered species in the area. No threatened or endangered species are present in the area. 5. Endangered Fish The beginning of the reach for critical habitat for fish lies approximately 2 miles down stream from the site, and continues downstream to Grand Junction. The operation will not affect the River downstream in any way, since all runoff and discharge will be carefully regulated and water loss from evaporation will be offset by reducing consumption by irrigation. 6. Fish Resources Only 14 species of fish are native to the upper Colorado: the Colorado pikeminnow, bonytail, humpback chub, razorback sucker, Colorado River cutthroat trout, Rocky Mountain whitefish, roundtail chub, speckled dace, Kendall Warm Springs dace, flannelmouth sucker, mountain sucker, bluehead sucker, mottled sculpin and the paiute sculpin. However, there are numerous non-native species of fish competing for habitat. Down river is the start of the endangered species habitat for the Colorado pikeminnow, razorback sucker, bonytail and humpback chub. Prior to stocking fish in the reclaimed lakes the landowner will consult the CDOW for guidance. 7. General Effects of' the Operation on the Existing Wildlife of the Area The change in impact can basically be described as a lessening of habitat for big game and small mammals due to reduction in riparian and pasture areas and an increase in waterfowl habitat due to the increase in wetlands and water areas. The portion of the site which lies to the south of the river has not been mined; however the site is surrounded by I-70, Lafarge's Marnm Creek Pit, and the Colorado River. It should also be noted that along the entire stretch of river bordered by Scott Pit February 09 11-6 the Scott Pit mining has occur ed along the northern shore. Migrating animals will probably avoid the site, but the proposed pit does not block any known migratory routes, and wildlife should be able to move through the area unimpeded. Due to the possibility for animal/vehicle collisions, hauling activities will probably pose the biggest threat to wildlife. Haul trucks should keep to posted speeds and drivers need to remain aware of the potential for collisions. Gravel extraction and crushing activities will no doubt create some disturbance to animals near the site. The eagle issue is discussed earlier in this section. Scott Pat February 09 H-7 SOILS INFORMATION EXHIBIT I Soils at the site appear to be as represented on the current NRCS map. Test holes have been dug on the site to determine topsoil, overburden and gravel depths. These can be seen in the mining section. The soil types for the permit are listed below. They are also shown on Map C-1. Soil Identification Soil Description 65 Torrifluvents This broadly defined unit consists of deep, well drained to somewhat poorly drained, nearly level soils on flood plains adjacent to the Colorado and Roaring Fork Rivers and their major tributaries. Slope is 0 to 6 percent. The soils formed in alluvium. These soils are stratified and vary widely in texture and depth. The surface layer ranges from loamy sand to fine sandy loam to silty loam to clay loam. The underlying layers are generally sandy loam or loam stratified with sand, gravel, and cobbles. In some areas gravel and cobbles are on or near the surface. 27 Halaquepts This broadly defined unit consists of deep, somewhat poorly drained to poorly drained, nearly level and gently sloping, salt -affected soils in narrow foothill valleys, on fans, and on low terraces. Slopes are 0 to 6 percent. These soils formed in alluvium. The soils are extremely variable. The upper 24 inches ranges from loam to clay, and the underlying layers are generally gravelly. The soils are commonly gleyed from the surface down. Stratified sand, gravel, and cobbles are at a depth of 24 to 40 inches. In some areas, gravel and cobbles are at or near the surface. 72 Wann Sandy This deep, somewhat poorly drained, nearly level to gently sloping, low Loam lying soil is on terraces and bottom land in valleys. Elevation ranges from 5,00 to 6,500 feet. The soil formed in alluvium derived primarily from sandstone and shale. The average annual precipitation is about 12 inches, the average annual air temperature is about 48 degrees F, and the average frost -free period is about 120 days. Typically, the upper part of the surface layer is dark grayish brown sandy loam about 8 inches thick, and the lower part is dark grayish brown fine sandy loam about 4 inches thick. The upper part of the underlying material is mottled, light brownish gray fine sandy loam and sandy loam about 24 inches thick, and the lower part is mottled light brownish gray coarse sandy loam to a depth of 60 inches. Scott Pit February 09 1-1 40 Kim Loam This deep well drained, gently sloping soil is on alluvial fans and benches. Elevation ranges from 5,000 to 6,000 feet. This soil formed in alluvium derived from shale an sandstone. The average annual precipitation is about 12 inches, the average annual at temperature is about 46 degrees F, and the average frost -free period is about 125 days. Typically, the surface layer is yellowish brown or light yellowish brown loam about 17 inches thick. The underlying material is light brownish gray loam to a depth of 60 inches. In places the underlying material is stratified with fine sandy loam. Scott Pit February 09 1-2 VEGETATION INFORMATION EXHIBIT J 1. Site Vegetation The Scott Pit can be divided into two principal vegetation areas: Riparian and Irrigated Field. The riparian area can easily be seen on Map C-1. The oxbow and areas just outside the river bank are dominated by the large cottonwood trees and other riparian vegetation. Other non - noxious weed species include: willows, water -tolerant grasses and occasional sedges and rushes. Unfortunately the previous landowner overgrazed the riparian areas. This weakened the native plants allowed a significant knapweed infestation to occur. Also, as is common in along the Colorado River, the banks are overrun with tamarisk and Russian olive trees. The irrigated fields shown in Map C-1 have been left fallow. This has allowed the infestation of knapweed to spread. The fields still include some of the intended grass species but have been primarily overtaken by the knapweed. Due to this significant weed issue, the weed plan developed for the site is split into two categories. Initial weed treatments will be much more intensive than the maintenance treatments. It is anticipated that the intensive treatment will be occur over the first one to two years of the operation. Jurisdictional wetlands also exist in the permit area, as shown on map C-1. The delineation of these areas has been approved by the Corps of Engineers. The mining area has been curtailed so that a bare minimum of wetlands is encountered. In the proposed plan, the only wetland to be affected is a small narrow wetland along a man made ditch located in Mining Area 2. This wetland totals 0.19 acres. See Map C-2. This area will be completely excavated under the Tulloch Rule of the US Army Corps of Engineers. No individual or nationwide permit is needed for this activity. No fill will be placed in this area. Also, considerably more wetlands will be created as a result of the reclamation of this operation. Scott Pit February 09 J-1 2. Initial Weed Treatment Program The principle weed locations shown on Map C-1 will be treated using the following program. The intent of the program is to reduce the noxious weeds for the site to approximately 10% of the current infestation. The remaining portion will be treated through annual maintenance treatments. Noxious trees will be cut down or uprooted to remove them from the area prior to mining activity. They will then be burned or removed from the site to an approved disposal location. The trees will be cut near to the ground. Total removal of the stump is not planned for a majority of the site. This is to ensure bank stability that could be compromised by the removal of the root ball. Trees which lie within mining areas will have the entire root ball removed during stripping operations. Regrowth from the stumps is anticipated. This regrowth will be treated by spraying the young saplings. This technique has been used at other wet pit sites with good success. To lessen the overall visual impact from the removal of the noxious trees, the removal may occur in phases. The initial phase would include all trees surrounding Mining Area 1 and any access road areas within the entire permit. Subsequent phase(s) would progress in the same order as the mining phases The substantial knapweed infestation will be treated through spraying. The irrigated fields will be spot sprayed. It is less densely infested and still contains some desirable species. The oxbow will require more area wide spraying to control the knapweed. Fortunately the oxbow area will not be disturbed as part of this operation. This will allow for more complete removal of the infestation. Mining Area 1 will be sprayed immediately. This will allow stripping operations to be initiated. The other areas will be sprayed in the fall to maximize potential benefit. The following spring the site will be inventoried again prior to treatment. It is anticipated that the densely invest oxbow will require 1-2 years of treatment before the knapweed is completely controlled. Once this achieved the weed plan will transition to the maintenance plan. 3. Weed Maintenance Pian After the initial intensive weed treatment the site will continue inventorying and treating weeds onsite. Each mid-April, a noxious weed survey will be made of the permit area. If any noxious Scott Pit February 09 J-2 weed patches or plants have been identified, they will be sprayed by backpack sprayer or 4 - wheeler using chemicals approved for use by the local Weed Management group in Garfield County. This will be done within 2 weeks after the inspection when the weeds are most vulnerable. Care will be taken to spot spray where possible to avoid killing desirable broadleaf plants. After reclamation of portions of the site and after final reclamation, weed surveys and spraying will continue until the perennial cover and production of the site have met DRMS requirements and bond release has been obtained. The plan does not contemplate total weed removal on the property, especially the removal of some non -noxious weeds. Past experience shows that some initial weed cover in the first year following retopsoiling is beneficial to the reclamation effort in dry range sites. Weeds tend to provide shade for new grasses, are a means of holding snow on the seedbed longer and protect it from wind and water erosion until the planted species gradually take over the site. Scott Pit February 09 J-3 FLOODPLAIN PERMIT EXHIBIT K L HYDRAULIC ANALYSIS Almost all the analysis provided in this section has been performed by or under the direction of Peggy Bailey, P.E. of TetraTech's Breckenridge, CO office. A hydraulic analysis is conducted to evaluate the effects of the two mining pits on the 100 -year floodplain of the Colorado River. In addition, a new floodway, as defined by the Federal Emergency Management Agency, is calculated and delineated on Map F-1. Note that the calculations indicate the modified flood elevations, under post mining conditions, will not increase when compared to the flood elevations determined under existing conditions and, in areas adjacent to the proposed gravel ponds, is actually lower than existing conditions. This exhibit presents the study results. The study reach begins at cross section 53.516 (K) of the effective FEMA model and extends upstream for 8,350 feet. Scott Pit is located 1,140 feet upstream of Section 53.516 (K) and extends approximately 4,100 feet along the left or south bank of the channel. Sixteen cross sections are used on the hydraulic analysis. A station centerline is established along the channel centerline. 1.1 Existing Conditions The existing study reach includes a wide, relatively flat floodplain bench bound by Interstate 70 to the south and the railroad line and Highway 6 to the north. The Colorado River runs through this section, from east to west, in a relatively straight alignment. Previous land uses include gravel pit mining in the north overbank, and agricultural uses on both the south and north overbanks. There are three existing gravel pit ponds within the study reach, located along the right (north) overbank. Two of these ponds include water intakes for the City of Rifle. There are also several abandoned buildings located along the north overbank. The north overbank includes a dike or levee which was probably constructed with the gravel pits. The south overbank appears to be in a more natural state with limited disturbance due primarily to agriculture and grazing. Scott Pit February 09 K-1 The channel banks are lined with a mixture of materials including river cobble, some riprap and concrete pieces. The south overbank is moderately vegetated with weeds, grasses, cottonwoods and willows. An existing conditions, or pre -mining site plan is shown on Map C-1. Topographic mapping for existing conditions was completed in 2006, covering the above -water areas, including islands and overbanks up through cross section 10 (Map F). For cross section 11, the above water topography is taken from Topo Depot, an electronic AutoCAD file of USGS topo maps. Below water cross sections were surveyed in the spring of 2007. Cross section geometry for the hydraulic analysis is based on a combination of the below water surveys and the above water topographic mapping. Of the ten cross sections that were surveyed, all were used directly as input to the HEC -RAS file. In addition, cross sections were interpolated between surveys to add interpolated cross sections were needed. Benchmark elevations are based on NGVD 1929 datum, consistent with the previous floodplain analysis and Effective Mapping. 1.2 Proposed Conditions Two new ponds will be created along the south overbank of the project reach as a result of the gravel mining operations. These ponds are located within the existing, `effective' floodway and as such will be constructed without levees or dikes for flood control. This is being done at the request of the County, which desires to limit the gravel operations to activities of excavation only. Proposed grading and the site plan layout are shown on Map F-1. 2.0 HYDRAULIC MODELING Detailed hydraulic modeling is performed to determine the effects of the proposed modeling on the 100 -year flood water surface elevations. Detailed model results and presentation can be found in the application for the CLOMR which has been approved and is not included in this County Special Use Application. The following is a brief summary of results. Scott Pit February 09 K-2 2.1 Existing (pre -mining) Conditions The study reach begins at cross section 53.516 (K) of the effective model and extends for approximately 8,350 feet. A total of 10 field surveyed cross sections are utilized for this analysis. Additional cross sections were interpolated between several of the surveyed cross sections. Cross section locations are shown on Map F. Hydraulic parameters for the existing (pre -mining) model are presented in Table 2.1.1. Calculated water surface elevations are presented in Table 2.2.2. Table 2.1.1. Hydraulic Parameters for Existing (Pre -mining) Conditions Model Parameters Values Manning's N value-overbanks 0.065 Manning's N value -channel 0.04 Expansion coefficient 0.3 Contraction coefficient 0.1 Starting water surface elevation, section 53.516 (K) Flow regime 5309.67 Subcritcal Existing dikes, or levees, are located on the right (north) banks from approximately station 49+70 to 80+00, between the main channel and the existing gravel ponds. These dikes, which run parallel to the channel, have not been certified as regulatory levees and as such are not modeled as levees. The hydraulic modeling assumes that the levees are ineffective at retaining flood flows and water is allowed to extend inland beyond the dike. The flow areas across the existing ponds are modeled with the ineffective flow area option in HEC -RAS. The elevation of the ineffective flow (above which the flow becomes effective) is set at the elevation of the downstream top of bank which controls the pond water levels under flood conditions. Scott Pit February 09 K-3 2.2 Developed (post -mining) Conditions Proposed conditions are shown on Map F, including proposed grading for the overbank areas. No channel reconfiguration is proposed nor will any levees be constructed. All proposed re- grading is at or below the existing ground elevations. Geometry is developed for cross sections 1 through 11 to reflect the proposed ponds. Overbanks will be revegetated with native plants and grasses and are assumed to return to the same or similar conditions as existing. Thus Manning's N values for the overbanks are set to be equal to those under existing conditions. Hydraulic parameters for the developed (post -mining) model are presented in Table 2.2.1. Calculated water surface elevations are presented in Table 2.2.2 which also includes a comparison of existing versus proposed water surface elevations. Table 2.2.1. Hydraulic Parameters for Developed (Post -mining) Conditions Model Parameters Values Manning's N value-overbanks 0.065 Manning's N value -channel 0.04 Expansion coefficient 0.3 Contraction coefficient 0.1 Starting water surface elevation, section 53.516 (K) 5309.67 Flow regime subcritcal Scott Pit February 09 K-4 Table 2.2.2. Existing and Proposed Modeling Results Cross Section 100 YR 1211SEL..(ft) FEMA': Eifecti�e EXisting Proposed Difference' K 5309.67 5309.67 5309.67 0.00 1 5312.80 5312.80 0.00 L 5313.15 1.1 5314.70 5314.75 0.05 1.2 5315.46 5315.27 -0.19 M 5316.02 2 5316.53 5316.04 - 0.49 N 5317.16 3 5318.05 5317.86 -0.19 4 5318.27 5318.11 -0.16 0 5318.20 5 5318.70 5318.70 0.00 6 5320.33 5320.04 - 0.29 7 5321.50 5320.42 - 1.08 8 5322.85 5322.17 - 0.68 9 5323.58 5323.28 - 0.30 9.5 5323.80 5323.54 -0.26 10 5324.12 5323.93 - 0.19 10.5 5327.17 5327.17 0.00 11 5329.53 5329.53 0.00 3.0 FLOODWAY ANALYSIS In addition to the floodplain analysis, a new floodway is defined across the project reach. This floodway generally encompasses the 100 -year floodplain on the south side of the river through the proposed project area. Downstream of the project, the floodway is defined to match the existing floodway boundaries, transitioning immediately upstream and downstream of the permit area. On the north side of the river, where the study reach is on property owned by Rifle, a slightly narrower floodway is defined at the request of the City, in order to remove the water diversion ponds from the floodway. All elevation changes are at or below 1.0 feet in compliance with FEMA criteria. A summary of the floodway encroachment is provided in Table 4.0.1, below. Scott Pit February 09 K-5 Table 3.0.1. Floodway Data Cross. Section . Base""Flood WSEL (feet"NGVD) Width (;ft) Regulatory Without Floodway Floodway Increase K 620.00 5309.67 5309.67 5309.67 0.00 1 690.00 5312.80 5312.80 5313.80 1.00 1.1 1040.00 5314.75 5314.75 5315.37 0.62 1.2 1120.00 5315.27 5315.27 5315.79 0.52 2 1695.00 5316.04 5316.04 5316.43 0.39 3 1525.00 5317.86 5317.86 5317.99 0.13 4 1506.00 5318.11 5318.11 5318.35 0.24 5 1590.00 5318.70 5318.70 5319.08 0.38 6 1723.00 5320.04 5320.04 5320.39 0.35 7 850.00 5320.42 5320.42 5320.47 0.05 8 750.00 5322.17 5322.17 5322.96 0.79 9 910.00 5323.28 5323.28 5324.14 0.86 9.5 1000.00 5323.54 5323.54 5324.35 0.81 10 1211.00 5323.93 5323.93 5324.76 0.83 10.5 1595.00 5327.17 5327.17 5327.23 0.06 11 1085.00 5329.53 5329.53 5329.53 0.00 4.0 CONDITIONAL LETTER O1 MAP REVISION A Conditional Letter of Map Revision (CLOMR), was prepared and submitted to the Federal Emergency Management Agency (FEMA) in October 2007, and reflects the construction of three gravel pits, extending over a larger area between Pits 1 and 2 now shown on Map C-2. Since the CLOMR was prepared, the mining plan has changed and been reduced to two small pits as presented herein. The hydraulic analyses for both scenarios were compared and found that both scenarios reduce the 100 -year floodplain as compared to existing conditions and that the proposed floodway results in increases at or less than 1.0 feet. Since the CLOMR is not required by FEMA and is considered non-binding, a revised CLOMR was not resubmitted to FEMA. The changes from three ponds to two ponds will be reflected in the final LOMR, which must be submitted after construction is complete. This final LOMR will be based on as -constructed information and reflects the final project configuration. FEMA will then use the final LOMR to re -map the effective floodplain and floodway. This information is verified by the Tetra Tech letters included here. As of the beginning of August 2008, the CLOMR has been approved by FEMA. Their approval letter is also enclosed in this section. Scott Pit February 09 K-6 TETRA TECH P.O. Box 1659 NA. Mail) 4105. French Stmt. 8r dtmnridgt, CO 80424 Tel: 970.453.6394 Fax 970.453.4579 MEMORANDUM TO: Greg Lewicki, Lewicki and Assoc.; Craig Lamberty, United Co. FROM: Paul Schmidt, Tetra Tech RE: Scott Pit, Interim Gravel Pits Effect on Floodway DATE: April 16, 2008 The purpose of this memo is to present the results of the floodplain and floodway analysis conducted for the alternate pit configuration at the proposed Scott Pit gravel mine near Rifle, Colorado. A CLOMR, `Request for Conditional Letter of Map Revision Colorado River at Scott Pit' dated October 2007, was submitted to FEMA which presented changes in the floodplain as a result of gravel mining in three separate pits, see the attached figure. An alternate gravel mining condition is now proposed in which Pit 3 and a portion of Pit 1 will be mined. The remainder of Pit 1 and all of Pit 2 may be mined at a later time. See the attached figure for the alternate mining areas. This memo presents the floodplain elevations and floodway as a result of the alternate mining conditions. In the CLOMR submitted to FEMA, gravel mining of the three pits was modeled using cross sections to represent the 3 mined pits. The results of the analysis indicated that the pits will reduce the flood elevations throughout the study reach. In order to model the alternate mining areas two cross sections are added to the hydraulic model; XS 1.1 and XS 1.2. These cross sections are added to better define the smaller mining foot prints. Adding these two cross sections slightly changed the existing conditions model due to improved `resolution' in this area. However, when comparing the `alternate existing' and `alternate proposed' conditions a decrease in the floodplain elevations still occurs. A summary table is presented below as Table 1. The CLOMR, dated October 2007, submitted to FEMA also presented a revised floodway based on the changes in the floodplain due to the gravel mining in the three separate pits. This floodway is unchanged under the alternate gravel mining condition. Results of the floodway analysis are presented in Table 2. A CLOMR is a hypothetical model based on proposed construction. It is not a binding document nor does FEMA require CLOMRs. FEMA does require a Letter of Map Revision (LOMR) and they are required to be based on as -constructed surveys. Thus, any deviation between the original proposed project and final as -constructed project is accounted for at the time when the LOMR is submitted. Therefore FEMA will not require an updated CLOMR. In the case of Scott Pit, the County can request the CLOMR. In this case, under alternate mining conditions, a decrease in the floodplain elevations still occurs, and the floodway outlined in the CLOMR dated October 2007 is unchanged. Therefore a submittal of a revised CLOMR should not be necessary. P:\PROJECTS - WATER RESOURCES 15251-00E-00 HECRAS Review for Scott PitllnterimPitFWMemo.doe Scott Pit February 09 K-7 Table 1: 100 -Year Flood Elevations EWA 17:- 1111211111 01111111111 ®--- 111031111_- 5314.70 MINIM 111E1111-- 5315.46 MEM -11i1111111 5309.67 5309.67 5312.80 5309.67 5312.80 5309.67 5312.80 M 2 N 3 5316.02 5317.16 5316.28 11111131111 0 5 6 5318.20 1111111111 11111111111111111111 1111111111 1111111111 1111111111 8 9 9.5 10 10.5 5317.94 5318.18 5318.62 5320.33 5321.50 5322.85 5323.58 5323.80 5324.12 5327.17 5329.53 5316.53 0.00 0.00 0.05 -0.19 5316.04 -0.49 --- 5318.05 5318.27 5318.70 5320.33 5321.50 5322.85 5323.58 5323.80 MEM NEMER IlliME11 5317.86 5318.11 5318.70 5320.04 5320.42 5323.28 EWEN 5323.93 5329.53 5329.53 -0.19 -0.16 0.00 -0.29 -1.08 -0.68 -0.30 -0.26 -0.19 0.00 0.00 *Added cross sections for alternate mining conditions Table 2: Floodwa Data 1 2 MIME 6 8 9 9.5 10 10.5 690.00 1040.00 1120.00 1695.00 1525.00 1506.00 1590.00 1723.00 850.00 750.00 910.00 1000.00 1085.00 5312.80 5315.27 5316.04 5317.86 5318.11 5318.70 5320.04 5320.42 5312.80 5316.04 5317.86 5318,11 5318.70 5320.04 5320.42 MERE MEM! 5323.28 5323.54 5323.93 5329.53 5323.28 5323.54 5323.93 5327.17 5329.53 5313.80 5315.79 5316.43 5317.99 5318.35 5319.08 5320.39 5320.47 5322.96 5324.14 5324.35 5324,76 5329.53 1.00 0.62 0.52 0.39 0.13 0.24 0.38 0.35 0.05 0.79 0.86 0.81 0.83 0.06 0.00 *Added cross sections for alternate mining conditions P:IPROJECPS - WATER RESOURCES15251-001-00 HECRAS Review for Scott PiAInlcrimPitFWMemo.do Scott Pit February 09 K-8 mer- ,9✓ 3 .LL Cli � s.- 1 ' . 6`r"te=�O 412!„.,,,,.........„..�"_ � \��1v "� -rte� .�; fa SCOTT PIT due PIT urour ata kl m..., �.� �.. des TETRA TECH REX Flax 16S9 Q)3. Mad) 410 S.French Sec¢t,Sradcenridge, CO 80424 Tel:970453.6394 Fxx_970.453.4579 MEMORANDUM TO: Tim Bunt rock, Case Reviewer FROM: Paul Schmidt, Tetra Tech CO: Greg Lewieki, Lcwicki and Associates Craig Lamherty, United Companies RE: Scott Pit Existing Floodplain, Case No.:08-08-02998 DATE: June 3, 2008 The purpose ol'this memo is to address the slight differences in base flood elevations between the existing FEMA effective floodplain and the existing conditions model used in the Request for Conditional Letter of Map Revision Colorado River at Scott Pit (Case No. 08-08-0299R). Review of readily available information reveals that any differences observed between these two models is the result of a higher -resolution in topographic survey and a greater number across sections used in the study reach. Furthermore, the differences in elevation is not the result oftho placement of fill or other man made changes to the floodplain. A review of aerial images, topograitie mapping, and photographs of the area show that no sienilieant matt made eltanues have been made in the area of the study reach since the original FEMA study was conducted in 1982. The exception to this is the expansion of the gravel mining operations i1n111ediatcly north of tlic Colorado River on the upstream end of the mach which consisted of the excavation of gravel pits. However, no placement of 1111 has occurred anywhere in the study reach. A review of aerial images of 1982, 1989, and 2005 show that no significant constniction or roan made changes have occurred. Aerial topography was collected in 2007 and used to create I' contours. This topographical mapping shows greater detail than the Corps of Engineers mapping produced in 1982 which was used to create the current FEMA effective model. The aerial topography collected in 2007 and the Corps topography from 1982 snatch closely when compared. In addition, ten below water cross sections were surveyed in 2007 and tied into the aerial topography and used to build the existing conditions model submitted with the C:LOMIt, The end result is an existing conditions model for this reach with approximately twice as fenny cross Seel nS and hundreds of more points per cross section when compared to the comm FEMA effective model. Finally, a review of photographs of the area further support that no changes in the arca have occurred evidenced by the presence of large mature vegetation. Through careful review of all of these pieces or information, we strongly feel that the minor differences in the current FEMA effective base flood elevations and the existing conditions model presented in the Scott Pit CLOMR are the result of better topographic information and a Greater nurnher of cross sections, Thank you for your help on this application. Picase call either myself or Peggy Bailey at 9711 453-6394 should you have any more questions or need additional information. +Pea atxZii. W ar.a t<rso[:rtcr , 71.o t -Ob imams Rctii.M n, ScarlE ttErir_eccalan„ itwon'MawAN Scott Pit February 09 K-10 Federal Emergency Management Agency Washington, D.C. 20472 July 31, 2008 CERTIFIED MAIL RETURN RECEIPT REQUESTED The Honorable Keith Lambert Mayor, City of Rifle P.O. Box 1908 Rifle, CO 81650 Dear Mayor Lambert; IN REPLY REFER TO: Case No.: 08-08-0299R Community: City of Rifle, CO Community No.: 085078 104 This responds to a request that the Department of Homeland Security's Federal Emergency Management Agency (I'hMA) comment on the effects that a proposed project would have on the effective Flood Insurance Rate Map (FIRM), Flood Boundary and Floodway Map (FBFM), and Flood Insurance Study (FIS) report for your community, in accordance with Fart 65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated January 16, 2008, Mr. Fred A. Jarman, AICP, Director, Building and Pirating Department, Garfield County, requested that FEMA evaluate the effects that a proposed gravel mining project on the south overbank of the Colorado River from approximately 3,500 feet upstream to approximately 7,570 feet upstream of the State Highway 13 (SH 13) bridge, along with updated topographic information, would have on the flood hazard information shown on the effective FIRM, FBFM, and FIS report along the Colorado River from approximately 2,370 feet upstream to approximately 10,720 feet upstream of the SH 13 bridge. The area that affects the City of Rifle is on the left overbank of the Colorado River from approximately 2,370 feet upstream to approximately 6,210 feet upstream of the SH 13 bridge. The remainder of the revised reach is within the unincorporated areas of Garfield County. All data required to complete our review of this request for a Conditional Letter of Map Revision (CLOMR) were submitted with letters from Ms. Peggy Bailey, P.E., and Mr. Paul Schmidt, E.I.T., both with Tetra Tech, Inc. Because this revision request also affects the unincorporated areas of Garfield County, a separate CLOMR for that connununity was issued on the same date as this CLOMR. We reviewed the submitted data and the data used to prepare the effective FIRM and FBFM for your community and determined that the proposed project meets the minimum floodplain management criteria of the NFIP. The submitted existing conditions HEC -RAS hydraulic computer model, dated March 4, 2008, based on updated topographic information, was used as the base conditions model in our review of the proposed conditions model for this CLOMR request. We believe that, if the proposed project is constructed as shown on the drawing entitled "Scott Pit CLOMR Proposed Conditions Drawing Number C-2," prepared by Tetra Tech, Inc.. dated March 10, 2008, and the data listed below are received, the floodplain boundaries of the base (1 -percent -annual -chance) flood and the 0.2 -percent -annual -chance flood will be delineated as shown on the drawing entitled "Scott Pit CLOMR Annotated FIRM Drawing Number C-5," also prepared by Tetra Tech, Inc., and dated March 10, 2008. The existing conditions model was based on updated topographic information. Our comparison of existing conditions to the effective flood hazard information revealed that the Base Flood Elevations Scott Pit February 09 K-11 2 (BFEs) for the Colorado River both increased and decreased. The maximum increase in BFE, 0.3 foot, occurred approximately 3,730 feet upstream of the SH13 bridge. The maximum decrease in BFE, 0.1 foot, occurred approximately 4,570 feet upstream of the SH13 bridge. The proposed conditions model incorporated the proposed gravel mining excavation into the existing conditions model. As a result of the proposed project, the BFEs for the Colorado River will decrease compared to the existing conditions BFEs. The maximum decrease in BFE, 0.8 foot, will occur approximately 5,940 feet upstream of the SH13 bridge. As a result of the proposed project and updated topographic information, the BFEs for the Colorado River will both increase and decrease compared to the effective BFEs. The maximum increase in BFE, 0.3 foot, will occur approximately 3,730 feet upstream of the SH13 bridge. The maximum decrease in BFE, 0.7 foot, will occur approximately 5,940 feet upstream of the SH13 bridge. The width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, will increase in some areas and decrease in other areas compared to the effective SFHA width. The maximum increase in SF1-IA. width, approximately 120 feet, will occur approximately 4,620 feet upstream on the SH13 bridge. The maximum decrease in SFHA width, approximately 100 feet, will occur approximately 3,120 feet upstream of the SH13 bridge. As a result of the proposed project and updated topographic information, the width of the regulatory floodway along the Colorado River will increase compared to the effective floodway width. The regulatory floodway will also shift to the south to remove the city potable water intake facilities from the floodway. The maximum increase in floodway width within the City of Rifle, approximately 50 feet, will occur on the south overbank approximately 5,430 feet upstream of the SH13 bridge. Upon completion of the project, your community may submit the data listed below and request that we make a final determination on revising the effective FIRM, FBFM, and FIS report, • Detailed application and certification forms, which were used in processing this request, must be used for requesting final revisions to the maps. Therefore, when the map revision request for the area covered by this letter is submitted, Form 1, entitled "Overview & Concurrence Form," must be included. (A copy of this form is enclosed.) • The detailed application and certification forms listed below may be required if as -built conditions differ from the preliminary plans. If required, please submit new forxns (copies of which are enclosed) or annotated copies of the previously submitted forms showing the revised information. Form 2, entitled "Riverine Hydrology & Hydraulics Form" Foran 3, entitled "Riverine Structures Foran" Hydraulic analyses, for as -built conditions, of the base flood; the 10 -percent-, 2 -percent-, and 0.2 -percent -annual -chance floods; and the regulatory floodway, together with a topographic work map showing the revised floodplain and floodway boundaries, must be submitted with Form 2. • Effective October 1, 2007, FEMA revised the fee schedule for reviewing and processing requests for conditional and final modifications to published flood information and maps. In accordance with this schedule, the current fee for this map revision request is 54,800 and must be received before we can begin processing the request. Please note, however, that the fee schedule is subject Scott Pit February 09 K-12 3 to change, and requesters are required to submit the fee in effect at the time of the submittal. Payment of this fee shall be made in the farm of a check or money order, made payable in U.S. funds to the National Flood Insurance Program, or by credit card (Visa or MasterCard only). The payment, along with the revision application, must be forwarded to the following address: FEMA National Service Provider 3601 Eisenhower Avenue Alexandria, VA 22304-6425 • As -built plans, certified by a registered professional engineer, of all proposed project elements • Community acknowledgment of the map revision request • A copy of the public notice distributed by your community stating its intent to revise the regulatory floodway, or a statement by your community that it has notified all affected property owners and affected adjacent jurisdictions • Evidence of notification of all property owners who will be affected by any increases in width and/or shifting of the base floodplain and/or increases in BFE. This documentation may take the form of certified mailing receipts or certification that all property owners have been notified, with an accompanying mailing list and a copy of the letter sent, • A letter stating that your community will adopt and enforce the modified regulatory floodway, OR, if the State has jurisdiction over either the regulatory floodway or its adoption by your community, a copy of your community's letter to the appropriate State agency notifying it of the modification to the regulatory floodway and a copy of the letter from that agency stating its approval of the modification After receiving appropriate doctnrientation to show that the project has been completed, FEMA will initiate a revision to the FIRM, FBFM, and FIS report. Because the BFEs would change as a result of the project, a 90 -day appeal period would be initiated, during which community officials and interested persons may appeal the revised BFEs based on scientific or technical data. This CLOMR is based on minimum floodplain management criteria established under the NFIP. Your community is responsible for approving all floodplain development and for ensuring all necessary permits required by Federal or State law have been received. State, county, and community officials, based on knowledge of local conditions and in the interest of safety, may set higher standards for construction in the SFHA. If the State, county, or community has adopted more restrictive or comprehensive floodplain management criteria, these criteria take precedence over the minimumNFIP criteria If you have any questions regarding floodplain management regulations for your community or the NFIP in general, please contact the Consultation Coordination Officer (CCO) for your community. Information on the CCO for your community may be obtained by calling the Director, Mitigation Division of FEMA in Denver, Colorado, at (303) 235-4830. If you have any questions regarding this CLOMR, please call our Map Assistance Center, toll free, at 1 -877 -FEMA MAP (1-877-336-2627). Sincerely, Scott Pit February 09 K-13 4 Beth A. Norton, CFM, Program Specialist Engineering Management Branch Mitigation Directorate Enclosures cc: The Honorable John F. Martin Chairman, Garfield County Board of Commissioners Mr. John Hier City Manager City of Rifle Mr. Fred A. Jarman, AICP Director Building and Planning Department Garfield County Mr. Craig Lamberty United Companies Ms. Peggy Bailey, P.E. Tetra Tech, Inc. Scott Pit February 09 K-14 For: William R. Blanton Jr., CFM, Chief Engineering Management Branch Mitigation Directorate Federal Emergency Management Agency Washington, D.C. 20472 July 31, 2008 CERTIFIED MAIL IN REPLY REFER TO: RETURN RECEIPT REQUESTED Case No.: 08-08-0299R The Honorable John F. Martin Chairman, Garfield County B oard of Commissioners 108 Eighth Street Glenwood Springs, CO 81601 Dear Mr. Martin: Community: Garfield County, CO Community No.: 080205 104 This responds to a request that the Department of Homeland Security's Federal Emergency Management Agency (FEMA) continent on the effects that a proposed project would have on the effective Flood Insurance Rate Map (FIRM), Flood Boundary and Floodway Map (FBFM), and Flood Insurance Study (FIS) report for your community, in accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated January 16, 2008, Mr. Fred A. Jarman, AICP, Director, Building and Planning Department, Garfield County, requested that FEMA evaluate the effects that a proposed gravel mining project on the south overbank of the Colorado River from approximately 3,500 feet upstream to approximately 7,570 feet upstream of the State Highway 13 (SH 13) bridge, along with updated topographic information, would have on the flood hazard information shown on the effective FIRM, FBFM, and FIS report along the Colorado River from approximately 2,370 feet upstream to approximately 10,720 feet upstream of the SH 13 bridge. All data required to complete our review of this request for a Conditional Letter of Map Revision (CLOMR) were submitted with letters from Ms. Peggy Bailey, P.E., and Mr. Paul Schmidt, E.1.T., both with Tetra Tech, Inc. Because this revision request also affects the City of Rifle, a separate CLOMR for that community was issued on the same date as this CLOMR. We reviewed the submitted data and the data used to prepare the effective FIRM and FBFM for your community and determined that the proposed project meets the minimum floodplain management criteria of the NFIP. The submitted existing conditions HEC -RAS hydraulic computer model, dated March 4, 2008, based on updated topographic information, was used as the base conditions model in our review of the proposed conditions model for this CLOMR request. We believe that, if the proposed project is constructed as shown on the drawing entitled "Scott Pit CLOMR Proposed Conditions Drawing Number C-2," prepared by Tetra Tech, Inc., dated March 10, 2008, and the data listed below are received, the floodplain boundaries of the base (1 -percent -annual -chance) flood and the 0 .2 -percent -annual -chance flood will be delineated as shown on the drawing entitled "Scott Pit CLOMR Annotated FIRM Drawing Number C-5," also prepared by Tetra Tech, Inc., and dated March 10, 2008. The existing conditions model was based on updated topographic information. Our comparison of existing conditions to the effective flood hazard information revealed that the Base Flood Elevations Scott Pit February 09 K-15 2 (BFEs) for the Colorado River bosh increased and decreased. The maximum increase in BFE, 0.3 foot, occurred approximately 3,730 feet upstream of the SH13 bridge. The maximum decrease in BFE, 0.2 foot, occurred approximately 6,210 feet upstream of the SH13 bridge. The proposed conditions model incorporated the proposed gravel mining excavation into the existing conditions model. As a result of the proposed project, the BFEs for the Colorado River will decrease compared to the existing conditions BFEs. The maximum decrease in BFE, 0.9 foot, will occur approximately 6,210 feet upstream of the SH13 bridge. As a result of the proposed project and updated topographic information, the BFEs for the Colorado River will both increase and decrease compared to the effective BFEs. The maximum increase in BFE, 0.3 foot, will occur approximately 3,730 feet upstream of the SH13 bridge. The maximum decrease in BFE, 2.2 feet, will occur approximately 6,790 feet upstream of the SH13 bridge. The width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, will increase in some areas and decrease in other areas compared to the effective SFHA width. The maximum increase in SFHA width, approximately 220 feet, will occur approximately 4,370 feet upstream of the S1113 bridge. The maximum decrease in SFI-IA width, approximately 180 feet, will occur approximately 3,470 feet upstream of the SH13 bridge. As a result of the proposed project and updated topographic information, the width of the regulatory floodway along the Colorado River will increase in some areas and decrease in other areas compared to the effective floodway width. The maximum increase in floodway width, approximately 450 feet, will occur approximately 4,710 feet upstream of the SH13 bridge. The maximum decrease in floodway width, approximately 530 feet, will occur approximately 6,000 feet upstream of the SH13 bridge. The regulatory floodway will also shift to the south to remove the City of Rifle potable water intake facilities from the floodway. The maximum shift, approximately 400 feet, will occur approximately 5,430 feet upstream of the SH13 bridge. Upon completion of the project, your community may submit the data listed below and request that we make a final determination on revising the effective FIRM, FBFM, and FIS report. • Detailed application and certification forms, which were used in processing this request, must be used for requesting final revisions to the maps. Therefore, when the map revision request for the area covered by this letter is submitted, Form 1, entitled "Overview & Concurrence Form," must be included. (A copy of this form is enclosed.) • The detailed application and certification forms listed below may be required if as -built conditions differ from the preliminary plans. If required, please submit new forms (copies of which are enclosed) or annotated copies of the previously submitted forms showing the revised information. Form 2, entitled "Riverine Hydrology & Hydraulics Form" Fontn 3, entitled "Riverine Structures Form" Hydraulic analyses, for as -built conditions, of the base flood; the 10 -percent-, 2 -percent-, and 0.2 -percent -annual -chance floods; and the regulatory floodway, together with a topographic work map showing the revised floodplain and floodway boundaries, must be submitted with Form 2. Scott Pit February 09 K-16 3 • Effective October 1, 2007, FEMA revised the fee schedule for reviewing and processing requests for conditional and final modifications to published flood information and maps. In accordance with this schedule, the current fee for this map revision request is $4,800 and must be received before we can begin processing the request. Please note, however, that the fee schedule is subject to change, and requesters are required to submit the fee in effect at the time of the submittal. Payment of this fee shall be made in the form of a check or money order, made payable in U.S. funds to the National Flood Insurance Prouram, or by credit card (Visa or MasterCard only). The payment, along with the revision application, must be forwarded to the following address: FEMA National Service Provider 3601 Eisenhower Avenue Alexandria, VA 22304-6425 • As -built plans, certified by a registered professional engineer, of all proposed project elements • Community acknowledgment of the map revision request • A copy of the public notice distributed by your community stating its intent to revise the regulatory floodway, or a statement by your community that it has notified all affected property owners and affected adjacent jurisdictions • Evidence of notification of all property owners who will be affected by any increases in width and/or shifting of the base floodplain and/or increases in BFE. This documentation may take the form of certified mailing receipts or certification that all property owners have been notified, with an accompanying mailing list and a copy of the letter sent, • A letter stating that your community will adopt and enforce the modified regulatory floodway, OR, lithe Slate has jurisdiction over either the regulatory floodway or its adoption by your community, a copy of your community's letter to the appropriate State agency notifying it of the modification to the regulatory floodway and a copy of the letter from that agency stating its approval of the modification After receiving appropriate documentation to show that the project has been completed, FEMA will initiate a revision to the FIRM, FBFM, and FIS report. Because the BFEs would change as a result of the project, a 90 -day appeal period would be initiated, during which community officials and interested persons may appeal the revised BFEs based on scientific or technical data. This CLOMR is based on minimum floodplain management criteria established under the NFIP. Your community is responsible for approving all floodplain development and for ensuring all necessary permits required by Federal or State law have been received. State, county, and community officials, based on knowledge of local conditions and in the interest of safety, may set higher standards for construction in the SFHA. if the State, county, or community has adopted more restrictive or comprehensive floodplain management criteria, these criteria take precedence over the minimum NFIP criteria. If you have any questions regarding floodplain management regulations for your community or the NFIP in general, please contact the Consultation Coordination Officer (CCO) for your community. Information Scott Pit February 09 K-17 4 on the CCO for your community may be obtained by calling the Director, Mitigation Division of FEMA in Denver, Colorado, at (303) 235-4830. If you have any questions regarding this CLOMR, please call our Map Assistance Center, toll free, at 1 -877 -FEMA MAP (1-877-336-2627), Sincerely, -6,2)14\ altor404L, Beth A. Norton, CFM, Program Specialist For: William R. Blanton Jr., CFM, Chief Engineering Management Branch Engineering Management Branch Mitigation Directorate Mitigation Directorate Enclosures cc: The Honorable Keith Lambert Mayor, City of Rifle Mr. Fred A. Jarman, AICP Director Building and Planning Department Garfield County Mr. John Hier City Manager City of Rifle Mr. Craig Lamberty United Companies Ms. Peggy Bailey, P.E. Tetra Tech, Inc. Scott Pat February 09 K-18 5.0 PIT CAPTURE AND CHANNEL STABILITY The following analysis was provided by Tetra Tech. The original report is presented in Appendix B. Sediment transport and geomorphic conditions within the site as well as changing conditions above and below the site, will always have the potential to alter the channel alignment and current form of the project reach. However based on review of historical records and visual observations, there is no evidence of rapid or eminent sediment or debris transport or conditions that will significantly affect the base flood elevations (BFE) at Scott Pit. The stream appears to be in a stable state with no apparent evidence that stream configuration has been recently influenced by sediment deposition, degradation, or vegetative cover. For this reason, sediment transport is not considered in this analysis. A cursory geomorphic analysis was performed utilizing aerial photography of the area between 1968 and 2005. The aerial photography was provided by Lewicki and Associates and includes photos taken in 1968, 1978, 1982, 1989, and 2005. The 2005 aerial is shown with overlays of the 1968 and 1989 alignments in Figure K-1. Based on these photos the reach appears to have minimal lateral movement. The downstream end of the site does show some minor migration to the south, most likely as a result of the 1983 or 1984 floods, which produced flows near to the estimated 100 -year flood. Review of the 1989 and 2005 overlays indicates that since the 1983/1984 floods, this downstream section has experienced minimal lateral movement. The upstream end of the site appears to have remained laterally stable since 1968, especially the area immediately upstream of the oxbow. The floodplain corridor is relatively confined by Highway 6 to the north and Interstate 70 to the south. It should be noted that this analysis is based on review of aerials immediately in the vicinity of Scott Pit and does not consider other developments, gravel pit operations, new gravel pits or other channel changes upstream or downstream of the site which could possibly affect conditions within the project reach. Under developed conditions, two ponds will be created as a result of the gravel mining operations. These ponds are set with a minimum 100 foot buffer between the River channel and inside edge of the ponds. The buffer, in addition to the fact that the river does not have an outside bend in the study area reduces the probability for pit capture. The buffer also contains many Scott Pit February 09 K-19 existing cottonwood trees and other existing vegetation to provide additional protection and bank stability. Under proposed conditions, it is anticipated that both pits 1 and 2 will flood when flows in the river reach about 10,000 cfs which is slightly greater than the 2 -year flood. Pit 1 will overtop somewhat uniformly along its banks at approximately elevation 5310. Pit 2 will flood when flows exceed elevation 5310.5 and back up from the downstream end of the oxbow at station 45+00. Bank protection is proposed using an inflow/outflow structure (rundown) for Pit 1 to funnel flows back into the pond and into the river at its downstream bank low point. this presents flows into the pond or back to the Rived from compromising the buffer area through erosion. Pit 2 overtops at a low point along the oxbow. Based on the topographic map, it appears the oxbow is not deep, and velocities are low, thus reducing the potential for erosion as the pit empties and drains. Thus a rundown is not proposed at Pit 2. The rundown at Pit 1 shall be 49 feet wide at the top with 4 to 1 side slopes, lined with riprap. Riprap shall be in accordance with CDOT standards for a D50 of 18 inches and 3 feet in thickness along the top of the buffer, and 6 feet thick of riprap down the pit slope. Bedding below the riprap is also recommended and shall be 8 inches thick of 3 inch minus bedding per CDOT standard for Class A filter material. Details of the inflow/outflow structure are included on the following pages as well as shown on Map F-1. It is proposed that this inflow/outflow structure be placed at the reclamation stage of Mining Area 1. United will fix any erosion that occurs while they are mining the area. Scott Pit February 09 K-20 6.0 River Buffer Stability During normal conditions, the River and the lake levels will be approximately the same elevation due to the porous nature of the gravel. During a major rise in the River, there could be an imbalance in the elevations until equilibrium is reached. It is expected that this will occur rapidly for the following reasons: 1) the porosity of the gravel is very high so that levels will increase in the lake due to increases in the river, 2) the high probability that a 100 year event in the river will likely have rainfall in the izninediate watersheds, thus raising the lakes from nearby runoff, 3) the inflow/outflow structures allow water to flow in and out of the lakes in a controlled way, thus protecting the buffer. Nvertheless, Huddleston Berry was contracted to address the potential instability of the buffer that could arise from any imbalance of the elevations in the lake and river. Their report, enclosed in Appendix E, shows that stability will be maintained. Scott Pit February 09 K-21 2005 Aerial Photo w/1968 & 1989 overlays Approx. Scale: 1":4001 Figure K-1 Scott Pit February 09 K-22 BONDING EXHIBIT L Reclamation bonding for a mining permit is calculated by the DRMS. The bond presented in a DRMS permit application is an estimate for the reclamation costs. The DRMS takes that estimate primarily as a guide for the tasks to be included in their reclamation analysis. They then use complicated models based on cost surveys of actual equipment and supplies to calculate the bond amount. Based on these calculations the DRMS permit has a total bond of $212,000. This includes some tasks and work at the Chambers Pit which is tied through the DRMS to this site. While State law indicates that double bonding is not required or possibly legal for mine sites, United will agree to post a $24,000 bond for weed control to the County. Upon approval of this application the operator commits to posting the bond in the amount shown above. Also, as described earlier, County officials will be invited to any bond release inspection to be conducted by the DRMS. If United has not completed the reclamation according to the proposed plan, the bond will not be released until the work is fully satisfactory. Scott Pit February 09 L-1 OTHER PERMITS AND LICENSES REQUIRED EXHIBIT M The following additional permits are necessary for this site: 1. NPDES Combined Process and Stormwater Permit This permit has been submitted for the site. It will require a revision due to the extensive changes required as part of the County and City of Rifle Permitting Process. A new application has been submitted to CDPHE. It is enclosed in Appendix A. 2. Air Emissions Permit A revised Air Pollution Emission Notice (APEN) is included in Appendix I. The approved Operation and Maintenance Plan (0 & M Pian) for the asphalt plant that will be brought to the site is also included in Appendix I. 3. USACOE 404 Permit The current intent is to avoid most wetlands. An application for wetlands excavation under the Tulloch rule has been approved. A 404 permit will not be needed for this operation. 4. CDOT Access Permit A permit has been approved for the site. A maximum of 335 trips are allowed for the access on the frontage road. A condition of this permit is the paving of the road from the Lafarge Mamm Creek entrance to the future entrance of the pit. Since this permit is due to expire January 22 of 2009, if the special use permit is not granted with sufficient time to allow the paving to be done, United will ask CDOT for an extension to complete the paving. If this cannot be done, United will re -apply for the permit with a new traffic study. 5. City of Rifle Watershed Permit This application is currently pending. A majority of the changes of this version of the permit from the previous one were due to changes requested by the City and United's decision to lessen the mining area. The application made to the City of Rifle is enclosed in Appendix E. Maps have been reduced in this copy, as they are similar to the County maps. Scott Pit February 09 M-1 6. Mining and Reclamation Permit from the Colorado Division of Reclamation, Mining and Safety. This permit was approved for a larger mining and reclamation plan. It will be revised to reflect the current proposal of 2008. This application will only be made upon approval of the County Special Use permit. Approval from DRMS will be supplied to the County once it is obtained. The existing approved maps (reduced) and permit approval letter are enclosed in Appendix F. 7. Gravel Well Permit with State Division of Water Resources ....................... This permit is in valid standing as of October 2008. The well completion form was submitted and accepted. See permit and additional correspondence in Appendix H. Scott Pit February 09 M-2 COPY OF DEED AND RIGHT OF AGENT EXHIBIT N The surface and gravel owner of this site is Rivers Edge, LLC. Please see a copy of the Right of Agent, and Deed for the site in this section. Scott Pit February 09 N-1 1111111111111111111111(11111111111111111111111111111111 654430 10/14/2005 02 59P 51735 P152 11 to .SDORF 1 of 2 R 21.01 D B.00 GARFIELD COUNTY CQ QUIT CLAIM DEED Pitkin Exchange Holdings of Aspen LLC, "Grantor", whose address is 601 E. Hopkins; Aspen, Colorado, 81611, for the consideration of Ten Dollars and other good and valuable consideration, in hand paid, hereby sells and quitclaims an undivided 48% interest to Rivers Edge, a/k/a Rivers Edge LLC, and an undivided 52% interest to Rocks R Us LLC, collectively "Grantee", whose joint address is P.O. Box 15 56, Rifle, Colorado, 81650, in and to the following real property in the County of Garfield and State of Colorado, to wit: All that part of Parcels A and 13, hereinafter described, Northerly of the Northerly right of way line of Interstate 70 as described in he rule and order recorded May 16, 1985 in Book 668 at Page 708. PARCEL A All of Lots 1, 2, 3 and 4 and the East 232 feet of Lot 5, all in the McLearn Orchard Lands according to the map and. dedication, Document No. 38435, in the. Clerk and Recorders Office, Garfield County, Colorado, known as the First Filing thereof (said Lots comprise pan of the SEI/4, the SW1/4 and Lot 5 in Section 15, Township 6 South, Range 93 West, 6th P.M. PARCEL B The West 143 feet of Lot 5 and all of Lots 6 through 11, inclusive, in Section 15, Township 6 South, Range 93 West, 6th P.M., as platted as the Mel -earn Orchard Lands, First Filing, Document No. 38435. PARCEL NO. 1 A tract or land situate in the SEI:4NW1/4 and the SW 1/4NE1/4 of Section 15, Township 6 South, Range 93 West, 6th P.M.. more fully described as follows: Beginning at a point whence the Meander Comer of the. West Line of said Section 15 bears: South 59'48' West 1555.1 feet; thence North 200.00 feet; thence North 77'15' East 250.00 feet; thence North 5415' East 875.00 feet; thence South 88'30' East 450.00 feet; thence North 75'00' East 340.00 feet; thence South 70°41' East 404.40 feet; thence South 980.00 feet; thence South 85'55' West 170.00 feet; thence South 72'45' West 734.55 feet; thence North 41'20' West 672.50 feet; them North 14 0.0 • 4.: Law.ru.. la,•a.•. i1rrwt kkCQRD1N' , PLTUIU4 10 ;air. R. $0,e6, PC PO Hoc 915 Olowgia41 S,riy,,, CO MGM: Scott Pit February 09 N-2 1111111 1111111111111111111111111111111 111110E111 684430 10/14/2005 02 59? 81736 P153 11 ALSDORF 2 of 2 R 11.90 0 9.08 GRRFIELD COUNTY CQ 80'49' West 664.62 feet; thence South 52'20' West 180.00 feet, to the POINT OF BEGINNING. PARCEL NO. 2 Beginning at the Meander Corner on the East line of said Section 15, thence South 87'70' West 1320.00 feet; thence South 85'55' West 534.88 feet; thence North 980.00 feet; thence North 87'13' Eau 535.00 feet; thence North 72'02' East 1385.10 feet; thence south 1330.00 feet, to the POINT OF BEGINNING. with all its appurtenances. SIGNED this 114 day of October 2005. Pitkin Exchange Holdings of Aspen LLC, By: Pi Exch. ge, Inc., tanager By: Joy S. igen, Preside STATE OF COLORADO ) ) ss. COUNTY OF PITKIN ) The foregoing instrument was acknowledged before me this 1tid> day of October 2005, by Joy S. Higens as President of Pitkin Exchange, Inc., Manager of Pitkin Exchange Holdings of Aspen LLC. WITNESS my hand and official seal. My commission expires: brand! L. Jepson /Notary Public My Commission Expires 07/25/2008 601 E. Hopkins Aspen, CO 81611 tA11RV.w 4p.Chis Mr.1ili W. 1W RPk... Notary Public Arra. RLCORAIN0, PRTURN 'atm it ScAto1.I'.C. 3`.0. 140 S1. Olui eaf Sprai1, CO 1110.2 Scott Pit February 09 N-3 August 1, 2006 I, Bill Bailey, Member Manager of Rivers Edge, LLC, authorize Greg Lewicki & Associates to act as my agents for any business transactions concerning the application of the Colorado Division of Minerals & Geology Mining Permit and the Garfield County Special Use Permit for the property near Rifle, CO. The property is South of the Colorado River and North of 1-70. The address to this property is: 001 County Road 315, Silt, CO, 81652. .? Rivbrs Edge, LLC Bill Batley, Member Ma ger State of Colorado j j s.s. County of Garfield ) The foregoing instrument was acknowledged before me this,,.,, day of August. 2006, by Bili Bailey, Member Manager. Witness my hand and official seal. My Commission Expires: i t Conniirsion Ems: 08121 4009 Scott Pit February 09 N-4 August 1, 2006 1, Uv Fawcett, Member Manager of Rocks R Us, LIC, authorize Greg Lewicki & Associates to act as my agents for any business transactions concerning the application of the Colorado Division of Minerals & Geology Mining Permit and the Garfield County Special Use Permit for the property near Rifle, CO. The property is South of the Colorado River and North of 1-70. The address to this property is: 001 County Road 315, Silt, Co, 81652. Roc R Us. LIC Uv Fawcett, Member Manager State of Colorado j 1 s.s. County of Garfield ) The foregoing instrument was acknowledged before me this / day of August, 2006, by Liv Fawcett, Member Manager. Witness my hand and official seal. My Commission Expires: My Comission Ergs: 06121 t2009 Scott Pit February 09 N-5 QUIT CLAIM DEED Rocks R Us, LLC whose address is P.O. l3ox 226, Rifle, CO 81650, for the consideration of Ten Dollars and other good and valuable consideration, in hand paid, hereby sells and quitclaims its undivided 52% interest to Rivers Edge, a'k/a Rivers Edge, LLC, whose address is P.O. Box 226, Rifle, CO 81650, in and to the following real property in the County of Garfield and State of Colorado, to -wit: All that part of Parcels A and B, hereinafter described, Northerly of the Northerly right of way line of Interstate 70 as described in the rule and order recorded May 16, 1985 in Book 668 at Page 708. PARCEL A Ail of Lots 1, 2, 3 and 4 and the East 232 feet of Lot 5, all in the McLearn Orchard Lands according to the map and dedication, Document No. 38435, in the Clerk and Recorder's Office, Garfield County, Colorado, known as the First Filing thereof (said Lots comprise part of the SPA,. the SW'/r and Lot 5 in Section 15, Township 6 South, Range 93 West, 6"' P.M. PARCEL B The West 143 feet of Lot 5 and all of Lots 6 through 11, inclusive, in Section 15, Township 6 South, Range 93 West, 66 P.M., as platted as the McLearn Orchard Lands, First Filing, Document No. 38435. PARCEL NO. 1 A tract of land situate in the SE`/+N W'V, and the SW '41\1E1/4 of Section 15, Township 6 South, Range 93 West, 6"' P.M., more fully described as follows: Beginning at a point whence the Meander Comer of the West Line of said Section 15 bears: South 59°48' West 1555.1 feet; thence North 200.00 feet; thence North 77°15' East 250.00 feet; thence North 54°15' East 875.00 feet; thence South 88°30' East 450.00; thence North 75°00' East 340.00 feet; thence South 70°41' East 404.40 feet; thence South 980.00 feet; thence South 85055' West 170.00 feet; thence South 72°45' West 734.55 feet; thence North 41°20' West 672.50 feet; thence North 80°49' West 664.62 feet; thence South 52020' West 180.00 feet, to the POINT OF BEGINNING. PARCEL NO. 2 Beginning at the Meander Corner on the East line of said Section 15, thence South 87°10' West 1320.00 feet; thence South 85°55' West 534.88 feet; thence North Scott Pit February 09 N-6 980.00 feet; thence North 8713' East 535.00 feet; thence North 72°02' East 1385.10 feet; thence south 1330.00 feet, to the POINT OF BEGINNING. with all its appurtenances. SIGNED this o `qday of November, 2008. ROCKS R US, LLC Bill B. Bailey, Manager STATE OF COLORADO ) ) ss. COUNTY OF MESA ) The foregoing instrument was acknowledged before me this 4p 1ay of November, 2008, by Bill B. Bailey as Manager of Rocks R Us, LLC. WITNESS may hand and official seal. QUIT CLAIM DEED Page 2 Notary blic My Commission Expires: /v1 Scott Pit February 09 N-7 MINERAL OWNERS EXHIBIT 0 The mined substance is sand and gravel. All sand and gravel rights are held by Rivers Edge, LLC. In the southeast corner of the project, the oil and gas rights are divided with the following additional owners having right to oil and gas below the site. No interference with this right will occur. The mining will take place within 30 feet of the surface. Gas well depths within this area are more than 10,000 feet. Two pads have been permitted for this property to extract oil and gas. These well pads can be seen on Maps C-2 and F-1. Public notices have been sent via certified mail. Mineral Owners other than Rivers Edge, LLC Map -2003 -Net 100 Park Ave Suite 1008 Oklahoma City, OK 73102 MJB Energy Company c/o Carla Berklau 1102 Firethorn Court Rifle, CO 81650 B&L Resources, LLC PO Box 1556 Rifle, CO 81650 Barrett D Baker 717 17th' St., Suite 1545 Denver, CO 80202 Layne Family Limited Partnership 12011 County Road 320 Rifle, CO 81650 Scott Pit February 09 0-1 Kristine Peterson 252 S. Wadsworth Blvd Suite 303 Lakewood, CO 80227 NEARBY LANDOWNERS EXHIBIT P The following are surrounding lands owners of the proposed site. Records were researched on July 31, 2006. Public notices have been sent via certified mail. City of Rifle PO Box 1908 Rifle, CO 81650 W.F. Clough PO Box 686 Rifle, CO 81650 UMETCO Minerals Corp c/o John E Nichols CMI 2301 Brazosport Blvd Freeport, TX 77541-3269 State of Colorado Dept of Highways 4201 E Arkansas Ave Denver, CO 80222-3406 Colorado Rivers Edge, LLC PO Box 1556 Rifle, CO 81650 Gypsum Ranch Co, LLC PO Box 1220 Carbondale, CO 81623 Scott Pit February 09 P-1 GEOTECHNICAL STABILITY EXHIBIT EXHIBIT Q Two slope stability scenarios must be examined for this site. During the mine's life, the maximum allowable slopes are 2H:1V for the perimeter during mining and 3H:1 V during reclamation. While the pit is being mined, vertical slopes will occur within the center of the pits. This vertical slope is left to improve operational conditions during mining. The vertical slope will only be allowed to progress to the pit's depth away from the final pit crest. Once the edge of mining reaches this boundary, which will be staked and flagged, the miners will either push or pull down the slopes to the 211:1V mining slope maximum. Once the slopes have been laid back, they will be backfilled with overburden and topsoil to a maximum slope of3H:1V. The diagram below illustrates the angles and ratios described in this Exhibit. Crest of Vertical Mining 18 t 3H:1V Maximum Reclamation Slope 2H:I V Mining Slope 25' 25' 40° Crest of Final Slope 14a, r r, _,:_r From Verfrcal wsn Far ir•. Angle of Repose for Gravel Property/Parcel f Boundary f Gravel Depth The local gravel's slope stability properties are well known for this area. This knowledge is not based on tests in laboratory but rather practical experience. A quick trip to any neighbouring pit is full of examples of vertical slopes, which exhibit a safety factor greater than 1. This is indicated by the fact that no slope failures have occurred. Additional proof comes from the fact that the gravel slopes are generally ruled by the internal friction angle of the material. For gravel, this tends to be between 1.211:1V (40°) and IH:2V Scott Pit February 09 Q-1 (45°). This even holds true in a completely saturated state. In the case of a dewatered pit, the stable angle will approach or go past vertical due to the addition of the cohesive properties. Therefore in the worst case scenario of completely flooded pit with a mining slope of 2H:1 V, the slope will have an approximate safety factor of 2. If a vertical wall were left and a pit flooded causing a loss of cohesion, the crest of the slope after the failure would be further in from the property line than the intended final crest. This failure slope will be at the angle of repose or steeper. Again assuming the worst case, the failed slope will be the angle of repose. To determine the location of the failure surface, the midslope of the failure surface is aligned to the vertical wall. This location is based on the concept that as the upper portion of the vertical wall fails; it will fill in the lower half of the wall until the failure comes to rest at the angle of repose. The safety factor is further increased by a minimum buffer which will exist around the property. This is due to roads being left along the south and east with minimum widths of 25 feet, the 100 foot buffer along the river, and the well pad located along the west. For a failed slope to reach the property line the final slope would have to be 4H: IV (14°). This relates to safety factor of 4. I, Greg Lewicki, P.E., with over 20 years of experience in mine slope safety analysis in Colorado, state that this is true and that this factor of safety is adequate to prevent slope failure for injuring off site property. Scott Pit February 09 Q-2 5.17 SUPPLEMENTAL GRAVEL EXTRACTION REGULATIONS EXHIBIT R Scott Pit February 09 R-1 5.17.01 Water Quantity & Quality Impacts / Floodplain Impacts 1. The river floodplain and floodway are shown on Map C-1, which is located in Appendix C. A new CLOMR has been approved based on the proposed mining and reclamation operation. 2. The Stormwater Management Plan (SWMP) is provided in Appendix A. The BMP's that will be implemented are the same as those in the Sediment and Erosion Control Plan, which are: Stormwater Management • Off site stormwater will be allowed to pass over undisturbed areas to the River. • Stormwater encountered within the disturbed areas will be drained to the active pit. • The pump will be installed below the active pit floor to help prevent sediment contact with groundwater. • Trenches around the perimeter of the pit to help prevent sediment contact with groundwater. • Berms around the pump to filter the sediment out of the water that is being discharged. • There are strict timeframes for reclamation of each pit after mining is completed. Other Pollution Prevention Measures • On site roads are covered with aggregate road base. • The off site frontage road will be paved by United to the Mamm Creek exit of 1- 70. • Unused topsoil stockpiles in place over 60 days are seeded and mulched. • An aggregate rock base course pad is maintained at points of ingress and egress. This will reduce mud and dirt from being transported outside of the perimeter banned area. • Vehicle maintenance will be conducted in the facilities area that drains to a sump that is not discharged. Scott Pit February 09 R-2 • Petroleum products are stored in double walled tanks in the facility area, except the tanks associated with the crusher & screen plant and the wash plant, which are also double walled but are located within the pit. 3. An SPCC plan has been developed for the site and is included in Appendix A. 4. A letter is required from the Rifle Fire Protection District stating that the proposed project has been adequately designed to handle the storage of flammable or explosive solids or gases and that the methods comply with the national, state and local fire codes. Fred Jarman has stated that this will be obtained through the referral process with the County. 5. No materials or wastes shall be deposited upon a property in such form or manner that they may be transferred off property by any reasonably foreseeable natural causes or forces. 6. Development in 100 Year Floodway of the Colorado River a) As defined in Rule 6.03.01 and 6.03.02, no structure will be constructed, improved or altered within the Area of Special Hazards in the report titled Flood Insurance Study, Garfield County, Colorado, Unincorporated Areas, 2006 or the older USACOE study for the site. The only areas that will receive fill are areas that will be excavated and then partially filed. There are no areas of filling or any other encroachments above original ground on any portion of the permit area. b) As stated above, there are no encroachments or filling in any area within the floodway. See Map C-2, which shows the existing floodway lines, as well as the location of the proposed temporary plants. Only excavation and reclamation will take place on site. The final plans (after reclamation) are addressed in the new CLOMR, which was developed by Tetra Tech for the Colorado River in the surrounding area. This floodplain and floodway evaluation was found to be acceptable to FEMA and was approved in 2008. The floodway Scott Pit February 09 R-3 and floodplain lines after mine reclamation are shown on Map F-1. All items are also addressed below: 6.09.01 There are no encroachments, fill or structures within the areas of special flood hazard. In addition, the technical analysis presented in the CLOMR, using very detailed survey data of the river and the surrounding area, shows that there is no rise in the river due to the proposed plan. The plan focuses on the reclaimed site, which will contain two lakes. The mining phase of the activity cannot raise levels since there will be a larger excavation at that time. After reclamation, each mining area will become a lake, which is slightly lower than the original land surface. 6.09.02 There are no residential structures within the areas of special flood hazard. c) The asphalt and concrete plants will be set up outside of the floodway. FEMA has issued a new CLOMR to the County to cover the proposed activity. d) There is no storage of fuel or hazardous materials including concrete/asphalt plants in the floodway. During portions of the mining operation, a portable wash plant and crusher/screen plant will be located at the bottom of the pit, but this is outside the floodway as shown on Map C-2. The crusher/screen plant and wash plant have integral tanks that are part of the plants, but these are moved with the plant as they are hauled in and out of the pit. The list of fuel temporarily located on site will be as follows: a. Crusher and Screen Plant — there are a total of 6 separate tanks for diesel fuel, 2 each @ 250 gallons, 2 each @ 500 gallons and 1 @ 600 gallons. This portable plant has separate fuel tanks for each component of the plant: primary crusher with two saddle tanks, 2 cone crushers and 2 screens. These tanks are filled daily during the operation. b. Asphalt Plant — 1 tank of 10,000 gallons diesel or burner fuel c. Ready Mix Plant and Trucks —1 tank of 10,000 gallons diesel. d. Wash Plant — 1 tank @ 1000 gallons. Scott Pit February 09 R-4 This is the maximum complement of fuel tanks on site. The loader would receive fuel from of one of these tanks. If United does not move the asphalt or ready mix plants onto the site, there will be a 1000 gallon tank for the loader only, which will be located near the office trailer outside the 100 year floodplain. AU of these tanks are attached to the portable plants themselves. They are all double walled tanks or secondary containment is provided by a steel trough below the tank which can store a volume of at least 110% of the full tank volume. The exception to this is the 1000 gallon tank for the wash plant, which is mounted on a skid for portability and has a secondary containment of a lined berm at the base of the skid. The skid can be moved in minutes if necessary. The asphalt plant and concrete plant tanks are stored outside the 100 year floodplain, as shown on Map C-4. The portable crusher & screen plant and the wash plant would be located at the pit bottom for the vast majority of the mining operation. These plants would be moved out of the pit if floodwaters rise in the river to a certain level, as part of the staff gage monitoring system. United cannot afford for these plants to be inundated with water; it is in operator's best interest to ensure that these plants are removed before any floodwaters enter the pit. To prevent contamination of surface water with petroleum products in the event of flooding the active mining area, the rivers surface elevation will be monitored through staff gages that are placed at pre -determined locations (the low points where water would enter the two mining pits). Monitoring will commence when the elevation of the river gets to within 2.5 feet of the elevation that would flood the mining area. When the river elevation reaches 1.5 feet below the elevation that would flood the mining area, all the equipment will be removed from the pit and taken to higher ground. The continuous monitoring level and evacuation level for each pit are detailed in the table below. Monitoring will be achieved using staff gages near each pit. These gages are shown on Map C-2. Mining Area Elevation of Mining Area Flooding Evacuation Level Monitoring Level 1 5308.0 5306.5 5305.5 2 5310.0 5308.5 5307.5 Scott Pit Februai y 09 R-5 The locations of the staff gages are shown on Map C-2 of the Mine Plan as well as the SPCC Flood Monitoring Map. Site personnel will be trained in the procedures for monitoring the gages. If threat of inflow exists into the pit, United will station a trained person through the night on site to monitor the gages. Other personnel will be on standby to remove the mobile equipment from the pit. It is expected that the portable plants will be located on site for 2 months at a time, 2 to 3 times per year. 7. Standards for Areas of Shallow Flooding The FEMA floodplain map for this area only includes the western portion of the site and approximately the western 2/3 of the oxbow area. There are no zones of AO and AH (shallow flooding) shown on the map. There is no reason to believe that any exists east of the end of the map, since the same terrain exists there, with the floodplain lines basically ending at the high ground near the Interstate. a) There is no new construction or substantial improvements of residential structures at this site. b) Non Residential Structures: The scale is the only structure to be installed on site that is not portable. All other pieces of equipment are mobile. The scale is installed outside the floodplain and floodway in the facilities area. See Map C-1 for the existing floodplain and floodway lines. The scale is shown on Map C-2. This scale will only be present for the life of the mine, which is expected to be approximately 5-3/4 years. Scott Pit February 09 R-6 c) No structures will be installed in the flood fringe area, which is the area subject to shallow flooding. See Certification below, provided by Professional Engineer Greg Lewicki, which serves as the PE certification for compliance with Section 6.09. d) No structures will be designed on slopes. I, Greg Lewicki, P.E., with 30 years experience in surface water hydrology and design of water related structures, certify that the standards of this Section 5.17.01-7, as proposed in Section 6.08.02(1)A, have been met. There are no zones of AO and AH in the permit area and no structures are located in this area. Scott Pit February 09 R-7 .2/2/07 8. The proposed operation is located a sufficient distance from other mining operations so as not to create cumulative impacts to the integrity of the water course. In the event of pit capture, the ground between one or more of the site's pit lakes and the river would be rapidly eroded by a flood type event. This should be distinguished from the waters of a flood entering the lakes during a flood event. If pit capture does occur, a new river alignment would pass through the pit lake rather than its previous alignment after the flood event recedes. All pit lakes in the Scott Expansion lie within the 100 -year floodplain of the Colorado River. In fact, the lakes lie within or near the 10 -year floodplain. This means that in a given year there exists a 10% chance of the pit and the river interacting. By allowing a 100 -foot minimum buffer between the river and the pit excavations the risk of pit capture will be minimized. Also, most vegetation will be left undisturbed in this buffer to minimize the risk of erosion during flood events. This vegetation consists of cottonwoods, willows and other shrubs and grasses. It should also be noted that the River at this location is tending to erode more on the north bank where the City's facilities are located than the south bank, where the Scott pit lakes would be located. This is due to the outside turn that exists near where the City's new intake structure is located. The risk of an extension of pit capture from the La Farge Mamm Creek Pit was also evaluated. This is an extremely low risk since their operations do not exist within the floodway and there is also a wide barrier with gas line easement that separates the Scott property from the La Farge property. See Map C-2. The minimum buffer here is 120 feet at the top of the ground. At the final slopes of 3H:1 V, the distance required for pit capture is approximately 200 feet. This easement area is well vegetated with trees, grass and shrubs. Also, La Farge has taken important steps to see that their pits are not captured. This includes inflow/outflow structures to regulate flow in and out of their pit lakes. Scott Pit February 09 R-8 In response to previous City of Rifle comments, the entire northeast corner of the reserve has been removed from the mining operation. See Map C-2. This area will be left unmined and later used for wildlife habitat. 9. In stream mining is not permitted and will not be used at the Scott Pit. 10. Water discharged into the wetlands and also the Colorado River will not exceed state standards for water quality. The main mitigation measures are 1) ensuring that the pit pump is placed below the working level of the pit, and 2) making sure there are gravel filter berms where any pit water must travel through these berms to get to the pit pump. Additional information pertaining to the dewatering and water discharge from the site is included in Exhibit D as well as in the Stormwater Management Plan and NPDES permit, which are included in Appendix A. The NPDES permit regulates the discharge water quality and the limits of 30 mg/1 average monthly level of suspended solids are far better than the River itself, which can produce 2000 mg/1 during the spring, early summer and a storm event at any time of the year. 11. An augmentation plan has been approved by the water court for the Scott Pit. Additional information concerning water consumption at the Scott Pit is located in Appendix H. Scott Pit February 09 R-9 5.17.02 Air Quality 1. The Scott Pit will comply with applicable County, State, and Federal regulations regulating air pollution and shall not be conducted in a manner constituting a public nuisance or hazard. 2. This pit will produce minimal fugitive dust due to the fact that is a wet pit. The material that is mined will have high moisture content and will naturally suppress dust. Also, this gravel has a low fines content; for this reason, its processing results in very little fine waste. The portable crushing and screen plant will move with the mining operation. It will have its own air emissions permit. Controls for this equipment include water sprays and enclosed crushing. The asphalt and concrete plants located on site will have individual portable air permits and will be operated within the specifications required by the State. All of these permits require opacity testing for dust and smoke. A revised Air Pollution Emission Notice (APEN) and the approved Operation and Maintenance Plan are included in Appendix I. The operating and maintenance plan shows the level of detail that will take place for monitoring dust and maintenance of mitigation controls on site. Vapor is produced when the temperature of the air is much less than the temperature of the water vapor emanating from the plants. This occurs on occasional cold winter days and the vapor dissipates before it leaves the property as the temperature equalizes. The distance of 150 feet to I-70 is sufficient to allow the vapor to dissipate. Any repair or maintenance activity requiring the use of equipment that will generate odors beyond the permit boundaries will be conducted within a building at anytime or outdoors during the hours of 7:00 AM to 8:00 PM Monday — Saturday. 3. The Scott Pit is located a sufficient distance from other mining operations as not to create cumulative impacts to air quality. The La Farge Mamm Creek Pit has stopped mining in their wet pits to the east of this operation. Gravel products will be transported from a new operation through a tube over the Colorado River to the existing Mamm Creek facilities, where the materials will be sold off site. This activity at the Mamm Creek site is Scott Pit February 09 R-10 a minimum of 2000 feet from the closest point to the Scott Pit site activity. Cumulative impacts are also accounted for in the CDPHE air emissions permit process. If an area already has high emissions, additional permits may not be allowed. This has not happened in the case of the Scott Pit. In addition, if activities are approved at the Scott Pit, the older Chambers Pit, operated by United north of the River, will be reclaimed. 4. All of the plants and processing equipment owned by United Companies have current portable air permits that meet current state air quality standards. It is not yet known which pieces of equipment will be brought to the site since United Companies owns several pieces of each type of equipment that is needed for the Scott Pit. Prior to the equipment being brought to the site, the air permits will be supplied to Garfield County. The site also has an Air Emissions Permit for Fugitive Dust for the mining activities. This permit is enclosed in Appendix I. Scott Pit February 09 R-11 5.17.03 Noise / Vibration 1. The Scott Pit has been studied for noise impacts. The noise study is included in Appendix G and shows that the industrial noise level limits will not be exceeded by the operation at a distance of 25 feet beyond the permit boundary. 2. The state noise levels will not be exceeded by the operation. 3. No operation at the Scott Pit will produce ground vibrations inherently and recurrently generated, without instruments, at any point of any boundary line of the property. United knows this from past experience with their plants. Scott Pit February 09 R-12 5.17.04 Visual Impacts 1. This gravel operation has been designed to operate in two phases, which are not operated concurrently. Additionally, there are strict timeframes which have been self-imposed regarding the ongoing backfilling, grading, topsoil replacement, reseeding, and full reclamation of each phase once mining is completed. See complete discussion in Exhibit D — Section 14. 2. Screen fences, beaming, and landscape materials will not accomplish anything along I-70 due to the fact that the Interstate is elevated above the permit area. The other three sides have significant buffers with large cottonwood trees. The site to the east is the Mamm Creek gravel pit. To the north is the natural buffer of 100 feet to the River, then industrial sites such as the Chambers Pit and the Casey concrete operation. The City of Rifle water intake is also located north and east of the pit. To the west is a small CDOT property which is currently undeveloped. 3. There is a barbed wire fence enclosing the operation from I-70, the CDOT property to the west and the La Farge property to the east. There is no fence to the River. This fence is not a visual barrier but there is no practical way that a visual barrier could be utilized on 1-70 due to the height of the road. It is also important to point out that the entire operation is scheduled to last only 5-3/4 years, and the reclamation of the site will provide a beautiful setting of two natural looking lakes, cottonwood trees, wetland fringe areas and dryland revegetation that is free from tamarisk and Russian olive. 4. United has done everything that is reasonably available to minimize visual impacts, including impacts to entryways to growth centers. Scott Pit February 09 R-13 5. Due to the fact that the operation is naturally screened on three sides and the operation cannot be reasonably screened from the westbound lanes of 1-70 due to elevation, there is nothing that can be done for a Berming, Screening and Buffering Plan, other than to state that when Mining Area #1 is mined, the pit disturbance is limited to 7.1 acres and the facilities will utilize approximately 4-5 acres of Mining Area #2. When Mining Area #2 is mined, Mining Area #1 will be reclaimed as a lake, and the disturbance of Mining Area #2 will be limited to a total of 13.9 acres. 6. All lighting shall be the minimum necessary, directed inward and downward towards the property. 7. Reclamation of the Scott Pit will comply with the reclamation timelines required by the County. Additional reclamation information is included in Exhibit D - Section 14. Scott Pit February 09 R-14 5.17.05 Impacts to the County Road System 1. A traffic study was completed by Curtis Rowe, P.E., PTOE of Kimley Horn. This study is included in Appendix D. An addendum to this study has been added to adjust the destination of trucks from the pit. All traffic leaving the pit will utilize the frontage road along 1-70 which starts at the Scott property and goes to the Mamm Creek exit of 1-70. The original estimate was based on 50% of the traffic from the pit entering westbound I-70 and 50% of the traffic entering eastbound on 1-70. United has evaluated the current conditions where some end users south of the Mamm Creek exit would purchase some gravel products. In order to reach these locations, some end users would use County roads. In particular, gas developers on Grass Mesa may purchase some gravel products for road base. These companies have not traditionally been buyers of United's products in the past, and there is no indication that they will be in the future. Also, the La Farge property has a 2.2 mile haul distance advantage since their property is almost directly at the Mamm Creek exit and their trucks do not need to use the frontage road. For these reasons, United has estimated that the maximum amount of truck traffic leaving the pit and entering the County road system south of the Mamm Creek exit is 10%. The addendum to the traffic study, included in Appendix D, is based on this level of impact. 2. Truck traffic will not access the mining operation through residential or commercial areas. 3. We believe that the $1,000,000 insurance to cover any damage to public or private property with Garfield County named as an additional insured is not needed in this case due to the fact that a small percentage of traffic from this pit will utilize the County road system. See the traffic study amendment in Appendix D. 4. The 2.2 mile length of access road from the pit to the Mamm Creek exit is going to be paved prior to mining commencement. The trucks will be covered to mitigate dust. The road will be protected by ensuring that all loaded trucks leaving the site are within legal load limits, as determined by the site truck scale. Additional information concerning the access road is included in the CDOT Access Permit which is located in Appendix D. Scott Pit February 09 R-15 5. A County Access Permit is not needed since the site access is directly onto the CDOT Frontage Road of I-70. Additional information concerning the access road specifications is included in the CDOT Access Permit located in Appendix D. As part of this permit, the frontage road of 2.2 mile length from the pit to the Mamm Creek exit will be paved by United. This permit will expire in January of 2009. United commits to re -applying for this permit and obtaining it as a stipulation to the special use permit. 6. If road damage on a County Road becomes evident due to traffic generated from the Scott Pit operation, road repair or replacement required by the County Road and Bridge Department will be the responsibility of United to the extent that it is evident what portion of the damage is due to their traffic. Scott Pit February 09 R-16 5.17.06 Impacts to Wildlife 1. The entire Scott property has been disturbed to permit irrigation. In recent years, irrigation has been abandoned and considerable tamarisk, Russian olive and knapweed have infested the area. There are no threatened and endangered species of plants on the site. United has committed to a strict weed removal plan to restore the site; even those portions which United will not disturb. United has also worked extensively with Will Spence of the CDOW, who has not identified any threatened or endangered animal species on site. Only 14 species of fish are native to the upper Colorado: the Colorado pikeminnow, bonytail, humpback chub, razorback sucker, Colorado River cutthroat trout, Rocky Mountain whitefish, roundtail chub, speclded dace, Kendall Warm Springs dace, flannehnouth sucker, mountain sucker, bluehead sucker, mottled sculpin and the paiute sculpin. However, there are numerous non-native species of fish competing for habitat. Approximately 2 miles downstream of the pit on the Colorado River is the start of the endangered species habitat for the Colorado pikeminnow, razorback sucker, bonytail and humpback chub. The operation will not affect the River downstream in any way, since all runoff and discharge will be carefully regulated and water loss from evaporation will be offset by reducing consumption by irrigation. Prior to stocking fish in the reclaimed lakes, the landowner will consult the CDOW for guidance. The bald eagle has been removed from the endangered species list and an eagle pair has built a nest east of the pit. The eagles nest located on the La Farge property to the east has been extensively addressed in Exhibit H. This includes a number of mitigation measures that have been chosen to lessen any chance that the eagles could be disturbed due to the operation. United worked extensively with Will Spence concerning these mitigation measures. A letter was received from the CDOW regarding the plan, which is included in Exhibit H. 2. A Wildlife Impact Analysis Report with a discussion of the wildlife resources on site, is included in Exhibit H. This information was provided by Westwater consultants and Greg Lewicki. It should be noted that the CDOW has said from the beginning that this plan is one of Scott Pit February 09 R-17 the best they have seen and it should provide excellent habitat for waterfowl and other wildlife once the pit is reclaimed. In addition, by removing the extensive weed infestations on the property, the site will also be improved for forage by big game animals. Scott Pit February 09 R-18 5.17.07 Compatibility with Surrounding Land Uses 1. The abutting properties the North and East have the same use (sand and gravel mining and processing) as the Scott Pit. The abutting property to the west, owned by CDOT, is unused and will not be negatively affected by this operation. It is likely that any future use of this property will be road related and would likely occur after the mine is reclaimed. The abutting property to the south is I-70, which will be unaffected by the operation. 2. The is no existing residence within 300 feet of the Scott Pit permit boundary, therefore, there will not be any equipment storage within 300 feet of a residence. 3. Loading and unloading of vehicles will be conducted within the Scott Pit permit area, which is located on private land. 4. The facilities area is located in Mining Area 2 Phase 4 (2.95 acres) and will be the primary storage area. The crusher / screen will be located in the active pit for a majority of the operation, while the crusher / screen is on site. The crusher / screen will occupy approximately 2 acres. All other storage will be for product stockpiles. Additional information on storage areas is shown in Exhibit D — Mine Plan. 5. Only minor lighting is contemplated at the scale and office trailer. Any lighting shall be pointed downwards and inwards to the property center and shaded to prevent direct reflection on adjacent property. 6. All adjoining land uses are industrial. The reclaimed land use should be compatible with any future use of the surrounding properties. The reclaimed lakes and wetland fringe areas should provide a very pleasing visual setting to westbound travelers along 1-70. Scott Pit February 09 R-19 7. The Scott Pit should be considered as a replacement of the United Companies Chambers Pit and not an additional pit because the Chambers Pit has exhausted its reserves and will no longer be mined once the Scott Pit is opened. For this reason, the Scott Pit should be evaluated as a change of source; not an additional source that will create new cumulative impacts. Glen's Pit Roads- CDOT accounted for the traffic from Lafarge's Mamm Creek Site as well as from the Scott Pit when the Access Permit was issued. Air — The Colorado Air Pollution Control Division will regulate the air pollution generated from the Scott Pit. When issuing an air permit, the Division researches the surrounding air pollution sources and accounts for the cumulative impacts. If a pit is located in an area which has substantial existing emissions, a new pit may not be allowed or could be severely restricted for emissions. The Scott Pit will not create any non-mitigatable impacts to air quality. Water — The Scott Pit will not create non-mitigatable cumulative impacts to the water quality of the Colorado River. The main water quality parameter of concern in the discharge effluent from gravel pits is suspended solids. The Scott Pit discharge water will be limited to 30 mg/1 of suspended solids which is comparable to low flow conditions in the Colorado River. During high flows, the Colorado River can have suspended solid levels reaching 2000 mg/1, therefore the pit will be discharging water substantially better in water quality than the River itself. No chemicals are used in the mining or processing operations. Other — The Scott Pit will not create any non-mitigatable cumulative impacts to other resources and amenities. There are strict controls on the timeliness of the reclamation for visual impacts, as described in the mine plan. Impact mitigation for the mining operation is discussed in Exhibit D. 8. Unless otherwise determined by the Board of County Commissioners, the gravel pit hours of operation will be from 6:00 AM to 8:00 PM. Monday through Saturday with crushing, Scott Pit February 09 R-20 digging, and heavy hauling from 7:00 AM to 6:00 PM allowing for administrative and maintenance activities to take place until 8:00 PM. No operations except emergency maintenance to ensure the integrity of operating equipment shall take place on Sunday. Scott Pit February 09 R-21 5.17.08 Reclamation / Enforcement 1. Slopes The majority of the slopes of the wetland area and the dryland area can only be feasibly replaced at 3H:1V because of the following reasons: 1) Limited size of the operation. Both mining areas are very small: Mining Area 1 is 7.1 acres and Mining Area #2 is 13.9 acres. The operation has been drastically cut back from earlier plans. If the operation were any smaller than this, it is not feasible to permit it, 2) Ramps of approximately 25 feet width will be left at both lakes which are approximately 10H:1 V slope and these will be blended into the surrounding slopes. This will also help blend the reclaimed site into the terrain. The undulating natural appearance of the lakes will also help achieve this goal, 3) This site does not have a significant amount of fines or overburden to be used as backfill. United has already committed to mining to a slope of 2H:1 V and replacing these slopes to a minimum of 3H:1 V. As shown on Map F-2, wetland shelves will be created if additional import material is available. Import material is basically material that is excess from another project site in the area, where some cut material cannot be placed on that site and it must be exported. It is then imported to the mining pit, where it can be used as backfill. United will do the best it can to encourage import material, which can be used to create milder slopes and 4) Most importantly, the intent of the regulation requiring 5H:1 V slopes is for visual blending of the surroundings. The vertical height of slope that will be visible from I-70 is only 5 feet from water level to the original undisturbed ground and it will be nearly impossible to detect the difference between a 3H:1 V slope and a 5H:1 V slope for such a short vertical height, especially when travelling at 70 miles per hour. 2. Vegetation The plan commits to replacing all dry slopes and upland areas with a dryland seed mix and mulch, which is described in Exhibit E — Reclamation Plan. A wetland seed mix will be used along the final lake level to establish a wetland fringe in these areas. The species list for both of these mixes is shown in Exhibit E. In addition, cottonwood saplings and trees will be planted as shown on Map F-1. Twenty Scott Pit February 09 R-22 cottonwood trees of 2" caliper will be planted within 6 months of lake filling at each of the two lakes. This timeframe is needed to ensure that the trees are planted at the right level to receive the appropriate amount of moisture from the lakes. The trees will be placed approximately 2 feet above the final lake water level. The trees will be planted near the transition from dryland to wetland area on the 3H:1 V slopes. 3. Lake / Pond Shape and Character The two ponds created during mining will have approximately 17.8 acres of water surface combined. There is a large land area between the two ponds and there is an undulating nature of the shoreline to the lakes. They will not appear like they were mined. They will look natural after reclamation. The percentage of land left undisturbed within the permit boundary is well over 20%. As is seen on Map F-1, significant peninsulas also exist in both reclaimed lakes. Map F-3 shows a simulated photo rendering of what the lakes would look like after reclamation. 4. All of the disturbance created by mining will be bonded through DRMS. Based on experience with many counties and other gravel pits in Colorado, the State Attorney General will not allow the county to hold a reclamation bond for a mining operation. This is the sole responsibility of the DRMS. 5. All conditions agreed upon during the County special use permitting process will be resubmitted to the DRMS and will be included in the DRMS calculated bond. 6. United Companies will submit an annual report to the County Building and Planning Department with GPS measurements shown on a map showing the current disturbance, what areas have been backfilled, where topsoil stockpiles are located, all site structures, what areas have been seeded, mulched and what is planned for the ensuing 12 months. 7. United Companies will allow an inspection of the site by a designated County inspector with site personnel within 24 hours of being notified by the County. Scott Pit February 09 R-23 8. The County can request a site inspection within one days notice to United. All paperwork will be accessible within 24 hours of the site inspection notice. 9. Any person at any time can call the following agencies directly and request an inspection if they believe a condition of that agencies pennnit is being violated. a. CDPHE Air Quality Control 303-692-3150 b. CDPHE Water Quality Control 303-692-3500 c. US Army Corps of Engineers 970-243-1199 d. Division of Reclamation, Mining and Safety 303-866-3567 e. CDOT Grand Junction Office 970-248-7000 10. The County will be invited to any bond release inspection of the State Division of Reclamation, Mining and Safety. The county inspector will have the opportunity to demonstrate that any item of the permit has not been complied with and that bond should not be released. 11. United Companies acknowledges that the County has performance standards in place that could lead to revocation of the Special Use Permit if continued violations of the permit occur over a period of time. 12. United Companies understands that the County Special Use Permit will not be issued until all other permits are submitted to the County. The County will continue the approval process without all other permits. 13. The reclamation plan approved by Garfield county in the Special Use Permit shall be resubmitted to the DRMS to become the only reclamation plan (tasks/timetables) used by both the County and DRMS. Additionally, a bond shall need to be calculated to cover this plan and secured with DRMS to cover its implementation. 14. An initial weed survey has been conducted and the principal weed locations are shown on Map C-1. The weed management plan is included in Exhibit J. Scott Pit February 09 R-24 SPCC PLAN AND NPDES PERMIT APPENDIX A Permit Number COG -500000 Facility Number COG -500119 CDRMS Permit No. M-1979-205 Page 1 Colorado Discharge Permit System Regulations CERTIFICATION under DISCHARGES ASSOCIATED WITH SAND AND GRAVEL MINING AND PROCESSING OPERATIONS (AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) Category 07, Subcategory Irl, Current annual fee $270 (CRS 25-8-502) This certification specifically authorizes Oldcastle SW Group Inc., dba United Companies of Mesa County to discharge in accordance with the General Permit for Sand and Gravel Mining and Processing Operations (and other nonmetallic minerals except fuel). All correspondence relative to this facility should reference the specific facility number, COG -500119. Permittee Oldcastle SW Group Inc., dba United Companies of Mesa County P.O. Box 3609 Grand Junction, CO 8I502 Phone: 970-243-4900 Contact Bill Bailey, Rifle Area Manager Phone: 970-625-3738 Fax: 970-625-5605 Coverage Under This Renewal Permit The Division has recently renewed this general permit. Permittees who have been covered under the previous general permit and reapplied in a timely manner will automatically be covered under this renewal general permit without lapse in permit coverage. Permit fees previously paid will also automatically be transferred to this renewal general permit. Permittees will need to comply with the terms and conditions of the new permit beginning July 1, 2008. In the interim, the permittee shall comply with the terms and conditions set in the previous certification. As before, only discharges to surface waters of the State are covered. The Colorado Division of Reclamation, Mining, and Safety (CDRMS) has authority over discharges to ground water from sand and gravel mining and processing operations. There have been several changes to the permit. Please see the rationale. Project Name, Activity and Lacatlon Rifle Pit (Chambus Pit) - The facility is located at 27858 US Hwy 6 & 24, Rifle (Garfield County), CO; Latitude: 39.53362° north, longitude: 107.74598° west. Construction sand and gravel are produced at this site. Ground water is discharged from the site. Outfalls Outfalls Description Estimated Flow Rate OOIA The discharge from a settling pond located in the central western portion of the site, Avg.= 1.224 MGD prior to entering the Colorado River. Effluent Parameters The discharge goes to the Colorado River, within Segment 01 of the Lower Colorado River Sub -basin, Lower Colorado River Basin. This segment is found in the Classifications and Numeric Standards for the Lower Colorado River Basin (Regulation No. 37; last update effective March 1, 2008). Segment 01 is designated as Reviewable and is classified for the following beneficial uses: Aquatic Life, Class 1 (Cold); Recreation, Class la; Water Supply; and Agriculture. Effluent Limitations and Monitoring Requirements for Permit, Part I.B.I.b.—Construction S&G Parameter Limitations 30 Day 7 -Day Avg. Avg. Daily Max. Rationale Monitoring Frequency Sample Type -._--w------------------------General Permit Requirements --------------------------------- Flow, MGD pH, s.u. Oil and Grease, mg/1 Total Suspended Solids, mg/1 Report N/A N/A 30 NA Report Discharge Evaluation NA NA 45 6.5-9.0 10 NA Water Quality Standards State Effluent Regulations State Effluent Regulations Continuous / Instantaneous2 2 Days/Month 2 Days/Month 2 Days/Month Recorder / In-situ 2 Grab Visual 3 Grab -Site-Specific Requirements --------------------------------- Total Dissolved Solids, mg/I Report z— If power is not available, flow may be measured on an instantaneous basis. Facility shall monitor flow 2 days / month, 3 -- If a visual sheen is noticed, a grab sample must be taken and analyzed for oil and grease NA Report Salinity Regulations Quarterly Grab ISSUED: JUNE 16, 2008 EFFECTIVE: JULY 1, 2008 EXPIRATION: JUNE 30, 2013 Permit Number COG -500000 Facility Number COG -500119 CDRMS Permit No. M-1979-205 Page la Other Conditions Chemicals The permittee did not specify any chemicals for use in waters that may be discharged. On this basis, no chemicals are approved under this permit. Prior to use of any applicable chemical, the permittee must submit a request for approval which includes the most current Material Safety Data Sheet (MSDS) for that chemical. Until approved, use of a chemical in waters that may be discharged could result in discharge of pollutants not authorized under the permit. Antidegradation An antidegradation (AD) analysis may apply in the future if additional parameters are added to this certification. No current limits are water quality -based, thus antidegradation does not apply. Groundwater Contamination If groundwater contamination is encountered, then the permittee is to contact the Division and, if appropriate, the owner of the collection system receiving the discharge. Since the discharge of contaminated groundwater is not covered under this permit, the permittee shall immediately apply for a groundwater remediation certification, which will include appropriate requirements for additional discharge monitoring and on-site environmental response capabilities. Sampling Sampling shall occur at a point after treatment, or after the implementation of any Best Management Practices (BMPs). If BMPs or treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee, and prior to entering the receiving stream. Samples must be representative of what is entering the receiving stream. Monitoring and Reporting Discharge Monitoring Reports (DMR) must be submitted quarterly as long as the certification is in effect. The permittee shall provide the Division with any additional monitoring data on the permitted discharge collected for entities other than the Division. This will be supplied to the Division within 48 hours of the receipt of the data by the permittee. This certification to discharge is effective long term. For termination of permit coverage, the permittee must initiate this by sending a letter to the Division requesting the permit certification be terminated. Best Management Practices The permittee shall implement and maintain Best Management Practices (BMP) for the prevention of erosion and the control of solid and liquid pollutants due to the discharge. BMPs include various options, such as: modification of the pipe discharge structure to disperse flows; containment of water by hay bales or other comparable structures; the use of geocloth, filter fabric, or plastic sheeting for protection of containment structures; rip -rap; and/or any other approved methods. Stormwater Management Plan See Part I.C. of the permit for stormwater requirements. At the time of application, the permittee certified that they had developed and implemented a Stormwater Management Plan (SWMP) for this facility. The permittee shall amend the SWMP whenever there is a change in design, construction, operation, or maintenance which has a significant effect on the potential for the discharge of pollutants to the waters of the State, or if the SWMP proves to be ineffective in achieving the general objectives of controlling pollutants in stormwater discharges associated with mining activity. A copy of the SWMP must be kept on site and provided to the Division upon request. The General Permit for Sand and Gravel Mining and Processing Operations (and other nonmetallic minerals except fuel) is attached. The permittee should review this permit for familiarity with all of the permit requirements. If the permittee has questions related to this certification that cannot be answered by a review of the permit, the permit writer should be contacted. Permit Writer Erin Scott 303-692-3506 May 27, 2008 5,41. WarfA November 21, 2008 t x iE 47 (M 3) 34 196 F41/:: (.3t3)-3 - gad E 1.;fk. info(#?,l :0.waa Erin Scott Colorado Department of Public Health and Environment Water Quality Control Division 4300 Cherry Creek Dr South Denver, CO 80246-1530 RE: Scott Pit NPDES Application Attached is a new application for a NPDES Permit for the Scott Pit. There will be two discharges of groundwater to the wetland/oxbow area. See attached map General Area — NPDES. Discharge Point 001 is located on the northern portion of Mining Area 1. Discharge Point 002 is located on the northwest portion of Mining Area 2. The groundwater will continue to be filtered through gravel berms prior to pumping to prevent clouding of the receiving waters. Please give me a call if there are any questions or additional information needed. Sincerely Ryan Ellis, Greg Lewicki and Associates (303) 880-6690 WATER QUALITY CONTROL DIVISION COLORADO DISCHARGE PERMIT SYSTEM APPLICATION DISCHARGES ASSOCIATED WITH SAND AND GRAVEL PRODUCTION OPERATIONS FOR STORMWATER and PROCESS WATER (AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) This application is for use by all industrial process and/or stormwater dischargers engaged in sand and gravel production operations, and other nonmetallic minerals (except fuels). This application is for both active and inactive mining operations and concrete and asphalt batch plants at the mine. This application is for coverage under a general or individual permit. This form may be reproduced. For information on electronic copies, please contact the Permits and Enforcement Section at (303) 692-3500. It is suggested that the applicant contact the Division of Mining and Geology at the Colorado Department of Natural Resources, concerning reclamation rules and regulations at (303) 866-3567. WATER RIGHTS The State Engineers Office (SEO) has indicated that any discharge that does not return water directly to surface waters (i.e. land application, rapid infiltration basins, etc.) has the potential for material injury to a water right. As a result, the SEO needs to determine that material injury to a water right will not occur from such activities. To make this judgement, the SEO requests that a copy of all documentation demonstrating that the requirements of Colorado water law have been met, be submitted to their office for review. The submittal should be made as soon as possible to the following address: Colorado Division of Water Resources 1313 Sherman St. Rill 818 Denver, Colorado 80203 Should there be any questions on the issue of water rights, the SEO can be contacted at (303) 866-3581. It is important to understand that any CDPS permit issued by the Division does not constitute a water right. Issuance of a CDPS permit does not negate the need to also have the necessary water rights in place. It is also important to understand that even if the activity has an existing CDPS permit, there is no guarantee that the proper water rights are in place. GENERAL INSTRUCTIONS Application Due Dates: At least thirty (30) days prior to the anticipated date of discharge, the owner (or operator if the owner does not operate the facility) of the facility shall submit an application as provided by the Water Quality Control Division (the "Division"). Permit Fee: Do not send any payment with this application. You will be billed once you are covered under a permit. Application Completeness: All items of the application must be completed accurately and in their entirety or the application will be deemed incomplete, and processing of the permit will not begin until all information is received. If you have questions on completing this application, you may contact the Division at (303)+692-3500. Two copies of the completed application shall be submitted, only to: SPECIFIC INSTRUCTIONS Item 1, 2 - Colorado Department of Health WQCD-P&E-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 Provide the name and address of the permit applicant and property owner, including the company name, local contact, and mailing address. Indicate whether the applicant is the owner or operator of the facility. Include the applicant Federal Taxpayer Identification or Employer Identification number (nine digits). This number will be used as an identifier for billing purposes. Bern 3 - For the approximate center point of the property, both types of descriptions (legal, in terms of Township, Range and 1/4 section, and longitude/latitude, to the nearest 15 seconds) must be included. Item 4 - The Standard Industrial Classification (SIC) Code or codes for the facility must be listed. SIC Codes are assigned according to the primary activities performed by a company. The first part of the SIC Code for most facilities covered under this general permit is 14. The second part of the code will indicate the type of mine, such as sand and gravel, clay or gypsum. (Also include the SIC Code for a concrete or asphalt batch plant if applicable.) See Appendix A for a summary list of SIC Codes. Item 5 - Identify the receiving water, Receiving waters are any waters which are contained in or flow in or through the state of Colorado (except water withdrawn for use until use and treatment have been completed). This definition includes all water courses, even if they are usuall dry, Item 6 - Self explanatory. Item 7 - Indicate whether or not your facility has or is subject to the following environmental permits (not including the one now being applied fc Item 8 - a) Indicate your Mined Land Reclamation Board permit number in item 7.a. The anniversary date of your mining permit issuance by tl Colorado Mined Land Reclamation board is also required. b) If you currently have a permit from the Division for the discharge of stormwater, include the number in item 7.f. This application covers the discharge to receiving waters of two types of effluent: process water and stormwater. It is anticipated that, generally, all nonmetallic minerals production operations will come under the stormwater portion of the application, while only some of operations will also have a discharge of process water. Process water discharges: Submittal of this application is required if you discharge any process waters. Process generated wastewater include: product wash water, maintenance/equipment wash waters, transport waters, scrubber waters (crushers or classifiers), mine dewatering (groundwater and/or runoff), and stormwater runoff which mixes with process generated wastewater prior to sampling. If yo discharge includes any of these sources, you must complete items 9 - 19 of the application as well. If you answered 'no' to all the questions, please skip to item 18. Stormwater discharges: Submittal of this application is required from nonmetallic minerals production operations if there is a possibil of discharge of stormwater that can come into contact with any overburden, raw material, intermediate products, finished products, byproducts or waste products located at the site of such operation, except as specified above under process water. For example, runoff haul roads, equipment storage areas, or shipping and receiving areas would be considered a stormwater discharge. Item 9 - This map is indicated to serve as an area map attachment to the permit. A legible submittal is required. The map should be on paper 8 1 11 inches. Item 10 - This is a facility sketch for inclusion in the permit, A legible submittal is required. The sketch should be on paper 8 / x 11 inches. Item 11 - If you answered YES to any of these questions, include an explanation of the situation, For example, explain why you suspect or know groundwater contamination, and what has been done to remedy the situation. Include any applicable analytical data. Item 12, 17 - Self explanatory. Item 18 - This requirement applies to all facilities. Completion of a Stormwater Management Plan (SWMP) is required. (Submittal of the ac plan is not required.) The permit application shall include a signed certification that the SWMP has been completed. For a detailed list SWMP requirements, see Appendix B of the application. Item l9 - The application must be signed by both the operator and owner to be considered complete. The person who is applying for the permit owner or operator, as indicated in item 1) and who signs the application will be the legally responsible party. In all cases, it shall be sign, follows: a) In the case of corporations, by a principal executive officer of at least the level of vice-president or his or her duly authorized representative, if such representative is responsible for the over-all operation of the facility from which the discharge described in thi application originates, b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, or other duly authorized employee. 2 PROCESS WATER AND STORMWATER DISCHARGES ASSOCIATED WITH SAND AND GRAVEL PRODUCTION OPERATIONS (AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) FOR AGENCY USE ONLY r PERMIT NUMBER C 0 DATE RECEIVED YEAR MONTH DAY TYPE: P S Please print or type, Do not attempt to complete this form before reading the instructions. New ® or Renewal ❑ If renewal, existing permit number: CO 1, Name and address of permit applicant: Company Name: Oldcastle SW Group Inc., United Companies of Mesa County Federal Taxpayer (or Employer) ID#: Mailing Address: 2273 River Road, P.O. Box 3609 City, State and Zip Code : Grand Junction, CO 81502 Phone Number: ( 970 ) 243-4900 Local Contact (familiar with facility): Pete Siegmund Title: Vice President Phone Number: ( 970) 243-4900 Who is applying for the permit? ❑ Owner 0 Operator 2. Name and address of property owner Name: Rivers Edge LLC Fax No,:( 970 )243-5945 Mailing Address : P.O. Box 1556 City, State and Zip Code : Rifle, CO 81650 Phone Number:( 970) 625-5644 FaxNo.: ( 970 )625-5644 3. Location of the facility: Street Address: 0001 County Road 315 City, State and Zip Code: Rifle, CO 81650 County: Garfield Name of facility: Scott Pit Legal Location (Township, Range, section, 1/4 section): T 6 S , R 93 W , Sec 15, NE 1/4 Latitude and Longitude: 39 deq 31.6553 ' N 10 7 deg 45.4414' W 3 4, Standard Industrial Classification (SIC) Code(s) for this facility. (Include up to four, in order of importance. See Appendix A.) a) 1442 b) 2951 c) 3273 (I) 5. Receiving Stream: The name of the receiving stream(s). (If discharge is to a ditch or storm sewer, also include the name of the ultimate receiving waters.) an oxbow of the Colorado River 6, Industrial Activity: Describe the primary industrial activities which take place on site (e.g., sand and gravel mining, gypsum mining, sand washing, gravel crushing, stationary or mobile asphalt/concrete batch plants, etc.), Indicate the status of the facility (active, inactive, being reclaimed, etc.) Sand and Gravel Mining, Gravel Crushing, Asphalt/Concrete Batch Plants 7. Other environmental Permits: Does this facility currently have any other environmental permits, or is it subject to regulation, under either of the following programs? Permit Name Yes No Applied For, Date Permit No. a.) Colorado Division of Minerals and Geology (formerly MLRD) X b.) Underground Injection Control c.) Dredge or fill permit under Section 404 of the Clean Water Act (CWA) (Army Corps of Engineers) d.) Resource Conservation and Recovery Act (RCRA) e.) CDPS Stormwater f.) Colorado State Air Pollution Emission X Not Submitted g,) Other If Yes to item 7.a), please include Colorado Division of Minerals and Geology (Mined Land Reclamation Board) permit anniversary date: August 15 4 8. Stormwater vs. Process Water Do you discharge any of the following process generated wastewaters from your facility, to state waters? X X X Nol I Yes NoP Yes Nol Yes ❑ No Yes Product wash waters Maintenance/equipment wash waters Transport waters (e.g., slurries) Scrubber waters (crushers or classifiers) ❑ Nal l' I Yes Mine dewatering (groundwater and/or runoff from the mine) If you answered YES to any of these questions, continue on to Item 9. If you answered NO to all of these questions, skip to Bern 18. 9. Location map: A location map designating the facility property, discharge points and receiving waters shall be submitted. The map shall be from a 71/2 or 15 minute USGS quad sheet, or a map of comparable scale. A north arrow shall be shown. The map must he on paper 8 Si x 11 inches. 10. Site Sketch: A legible general sketch of the site shall be submitted, showing appurtenant facilities (buildings, ponds, diversion ditches, stockpiles, etc.), stream location, numbered discharge points, sampling and flow monitoring points. The map must be on paper 8 1/2 x 11 inches. The outfalls shall be labeled to correspond with the numbers listed in 15. 11, Site-specific conditions: a) Does this facility have bulk storage of diesel fuel, gasoline, solvents, fertilizer, or other hazardous materials on site? No #3IYes b) Is this operation located within one mile of a landfill, or any mine or mill tailings? No X❑ Yes c) Does the dewatering area have or possibly have groundwater contamination, such as Plumes from leaking underground storage tanks, etc.? Ex - No Yes If YES for any of these, please show location of the landfill, tailings or possible groundwater contamination on the location map in item 8 or in the general sketch in item 10. Please explain the location, extent of contamination, and possible effect on the discharges from this facility. 5 12. Chemical treatment: Will any flocculants (settling agents or chemical additives) be used to treat water prior to discharge? 0 No Yes If YES, list here, and include the Material Safety Data Sheet (MSDS): Chemical Name * Manufacturer Purpose In Which Waste Stream? * If the chemical formula is unknown or confidential, provide the manufacturer's name, contact person, address and phone number or a copy of the manufacturer's brochure, product label information or materials handling data sheet for each product used. Please list the major constituents or active ingredient(s), if known. 13. Are the receiving waters, indicated in item 5, a ditch or storm sewer? I"I No Yes If YES, submit documentation that the owner of the ditch or storm sewer allows this discharge. No certification will be processed unless documentation of approval is received. Note: A discharge permit does not allow a discharge into a ditch or municipal storm sewer system without the approval of the owner/operator of that system. Please provide documentation of approval from the ditch company or owner of the storm sewer for all new discharges. 14. Plow measurement: What method of flow measurement will be used for each discharge point (e.g., v -notch weir, pump capacity, parshall flume, etc.)? Pump Capacity 6 15. Outfalls - For each process water outfall, provide a description of: all operations contributing wastewater to the effluent, including water associated with product crushing or washing, equipment washing, sanitary wastewater, groundwater; - the average flow contributed by each operation; - the treatment received by the wastewater, including an identification of any chemical additives used. Use additional pages as needed. OUTFALL NUMBER WASTEWATER SOURCE AVG FLOW, MGD* TREATMENT USED DESIGN** FLOW, MGD RECEIVING WATERS 001 Groundwater dewatering 1.224 MGD Gravel germ Colo River 002 Groundwater dewatering 1.224 MGD Gravel Berm Colo River 4 *MGD - Million gallons/day **If sediment pond, indicate approximate volume of water. 16. Water quality data: Analytical data for the following parameters shall be submitted for at least one grab sample from each discharge point. lino water is currently available for analysis, so indicate. Alkalinity (mg/1) pH (s.u.) Total Dissolved Solids (mg/1) COD (mg/1) Total Suspended Solids (mg/1) Oil and Grease (mg/1) X No water to analyze at this time The Division may request analysis of other parameters once the application has been reviewed. 17. Activity duration: When did the activity commence? N/A What is the estimated life of the activity from which the discharge(s) identified in item 15 originate? 6 years. 7 18. STORMWAT'ER MANAGEMENT PLAN This item applies to all facilities. A Storniwater 1'fanagen cnt Plan (SWMP) shall be prepared poor to applying for coverage under the general permit, and the following certification signed. See tate SWMP requirements in Appendix B. "I certify under penalty or law that a complete Stormwatcr Management Plan, in compliance with Appendix B of this application, has been prepared for my facility. Based on my inquiry of the person or persons who manage the system, or Chose persons directly responsible for gathering the information, the SWMP is, to the best of my knowledge and belief, true, accurate, and complete. 1 am aware that there are significant penaltiesialsely etifying the completion of sail ',WMP, including the possibility of fine and imprisonment." H,24 -os Signature of Permit Applicant Date Signed Naive (printed) Title 19. Signature of Applicant "I certify under penalty of law that I have personally examined and am familiar with the information submitted in this application and all attachments and that, based on my inquiry o6 those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate and complete. pos bit ' of tine and -8)4siature of caner 1 t ii Niki N Signature of Operator risontnenf." I am aware that there are significant penalties fir submitting false information, including the Date Signed Titie P-2-1 -rig Date Signed _&/c- �• 5/ Name (printed) Title g t 45 Er)e APPENDIX A INDUSTRY SIC CODES (Summary) SIC Code SIC Code Category/Industry Type Permit Permit Notes Type 1400 Mining and Quarrying of Nonmetallic Minerals, Except Fuels 1410 Dimension stone (a) SG 1411 Dimension stone; mining and quarrying of dimension stone 1420 Crushed and broken stone, including riprap 1442 Crushed and broken limestone (a) SG 1443 Crushed and broken granite (a) SG 1429 Sandstone, and crushed and broken stone not elsewhere classified (a) SG 1440 Sand and Gravel 1442 Construction sand and gravel (a) SG 1146 Industrial sand (a) SG 1450 Clay, ceramic, and refractory minerals 1455 Kaolin and ball clay (a) SG 1459 Shale, clay, ceramic, and refractory minerals, not elsewhere classified (a) SG 1470 Chemical and fertilizer mineral mining 1474 Potash, soda, and borate minerals (a) SG 1475 Phosphate rock (a) SG 1479 Chemical and fertilizer mineral mining, not elsewhere classified (a) SG 1480 Nonmetallic minerals services, except fuels 1481 Nonmetallic minerals services, except fuels - removal or overburden, strip mining, etc. (a) SG 1490 Misc. Nonmetallic minerals, except fuels 1499 Borrow pits, misc. Nonmetallic minerals not elsewhere classified, Such as gypsum, mica, peat, pumice, talc, etc. (a) SG 2951 Asphalt batch plants (b) SG, C, L 3273 Ready -mix concrete facilities (b) SG, C, L Notes : (a) For this SIC Code, a stormwater permit is required only if runoff contacts overburden, raw material, intermediate or finished product, or waste products. (b) Asphalt and concrete batch plants at sand and gravel operations may be covered under permit SG ; facilities at construction sites may be covered under permit C; other facilities, including mobile plants, may be covered under permit L. Permit types: SG: Sand and Gravel General Permit (Permit No. COG -500000) C: Construction General Permit (Permit No. COR -030000) L: Light Industry General Permit (Permit No. COR -010000) A-1 APPENDIX B - STORMWATER MANAGEMENT PLAN (SWMP) 9/97/sg In this document, the text in bold italics is quoted directly from the Sand and Gravel general permit. The text in straight type is provided as guidance in the preparation of your SWMP. The requirement to develop a Stormwater Management Plan (SWMP) prior to application for the general permit applies to all facilities. The applicant shall develop a SWMP for their facility, and certify in Item 8 of the application that it has been completed. The SWMP shall be prepared in accordance with good engineering practices. (The plan need not be completed by a registered engineer.) The plan shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of stormwater discharges associated with the mining activity. In addition, the plan shall describe and ensure the implementation of Best Management Practices (BMPs) which will be used to reduce the pollutants in stormwater discharges associated with mining activity. BMPs are defined as physical, structural, and/or managerial practices that, when used singly or in combination, prevent or reduce pollution of water. Mining operations must certify the completion of their SWMP, as described in this document. Implementation of the plan will be required at the time that coverage under the general permit begins. The Division reserves the right to request and review the plans, and to require additional measures to prevent and control pollution, as needed. When preparing your plan, make sure to address each item. If it is not applicable to your site, briefly explain why. A simple "Not Applicable" is not enough. Also note that the SWMP should include any existing stormwater controls at your site, not just new or proposed ones. Take full credit for what you are already doing. The SWMP shall include the following items, at a minimum: I. Site Map The plan shall provide a site map or maps which indicate at a minimum: Mining site boundaries - Access and haul roads Stormwater outfalls and an outline of the drainage area of each stormwater outfall An estimate of the direction of flow Materials handling areas Each existing structural control measure to reduce pollutants in stormwater runoff Areas used for storage or disposal of overburden, materials, soils or wastes Areas used for mineral milling and processing Springs, streams, wetlands and other surface waters Location of mine drainage or any other process water Boundary of tributary area that is subject to effluent limitations Date the map was prepared The drainage areas shown should include the portions of the site where industrial activities occur, as well as those portions contributing stormwater that mixes with runoff' from the industrial area. Therefore, the entire drainage area where industrial activities occur must usually be included. Aside from mining, industrial activities can include equipment washing, materials storage, vehicle maintenance or fueling, incineration, waste treatment, storage or disposal, shipping/loading/unloading, etc. You do not need to include industrial activities which only take place indoors, unless there is some part or aspect of the activity with which stormwater could come in contact. For example, if all vehicle maintenance is done indoors, but vehicle storage or fueling is outside, the vehicle storage or fueling area must be addressed. It is a good idea to start with a portion of the USGS (U.S. Geological Survey) quadrangle map showing the site. These are available and easily obtainable for the entire state; they show a large amount of information for very little effort. You can then use the USGS map as a guide for preparing your site map, which will be more detailed. Regardless of the source of the base map, the site map needs to be of suitable scale to show the industrial portion of the facility and the features within it. - Locations of stormwater outfalls: If the site has a stormwater drainage system, the location of outfalls is a simple task. Indicate on the map where pipeline outfalls are, as well as the general layout of the drainage system such as inlets, grates, pipelines, etc. If stonnwater is conveyed over land without a developed storm drainage system, the points where runoff collects and runs off must be located. Drainage basins for each outfall: Field inspection can usually accomplish this task with acceptable accuracy. Look for high areas such as crests of parking lots, roads, eta which would form the division between drainages. Gullies and swales are indicators of stormwater flow direction. Obviously, if runoff is observed during a storm, most uncertainties can be eliminated. - Surface water bodies (including dry water courses): Mark on the site map any surface water bodies, including lakes, streams, springs, wetlands, detention ponds, roadside or irrigation ditches, etc. These do not necessarily need to be within the facility, but may be adjacent to it or impacted by stormwater runoff. Also include any existing storm sewers. - Existing structural control measures to reduce stormwater pollution: Show on the map the location of any structural stormwater pollution control measures, such as detention ponds, diversion ditches, covered material storage areas, fuel farm secondary containment structures, etc. In addition, there are several other features which could be included to make the SWMP a more comprehensive and usable plan. For example, later sections of the SWMP will include requirements for spill prevention procedures, which can include a site map showing where materials are stored. By including the following items on the site map, all information would be in one place on a single base map. - Materials handling and loading areas - Materials storage areas - Paved and unpaved areas (for hydrologic assessments) 2. Description of Potential Pollutant Sources/Material Inventory The plan shall provide a description of all potential sources (activities and materials) which may reasonably be expected to add pollutants to stormwater discharges. Such sources may include haul roads, equipment storage and maintenance areas, fuel storage areas, etc. In each case where stormwater pollution potential exists, appropriate preventive measures must be taken and documented This section of the SWMP summarizes the existing potential for stormwater contamination at the site. It is a narrative description which states what is stored, where it is stored, how it is used, what has been used, etc. These can include such pollutants as fuels, oils, detergents, pesticides, herbicides, fertilizers, etc. 3. Stormwater Quality Controls Each mining she covered by this plan shall develop a description of stormwater quality controls appropriate for that site, and implement such controls. The appropriateness and priorities of controls in the plan shall reflect identified potential sources of pollutants at the site. The description of stormwater quality controls shall address the following minimum components, including a schedule for implementing such controls: This section of the SWMP, when completed, will spell out what the facility is doing to control stormwater pollution, what the facility will do in the future, when Best Management Practices (BMPs) will be implemented, and who at the facility is responsible for the plan. a) SWMP Administrator- The SWMP shalt identify a specific individual or individuals within the mining organization who is responsible for developing the SWMP and assisting the mine operator in its implementation, maintenance, and revision. APPENDIX A - SWMP (cont.) Page B-3 The SWMP Administrator becomes the contact for all SWMP-related issues and is the person responsible for its accuracy, completeness, and implementation. Therefore, the SWMP Administrator should be a person in an authoritative position. Larger facilities may want to develop a "SWMP team" in order to share the responsibilities and generate greater awareness and participation. b) Materials Handling and Spill Prevention - Where materials can impact stormwater runoff, BMPs that reduce the potential for contamination shall be described. For example, materials should be stored and handled in covered areas whenever possible to prevent contact with stormwater; fuels and other chemicals should be stored within berms or secondary containment devices to prevent leaks and spills from entering stormwater runoff When selecting BMPs, the most important ones to evaluate first are those which limit the source of the pollutant. It is much more efficient, from both a cost and environmental standpoint, to prevent the pollution in the first place than to clean up contaminated stormwater. For example, a BMP requiring that any vehicle maintenance that involves fluid exchange must take place indoors, results in the removal of a pollutant source (i.e., oillhydraulic fluids) from possible contact with stormwater. Good housekeeping measures, such as cleaning and maintenance schedules, trash disposal and collection practices, grounds maintenance, etc., can be included here, c) Erosion and Sediment Controls - Describe BMPs that will be used to reduce erosion and prevent sediment delivery to State waters. These should include structural (such as silt fences, sediment ponds, drop structures, check dams) and non- structural (such as mulching and revegetation) methods. BMPs can describe a wide range of management procedures, schedules of activities, prohibitions or practices and other management practices. BMPs can include operating procedures, treatment requirements and practices to control plant site runoff, drainage from raw materials storage, spills or leaks. Nonstructural BMPs are mainly definitions of operational or managerial techniques. Structural BMPs include physical processes ranging from diversion structures to oil/water separators to retention ponds. The BMPs selected are up to the judgment of the individual permittee. However, it is important to note that a fully implemented SWMP will constitute compliance with Best Available Technology (BAT) and Best Conventional Technology (BCT), as mandated under the Federal Clean Water Act. This means that, in order to comply with your permit, the appropriate measures must be taken in keeping with the pollutant(s) involved and the risk potential at the facility. d) Identification of Discharges other than Stormwater - The stormwater conveyance system on the site shall be evaluated for the presence of discharges other than stormwater, such as mine drainage, spoil springs, sanitary waste, or process water of any kind. The SWMP shall include a description of the results of any evaluation for the presence of discharges other than stormwater, the method used, the date of the evaluation, and the on-site drainage points that were directly observed during the evaluation. A number of discharges other than stormwater may not require a CDPS Industrial Wastewater Discharge permit and are considered Allowable Non-Stormwater Discharges. Flows from fire fighting activities, landscaping irrigation return flow or springs (except spoil springs) that are combined with stormwater discharges associated with industrial activity must be identified in the SWMP. In other words, only stormwater can be conveyed by the stormwater drainage system. Examples of potential illicit connections include floor drains and toilets in maintenance buildings, chemical storage buildings, etc. There are several methods of determining whether or not illicit connections exist. Acceptable procedures include dry weather observations of outfalls or other appropriate locations, analysis and validation of accurate piping schematics, dye tests, etc. Note - if illicit connections are discovered, corrective measures must be taken. 0 Q D z _tib4-0 id 100' rrir 1 w€� s 7 Fere nit Boundary ./, //L_ake from Previous//. / Gravel Mlining// j J �j! jj Mining,// / j ///-/j7j.�//,/ / "7i ///i� /-/ /./ / It s rr If Ls s e; Point 002 1:1 pe at 1 s. 191 Notes: Revisions BY DATE DES RE DRN RE CHK APPD DATE 12/19/08 SCALE 1" = 400' Site Plan - NPDES Scott Pit United Companies Scott Pit SPCC Plan Table of Contents Management Approval and Review [112.5 and 112.7(d)(2)] i Professional Engineer's Review 1112.3(d)] Introduction 1.0 Purpose 1.1 Using the Plan 1.1.1 SPCC Plan Revisions 1.1.2 Facility Description [1 12.7(a)(3)]_ 1.2 Location and Use 1.2.1 Waterways and Abutters_ 1.2.2 Site Drainage 1.2.3 Potential Spill Sources and SPCC Features 2.0 SPCC Compliance [1 12.7(a)(1) and 1 12.7(a)(2) and 112.8]_ 2.1 Tables [112.7(a)(3)(i and iii) and 112.7(b)] 2.2 Spill Prevention and Response 3.0 Discharge Prevention 3.1 SPCC Features and Operating Procedures [112.7_(a)(3) and 112.8] 3.1.1 Tests and Inspections [112.7(e) and 112.8 (c) (6)] 3.1.2 Training [112. 700)] 3.1.3 Security [112.7(g)] 3.1.3 Emergency Response [1 12.7(a)(3)(iv) and 112.7(c) 3.2 Minor Spill Response [112.7 (a)(3)(iv)] 3.2.1 Major Spill Response [112.7 (a)(3)(iv)] . 3.2.2 Waste Disposal [112. 7(a)(3)(v)] 3.2.3 Notification and Reporting [112. 7(a)(4)] 3.2.4 Required Facility Improvements 4.0 Emergeny Contacts [112.7(a)(3)(vi)] Appendix A Spill Notification Form Appendix B Facility Plans [112.7(a)(3) Appendix C Substantial Harm Criteria Checklist [112.20(e)] Appendix D AST Inspection Checklist Appendix E Employee Training Log Appendix F Spill Prevention From Pit Flooding Appendix G Management Approval and Review [112.5 and 112.7(d)(2)] Management Approval United Companies, the operator of Scott Pit, is committed to the prevention of discharges of oil to navigable waters or the environment, and maintains the highest standards for spill prevention control and countermeasures through periodic review, updating, and implementation of this Spill Prevention Control and Countermeasure (SPCC) Plan. The operator will provide the manpower, equipment and materials required to expeditiously control and remove any quantity of oil discharged that may be harmful. Authorized Facility Representative: Title: Signature: Date: Management Review A review and evaluation of this SPCC Plan will be conducted at least once every three years. As a result of this review and evaluation, the operator will amend the SPCC Plan within six months of the review to include more effective prevention and control technology if: (1) such technology will significantly reduce the likelihood of a spill event from the facility, and (2) if such technology has been field -proven at the time of review. This SPCC Plan will also be amended within six months after a change in the facility design, construction, operation, or maintenance occurs which materially affects the facility's potential for the discharge of oil into or upon the navigable waters of the United States or adjoining shorelines. Any technical amendment to the SPCC Plan shall be certified by a Professional Engineer. Review Dates Signature Amendment Required? (YIN) Scott Pit Page ii Professional Engineer's Review 1112.3 (d)(1)] The undersigned Registered Professional Engineer is familiar with the requirements of Chapter 40 of the Code of Federal Regulations Part 112 (40 CFR 112) and has supervised examination of the facility. The undersigned Registered Professional Engineer attests that this Oil Spill Prevention Control and Countermeasure Plan has been prepared in accordance with good engineering practices including applicable industry standards, and in accordance with the requirements of Chapter 40 of the Code of Federal Regulations Part 112 (40 CFR 112); that procedures have been established for required inspections and testing; and that the Plan is adequate for the facility. Signature Name Title Company Date P.E. Registration Number Scott Pit Page ii 1.0 Introduction 1.1 Purpose The purpose of this Spill Prevention Control and Countermeasure (SPCC) plan is to prevent spills from occurring, and to perform safe, efficient and timely response in the event of a spill or leak (both referred to as "spills" herein). In accordance with United States Environmental Protection Agency (EPA) oil pollution prevention regulations (40 CFR 112), the operator must prepare and implement an SPCC plan for facilities that could reasonably be expected to discharge oil into or upon navigable waters or adjoining shorelines; and, meet one of the following conditions: • Above -ground oil storage capacity exceeds 1,320 gallons; or • Underground oil storage capacity exceeds 42,000 gallons, unless the underground tanks are subject to all of the technical requirements of 40 CFR 280 or a state program approved under 40 CFR 281. (Maine's approved program is Department of Environmental Protection, Chapter 691— Rules for Underground Storage Facilities.) As defined by 40 CFR Part 112, oil includes all grades of motor oil, hydraulic oil, lube oil, fuel oil, gasoline and diesel, automatic transmission fluid (ATF), waste oil, and transformer mineral oil. The definition of oil also includes non -petroleum oils such as animal or vegetable oils and synthetic oils. 1.1.1 Using the Plan In addition to satisfying a regulatory requirement, this SPCC plan should be a working document at the facility. The plan should be used frequently in the following ways: • As a reference for oil storage and containment system information. • As a tool for informing new employees and refreshing existing employees on practices for preventing and responding to spills. • As a guide to periodic training programs for employees. • As a guide to facility inspections. • As a resource during an emergency response. 1.1.2 SPCC Plan Revisions The operator must revise this SPCC plan for any change in the facility design, construction, operation or maintenance that affects the facility's potential for discharging oil. Revisions must occur as soon as possible, but no later than six months after the change occurs, The Facility Manager is responsible for initiating and coordinating such revisions. Additionally, this SPCC plan must be reviewed at least once every three years. Revisions to the plan, if any, must be made within six months of the review. Facility information related to the SPCC plan must be submitted to the United States Environmental Protection Agency (EPA) Regional Administrator whenever the facility discharges more than 1,000 gallons in a single event, or discharges more than 42 gallons of oil in each of two spill events within a 12 -month period. Seat Pit Page 1-1 1.2 Facility Description [112.7(a)(3)] 1.2.1 Location and Use The site lies on the south bank of the Colorado River east of the town of Rifle. The site is adjacent to operating and previously operated gravel pits. Gravel mining began to the north of the site in the 1960's. Three large operating gravel mines surround the site. The MMM Chambers Pit is located directly to the west of this site. The Chambers operation produced the existing pit lake located on Yvonne Chambers Property. Glen's pit lies to the northeast of the site. LaFarge's Mamm Creek Pit lies directly to the south of this pit and the Grant Brothers pit lies to the east. The permit area consists of 93 acres between the 1-70 and the river. Prior to mining, the pit will need to be dewatered. This will be accomplished by installing a perimeter dewatering trench. The trenches will lead to a sump as shown in Map C-2, All maps refrenced in this document can be found in the DMG permit. Water will be allowed to pass through a gravel berm prior to entering the sump. This will act to filter out a portion of the sediment. All discharge will pass through a sediment control pond in order to allow sediment to settle. The sediment control pond will be monitored for build up. If a substantial amount of sediment has accumulated, the pond will be cleaned. The sediment cleaned from the pond will be placed as fill in the area currently being mined. As mining progresses through the phases, the pumping arrangement will continually change. The locations of the pumps and ditches are approximate as shown on the mine plan maps. It is expected that dewatering of a pit will require approximately 1000 gallons per minute pumping capacity. During initial dewatering, the pumping demand may be up to three times the stable pumping rate or 3000 gallons per minute. Once the pit has been dewatered, mining will begin. Primarily, front-end loaders will be used to mine the raw gravel. The slopes of the pit will be mined to 2H:1 V slopes. While mining in the center of the pits a much steeper highwall will be maintained. This highwall will be laid back as it approaches the mining limits. Some dozer pushing or ripping may also be used. The loader will directly load to a primary crusher or into trucks which will deliver the material to the crusher. 1.2.2 Waterways and Abutters Surface water exists in two forms in the permit area. The river runs in a westerly direction north of the permit area. A minimum buffer of 100 feet will be maintained between the river and the pit. This buffer will provide a sufficient safety factor against river capture. The second form of surface water will be storm and process water discharge. Substantial water will be discharged throughout the mine's life. Pumping will occur continuously for the life of the mine. Water will be pumped from dewatering trenches into the river. A discharge permit has been submitted for the two discharge points. Once all mining has been completed all pits will be allowed to fill. A gravel well permit and substitute water supply plan has been filed with this application. 1.2.3 Site Drainage Drainage will directed into the pit bottom. Water will then be pumped into the adjacent settling pond prior to discharge. Scott Pit Page 1-2 2.0 Potential Spill Sources and SPCC Features 2.1 SPCC Compliance [112.7(a)(1) and 112.7(a)(2) and 112.8 The only pe„uanent spill source onsite will be the fuel storage tank Portable aspahlt, cement, and crushing/screening plants will be brought onsite, but these will be covered by their own SPCC. 2.2 Tables [112.7(a)(3)(i and iii) and 112.7(b)] Fuel/Oil Dispensers Location Product/Size Estimated Spill Direction Secondary Containment Nearest Spill Kit Location Asphalt Plant Concrete Plant Wash Plant Dyed Diesel - 10,000 gal. Dyed Diesel - I0,000 gal. Dyed diesel - 1,000 gal. Crusher/Screener Dyed diesel - 250 gal. Crusher/Screener Dyed diesel - 250 gal. Crusher/Screener Dyed diesel - 500 gal. Crusher/Screener Dyed diesel - 500 gal. Crusher/Screener Dyed diesel - 600 gal. Mobile Equipment Name Equipment Class Secondary Containment Secondary Containment Secondary Containment Secondary Containment Secondary Containment Secondary Containment Secondary Containment Secondary Containment Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Secondary UV resistant lined sump Quantity Fuel Tank (gal) Hydraulic On -board System (gal) Spill Kit 962G Series II Wheel Loader: Medium 1 75.3 40 Office Office Office Office Office Office Office Office Note: This list is an estimate of on-site equipment. Equipment may vary. Equipment manufacturer may also vary. Tank sizes are based on Cat equipment. Spill Kits Description Containment Volume (gal) Location 30 -Gallon Overpack Absorbent 23 Office Trailer Emergency Spill Kit Scott Pit Page 2-1 3.0 Spill Prevention and Response 3.1 Discharge Prevention 3.1.1 SPCC Features and Operating Procedures [112. 7(a) (3) and 112.8] The operator's employees are trained to implement spill prevention practices for work with and around oil sources. Personnel shall use common sense and rely on spill prevention practices at all times to minimize the potential for a release of oil, For example, the following "common sense" practices are recommended: • keep container lids securely fastened at all times; • do not leave portable sources unattended; • return portable sources to their storage location after use; • use pads, drip pans, and funnels when transferring petroleum products from a portable container; • protect oil sources from damage by moving equipment; • do not store oil sources near catch basins or floor drains; and • loading and unloading of petroleum products shall be attended at all times. Suppliers All suppliers will meet the minimum requirements and regulations for tank truck unloading as established by the United States Department of Transportation. These supplier procedures also ensure that the vendor understands the site layout, knows the protocols for entering the site and unloading product, and has the necessary spill equipment on board to respond to a spill from the vehicle or fuel delivery hose. Observations of Deliveries The Facility Manager or designee will supervise deliveries for all new suppliers and will periodically observe deliveries for existing, approved suppliers. Delivery observations include: • vehicle inspection prior to delivery and departure (e.g., to make sure the driver does not drive away with the hose in the fill pipe); • inquiry to ensure the truck contains the right product for the tank; • assurance that the tank can hold what the supplier intends to deliver; and • adequate spill response equipment is on board the vehicle. Vehicle Filling Loading operations and vehicle fueling operations will be performed by facility personnel trained in the specific operation. The operators will: • check that the vehicle is properly secured before making connections, • inspect the storage and delivery system, hoses, connections and the receiving vessel before beginning operations, • monitor the transfer operation in-person from beginning to end, • check that the vehicle has been disconnected before departure, Scott Pit Page 4-1 .secure the storage and delivery system after use, and • Facility personnel will monitor the fueling area for safe and proper operation, and will take immediate action to correct any deficiencies. 3.1.2 Tests and Inspections [112.7(e) and 112.8 (c) (6)/ The personnel at the facility shall perform testing, inspection, and maintenance of all petroleum equipment to keep it performing in an efficient and environmentally sound manner. The tests and inspections shall be performed as discussed in the following subsections. 3.1.2.1 Inspecting AST's Facility personnel periodically observe the ASTs during operating hours. The ASTs shall be inspected monthly, and the results shall be recorded on the Monthly AST Inspection Report, as included in Appendix E. Spill response kits kept on site shall also be checked during the monthly AST inspection, and restocked as necessary. The monthly inspection reports shall be kept for at least three years in a file maintained by the Facility Manager. Inspections include observations of the exterior of the tank for signs of deterioration or spills (leaks), observations of the tank foundation and supports for signs of instability, and observations of the vent, fill and discharge pipes for signs of poor connection, that could cause a spill. In addition to these monthly inspections, the facility will periodically verify the integrity of each tank every ten years, or more often as deemed necessary by the inspection results. Integrity testing will be conducted in accordance with an industry standard procedure such as STI— SP001-03 or API 653. 3.1.2.1 Tank Maintenance All petroleum tank and piping problems shall be immediately reported to the Facility Manager. Visible oil spills (leaks) that cause a loss of oil from tank walls, piping or other components shall be repaired or replaced as soon as possible to prevent the potential for a major spill from the source. This is especially important for sources located outside or near drains or catch basins that discharge to the environment. 3.1.3 Training [112.7(fl] The operator shall provide SPCC spill training for personnel involved with handling petroleum products. The Facility Manager shall arrange for annual training, which shall include the following training topics: • an introduction to pollution control laws; • rules and regulations pertaining to the use and storage of petroleum products; • inspection, operation and maintenance of spill equipment, and petroleum storage and dispensing equipment; • spill response and cleanup; • spill notification and record keeping; and • spill prevention practices. Records of attendance at training and topics covered shall be maintained by the Facility Manager. Scott Pit Page 3-2 3.1.2.2 Documentation for Training The annual SPCC training shall be documented to include the instructor's name, course outline, date and duration of training, attendant's names and signatures, and corrective action list for areas in need of improvement, if any. This information shall be filed and maintained for at least 3 years at the office of the Environmental Compliance Officer. A Certificate of Training shall be presented to each employee that has completed the training. 3.1.4 Security [112.7(g)] No security issues are expected on this site. 3.2 Emergency Response [112.7(a)(3)(iv) and 112.7(c)1 This section describes the cleanup response and protocols to follow in the event of an oil spill. The uncontrolled discharge of oil to groundwater, surface water or soil is prohibited by State or Federal laws. It is imperative that action be taken to respond to a spill once it has occurred. In the event of an oil spill. Depending on the volume and characteristics of the material released, the operator has defined spill response as either a "Minor Spill Response" or "Major Spill Response" ("Spill Emergency"). A list of Emergency Contacts is included in Appendix A. 3.2.1 Minor Spill Response [112. 7(a)(3)(iv)] A "Minor Spill Response" is defined as one that poses no significant harm to human health or the environment. These spills involve generally less than 5 gallons and can usually be cleaned up by the operator's personnel. Other characteristics of a minor spill include the following: • the spilled material is easily stopped or controlled at the time of the spill; • the spill is localized; • the spilled material is not likely to reach surface water or groundwater; • there is little danger to human health; and • there is little danger of fire or explosion. In the event of a minor spill the following guidelines shall apply: I. Immediately notify the senior on-site person (i.e., Facility Manager). 2. Call the Colorado Department of Public Health and Environment, Colorado Division of Minerals and Geology, City of Rifle, and the County Environmental Health Department within two hours. Document the telephone calls on the Spill Notification Form in Appendix B. 3. Under the direction of a senior on-site person, contain the spill with spill response materials and equipment. 4. Place spill debris in properly labeled waste containers. 5. Complete the Spill Notification Form (Appendix B) and send to the Environmental Compliance Officer, 3.2.2 Major Spill Response (Spill Emergency) [112. 7(a)(3)(1v)] A "Spill Emergency" is defined as one involving a spill that cannot be safely controlled or cleaned up. Characteristics include the following: • the spill is large enough to spread beyond the immediate spill area; Scott Pit Page 3-3 ,.the spilled material enters surface water or groundwater (regardless of spill size); • the spill requires special training and equipment to cleanup; • the spilled material is dangerous to human health; and • there is a danger afire or explosion, In the event of a spill emergency the following guidelines shall apply: 1. All workers shall immediately evacuate the spill site and move to a safe distance away from the spill. 2. A senior on-site person shall call for medical assistance if workers are injured (no worker shall engage in rescue operations unless they have been properly trained and equipped). 3. A senior on-site person shall immediately Call the Colorado Department of Public Health and Environment, Colorado Division of Minerals and Geology, MSHA, City of Rifle, and the County Environmental Health Department within two hours. Document the telephone calls on the Spill Notification Form in Appendix B. 4. Notify the local Fire Department or Police Department, 5. A senior on-site person shall contact the Facility Manager and provide details regarding the spill. 6. The Facility Manager will coordinate cleanup and seek assistance from a cleanup contractor as necessary. lila senior on-site person is not available at the time of the spill, then the next highest employee in command shall assume responsibility. 3.2.3 Waste Disposal [112. 7(a)(3)(v)] Wastes resulting from a minor spill response will be containerized in impervious bags, drums or buckets. The waste will be removed from the site by a licensed waste hauler within two weeks. Wastes resulting from a major spill response will be removed and disposed of by a cleanup contractor. Contaminated soil/gravel will be processed by an approved asphalt plant or turned over until certified measurement shows total hyrdocarbons to be within acceptable limts. 3.2.4 Waste Disposal [112. 7(a) (4)] In the event of a minor spill, a senior on-site person shall notify the Facility Manager and complete a written Spill Notification Form. This form details the time, material, and quantity of oil released. If a major spill occurs at this facility the Facility Manager shall, in addition to the notification procedures above, provide written information to the EPA Regional Administrator as required by the SPCC Plan rules. 3.2.4.1 Spill Notification Forms After making the appropriate phone calls and the spill is contained, a Spill Notification Form, included in Appendix B, shall be completed and submitted to the Facility Manager. The Spill Notification Form includes a checklist to document the proper notification of state and federal agencies. The form shall be filed and maintained as long as operator owns and/or operates this facility. Scott Pit Page 3-4 4.0 Rea uired Improvements The Professional Engineer's certification of this plan is contingent on the following facility improvements being implemented for compliance with SPCC regulations 40 CFR 112: - Installtion of Bunker and Placement of Tank. No SPCC needed until Takn is placed. Scott Pit Page 4-1 Appendix A Emergency Contacts [1 12. 7 (a)(3 )(vi)] Emergency Contacts Spill Reporting Telephone # EPA (800) 424-8802 Colorado Dept. of Health and Environment (877) 518-5608 Colorado Division of Minerals and Geology (303) 866-3567 City of Rifle (970) 625-2122 Local Health Department MS HA (303) 231-5465 Local Emergency Agencies Telephone # Fire Department 911 Sheriff/Police 911 Spill Response Contractors Telephone # Greg Lewicki and Associates (303) 346-5196 Adequate Heavy Equipment Kept Onsite for Rapid Spill Response Owner/Operator Telephone # — United Companies (970) 243-4900 Appendix B Spill Notification Form This form must be submitted to Enviromental Officer. A copy must be retained on-site and included with the SPCC Plan. Spill Notification Form Part A: Basic Spill Data Spill Type: Major / Minor Spill Date: Type of Spilled Substance: Spill Time: Quantity Spilled: Spill Duration: Facility Name: Scott Pit Location of Spill: Owner / Company Name: United Companies Released to: [ ] Containment [ ] River [ ] Pond [] Soil [ ] Air [] Ground Water [ ] Other Nature of spill and any environmental or health effects: [ ] Injuries [ ] Fatalitie Part B: Notification Checklist Notification Date and Time Name of Person the Recieved Call Spill is any amount of petroleum product: Colorado Department of Public Health and Environment (877) 518-5608 Local Health Department City of Rifle (970) 625-2122 Colorado Division of Minerals and Geology (303) 866-3567 MSHA (303) 231-5465 Spill reaches ground water or surface water: EPA National Response Center (800) 424-8802 Form Completed By (Print Name): Sign and Date: This form must be submitted to Enviromental Officer. A copy must be retained on-site and included with the SPCC Plan. Appendix C Facility Plans [ 1 12.7(a)(3)] Please See DMG Permit Map C-2 Appendix D Substantial Harm Criteria Checklist [112.20(e)] Substantial Harm Criteria Checklist for Certification of Applicability [112.20 (e}] Facility Name: Scott Pit 1. Does the facility transfer oil over water to or from vessels and does the facility have a total oil storage capacity greater than or equal to 42,000 gallons? Yes No 2. Does the facility have a total oil storage capacity greater than or equal to 1 million gallons and does the facility lack secondary containment that is sufficiently large to contain the capacity of the largest above -ground oil storage tank plus sufficient freeboard to allow for precipitation within any above -ground oil storage tank area? Yes No 3. Does the facility have a total oil storage capacity greater than or equal to I million gallons and is the facility located at a distance such that a discharge from the facility could cause injury to fish and wildlife and sensitive environments? Yes No 4. Does the facility have a total oil storage capacity greater than or equal to 1 million gallons and is the facility located at a distance such that a discharge from the facility would shut down a public drinking water intake? Yes __ No 5. Does the facility have a total oil storage capacity greater than or equal to 1 million gallons and has the facility experienced a reportable oil spill in an amount greater than or equal to 10,000 gallons within the last 5 years? Yes No CERTIFICATION I certify under penalty of law that I have personally examined and am familiar with the information submitted in this document, and that based on my inquiry of those individuals responsible for obtaining this information, I believe that the submitted information is true, accurate, and complete. Appendix E AST Inspection Checklist Scott Pit AST Checklist w r Condition ofTank(Note any deformations, corrosion, staining, etc.) Condition of Secondary Containment (Note any cracks, drain valve, closed/locked, etc.) Foundation/tank Base (Note any staining, spills, water against base, etc.) Pumps and Piping Hose and Fittings Nearest Spill Kit (Notes kit contains all components) CERTIFICATION I certify under penalty of law that I have personally examined the above listed items. I believe that the submitted information is true, accurate, and complete. Name (please, type or print) Signature Title Date Appendix F Employee Training Log Employee Training Log Note: New employees shall receive initial training in the contents and implementation of this SPCC plan upon start of their employment. All employees shall receive annual refresher training in the contents and implementation of this SPCC plan. Date of Training Name of Employee Attending Topics Covered Instructor(s) Spill Response Procedures A minor spill occurs when: • The spill is generally less than 5 gallons. • The spill is localized or contained in one area. • The spill is not likely to reach ground or surface water. • There is little danger to human health. *There is little danger of fire or explosion. A major spill occurs when:. • The spill cannot be contained in a small area. • The spilled material enters surface water or ground water. • The spill requires special training and equipment to cleanup. • The spill is dangerous to human life. • There is danger of fire or explosion. • A minor spill should be hand led` `as follows: 1 .Immediately notify the senior on-site person. 2.Cal1(within 2 hours of the spill) • Colorado Department of Public Health and Environment (877) 518-5608 • Colorado Division of Minerals and Geology (303) 866-3567 • Local Health Department 3 .Under direction ofa senior on-site person, contain the spill the materials from the spill response kit. 4.Place spill debris in a properly labeled waste container. 5.Complete the Spill Notification Form in the onsite SPCC Plan and send to the Facility A maior snail'should be handled as follows: 1 .All workers shall immediately evacuate the spill site and move to a safe distance away from the spill. 2.A senior on-site person shall call for medical assistance if workers are 3 .Call (within 2 hours of the spill) • Colorado Department of Public Health and Environment (877) 518- • Colorado Division of Minerals and Geology (303) 866- • Local Health • MSHA (303) 231- • EPA (800) 424- • Local Fire or Sheriff Department • Facility Manager (970) 785-2339 4.The Facility Manager will coordinate cleanup and seek assistance from a cleanup contractor as necessary. 5.Complete the Spill Notification Form in the onsite SPCC Plan and send to the Facility ivi atiP er Appendix G Spill Prevention from Pit Flooding SCOTT PIT SPILL PREVENTION FROM PIT FLOODING To prevent contamination of surface water with petroleum products in the event of flooding the active mining area, the rivers surface elevation will be monitored through staff gages that are placed at pre -determined locations (the low points where water would enter the two mining pits). Monitoring will commence when the elevation of the river gets to within 2.5 feet of the elevation that would flood the mining area. When the river elevation reaches 1.5 feet below the elevation that would flood the mining area, all the equipment will be removed from the pit and taken to higher ground. The continuous monitoring level and evacuation level for each pit are detailed in the table below. Monitoring will be achieved using staff gages near each pit. These gages are shown on Map C-2. Mining Area Elevation of Mining Area Flooding Evacuation Level Monitoring Level 5308.0 5306.5 5305.5 2 5310.0 5308.5 5307.5 The locations of the staff gages are shown on Map C-2 of the Mine Plan as well as the SPCC Flood Monitoring Map on the following page. Site personnel will be trained in the procedures for monitoring the gages. The Monitoring Level on the gages will be marked in a dashed red line. The Evacuation Level will be marked in a solid red line. Text for both levels will also be written next to the respective lines. UNITED COMPANIES SCOTT PIT STORMWATER MANAGEMENT PLAN In Conformance with the Guidelines set by: Colorado Department of Public Health and Environment Water Quality Control Division Prepared for: Oldcastle SW Group, Inc. dba United Companies 2273 River Rd. Grand Junction, Colorado 81502 (970) 243 - 4900 Date: Prepared December 2008 Stormwater Management Plan ,Scott Pit December 2008 Facility Name: Facility Type: STORMWATER MANAGEMENT PLAN (SWMP) Scott Pit Sand and Gravel Processing, Asphalt and Concrete Production Date Initial Operations Started: Not Started Facility Mailing Address: Oldcastle SW Group, Inc. dba United Companies 2273 River Rd. Grand Junction, Colorado 81502 (970) 243 - 4900 Facility Location Address: Scott Pit 00001 County Road 315 Rifle, CO 81650 Management Approval Statement: This SWMP plan is fully supported by the management of Oldcastle SW Group, Inc. dba United Companies (United Companies). United Companies will implement this plan and amend it as needed due to expansion, modifications and improvements at the facility. I certify under penalty of law that a completed Stormwater Management Plan, in compliance with Part I.C. of the permit, has been prepared and implemented for my facility. Based upon my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete, and implemented as written. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations. Pete Siegmund, Vise President Certifying Engineer's Statement: This plan was prepared using sound engineering practices. I have examined the facility and this plan and find this plan conforms to the federal and state guidelines. Name: Greg Lewicki, PE Company: Greg Lewicki and Associates State Registration No.: Colorado 420335 Signature: Date: SEAL Stormwater Management Plan Scott Pit December 2008 INTRODUCTION This Stormwater Management Plan is prepared to mitigate potential impacts to Waters of the U.S. (Colorado River) resulting from operations at the Scott Pit by United Companies in Garfield County, Colorado. Water quality, drainage, monitoring and pollution control are addressed in this report. Adherence to this plan will allow United Companies to contain potential pollutants on the site and have a plan of action for minimizing the risk of contaminating surface waters. KEY ELEMENTS OF THIS PLAN • Process Water (water used for gravel washing, dust control, and groundwater.) shall be contained within the pit and routed to a sump before being discharged off site. The process water will be filtered using a gravel berm prior to entering the sump. • All disturbed areas will drain to Mining Area 1 or Mining Area 2, with the exception of a small portion of the access road to Mining Area 1. • Stormwater from rainfall or snowmelt will inadvertently mix with process water or become process water if it flows across the active mining area and shall be contained within the pit and routed to a sump before being discharged off site. The process water will be filtered using a gravel berm prior to entering the sump. • Any discharge of Process Water to surface waters or to groundwater will be regulated through the National Pollutant Discharge Elimination System (NPDES) and requires a permit. United Companies will obtain a Discharge Permit to allow discharge of Process Water from the pit. • Any discharge of Process Water from the site shall be sampled and tested for pH, Total Dissolved Solids, and Total Suspended Solids. The person sampling the discharge shall evaluate the flow rate and look for the presence of any oils (oily sheen). • The only acceptable methods of managing on-site stormwater runoff are to contain it for Use in Operations, for Infiltration into the ground, for Evaporation into the air, or Discharge to the River after filtration. • Sediment is classified by the State as a potential pollutant, which can negatively affect the quality of stormwater discharges. Loose sediment from mining, removal of topsoil, gravel washing, etc. will be contained on-site completely and not be allowed to be carried off-site by stormwater. Erosion control methods such as revegetation or paving will be implemented on the site to control sediment migration during stormwater runoff events. • The best method of managing site runoff water quality is to remove and properly dispose of any site contaminants that could be transported by stormwater runoff. All activities that could produce pollutants will be restricted to specific areas. The designated area is the facility area in the southeast corner of the permit area. Equipment and vehicle maintenance shall be performed over hard -packed gravel or paved areas graded to drain to a collection sump separate from the discharge sump. Drips, leaks and spills will be cleaned up regularly. Equipment washing will be restricted to one self-contained site designated for such uses, located in the facilities area. Stormwater Management Plan Scott Pit December 2008 • All fuel tanks and petroleum product storage will be regulated under the SPCC plan for the site. I. INDUSTRIAL ACTIVITY DESCRIPTION A. GENERAL PROJECT NAME AND LOCATION Scott Pit 00001 County Road 315 Rifle, CO 81650 The Scott Pit is a sand and gravel operation located just east of the rifle interchange of Interstate 70. approximately 1.5 miles southeast of the Town of Rifle, in Garfield County, Colorado, as shown in Figure 1- General Location Map. The site is bordered by the Colorado River to the north private land to the east and west, and 1-70 to the south. The property is located in Section 15, Township 6 south, Range 93 West, 6tn P.M Stormwater Management Plan Scott Pit December 2008 j Figure 1 - General Location Map Stormwater Management Plan Scott Pit December 2008 OWNER NAME AND ADDRESS Colorado Rivers Edge, LLC PO Box 1556 Rifle, Co 81650 (970) 625-5644 Local Contact: Justin Aubert, Environmental Manager SITE DESCRIPTION The Scott Pit is a sand and gravel operation located just east of the rifle interchange of Interstate 70. approximately 1.5 miles southeast of the Town of Rifle, in Garfield County, Colorado, as shown in Figure 1 General Location Map. The site is bordered by the Colorado River to the north Private land to the east and west, and I-70 to the south. Several ranch buildings are located within the permit area and will be removed during mining. The site has historically been utilized for growing hay and cattle grazing. Topography of the site is relatively flat. Surface water drainage for the site is toward the oxbow or the Colorado River. The Scott Pit will mine an alluvial gravel deposit approximately 25 feet thick over an area of approximately 21 acres. Crushing, screening and some stockpiles will be within the confines of the pit. The facilities area will be located outside of the pit above the 100 year flood plain. Topsoil stockpiles may be located outside of the pit, but will still be within the permit area. The total pennitted area is 116.9 acres. Stormwater Management Plan Scott Pit December 2008 B. STANDARD INDUSTRIAL CLASSIFICATION (SIC) CODES SIC CODE INDUSTRY DESCRIPTION 1442 Processing of Sand & Gravel 2951 Asphalt Batch Plants 3273 Ready -Mix Concrete Facilities C. DESCRIPTION OF OPERATIONS United Companies will conduct gravel mining operations under a Mined Land Reclamation Board Permit on the site known as the "Scott Pit." United Companies will be permitted for the following uses on the property: • Dewatering of the pit; • Mining, crushing, screening/washing, and stockpiling of aggregate; • Asphalt batching; • Concrete batching; • Storage and maintenance of heavy equipment. Facilities include a concrete batch plant, asphalt batch plant, crushing/screening, equipment storage, and fuel storage. The site is used for concrete batching operations, asphalt batching operations, and fuel storage. Brief descriptions of these operations are provided below: DEWATERING OF THE PIT Due to the shallow ground water conditions at the site, the pit will need to be dewatered once mining reaches the ground water table. Dewatering of the pit will be achieved by excavating shallow trenches around the perimeter of the pit and routing the water to a sump. The sump will have a berm surrounding it to detain fines. Water from the sump will then be pumped to the oxbow at the locations shown on the General Location Map. A dewatering detail is included in Appendix B. An NPDES permit has been applied for to allow this discharge. SAND AND GRAVEL PROCESSING Sand and gravel processing will consist of crushing, screeninglwashing and stockpiling of mined gravel. Material from stockpiles will be loaded onto trucks and shipped off site. CONCRETE BATCHING OPERATIONS Coarse and fine aggregate from the stockpiles and cement from the storage silo are mixed with water in a batching facility and loaded into mixer trucks. ASPHALT BATCHING OPERATIONS Aggregate from the stockpiles is heated and mixed with an asphalt -cement oil. Liquid fuel is burned to generate the heat required for asphalt mixing. Diesel fuel and hot asphalt oil are stored in above -ground tanks to operate the asphalt plant. FUEL STORAGE Fuel is located on site to serve construction and mining equipment, generators and other miscellaneous equipment. Storage of some diesel and gasoline is necessary to support operations. All storage tanks are above ground and are surrounded by isolation berms or have double walls to contain spills if they occur. Starmwater Management Plan Scott Pit December 2008 Spills and drips outside of the isolation berms will be removed when identified on daily inspections. Any fuel storage areas will be located outside the 100 year floodplain. A separate SPCC Plan will be prepared for this site. D. BASIN DESCRIPTIONS FOR AREAS OF INDUSTRIAL ACTIVITY OFFSITE SOURCES Off-site water from the area up gradient of the pit will be allowed to cross the permit boundary through undisturbed land. All disturbed land slopes to the pit bottom where sediment will settle out or be filtered out with a gravel berm. The only off-site water from down gradient of the pit that might be able to enter the pit and mix with on- site water is flood water from the Colorado River since the pit lies within the flood plain of the Colorado River. In the event flood water does enter the pit, the pumps will be shut off and the pit itself will act as a settling pond. Once the stormwater returns to acceptable sediment levels, the pumps may be turned back on to begin dewatering the pit. To prevent contamination of surface water with petroleum products in the event of flooding the active mining area, the rivers surface elevation will be monitored through staff gages that are placed at pre- determined locations (the low points where water would enter the two mining pits). During high flows, Gauge #1 is used to monitor Mining Area #1 and Gauge 42 is used to monitor Mining Area #2. Monitoring will commence when the elevation of the river gets to within 2.5 feet of the elevation that would flood the mining area. When the river elevation reaches 1.5 feet below the elevation that would flood the mining area, all the equipment will be removed from the pit and taken to higher ground. The continuous monitoring level and evacuation level for each pit are detailed in the table below. Monitoring will be achieved using staff gages near each pit. Mining Area Elevation of Mining Area Flooding Evacuation Level Monitoring Level 1 5308.0 5306.5 5305.5 2 5310.0 5308.5 5307.5 Site personnel will be trained in the procedures for monitoring the gages. The Monitoring Level on the gages will be marked in a dashed red line. The Evacuation Level will be marked in a solid red line. Text for both levels will also be written next to the respective lines. ON-SITE STORMWATER RUNOFF The disturbed areas of the site will be sloped to isolate the site from the surrounding area. Therefore, all run-off from disturbed areas will drain to the pits during the mining operation. The active pit will have a pit pump that pumps clean water to the river area. A combined stormwater/process water discharge permit will be obtained for the discharge from the pit pumps. The stormwater volume was determined using the calculations below as described in the "Procedures for Determining Peak Flows in Colorado", which includes and supplements Technical Release No. 55 "Urban Hydrology for Small Watersheds." Prior to discharge, sediment will be controlled by keeping the pit pump lower than the working area and using gravel filter check dams around the pump. In the areas that have not been disturbed, the stormwater will continue to flow because it is not expected to have significant suspended solids. Stormwater Management Plan Scott Pit December 2008 Mining Area #1 Stormwater Calculations The area of 13.7 acres shown below includes some area outside the pit that will drain to it. Runoff Curve Numbers(CN) for Watershed Area Description Hydrologic Soil Group Area (acres) CN Mined land disturbed Group C Soils 6.6 87 Pasture or Rangeland: Good (50-75% ground Group C Soils 7.1 74 cover; not heavily grazed) Total Area and Average CN 13.7 81 Hydrologic Soil Group Group A Soils: High infiltration (low runoff). Sand, loamy sand, or sandy loam. Infiltration rate > 0.3 inch/hr when wet. Group B Soils: Moderate infiltration (moderate runoff). Silt loam or loam. Infiltration rate 0.15 to 0.3 inch/hr when wet. Group C Soils: Low infiltration (moderate to high runoff). Sandy clay loam. Infiltration rate 0.05 to 0.15 inch/hr when wet. Group D Soils: Very low infiltration (high runoff). Clay loam, silty clay loam, sandy clay, silty clay, or clay. Infiltration rate 0 to 0.05 inch/hr when wet. The storage volume is calculated as the extraction area above the water table. The water table lies approximately 4 feet below the surrounding surface. This allows for a more than sufficient storage volume for all mining areas. Stormwater/Sediment Pond Design Design Event 100 -yr 24 -hr Event Design Precipitation (inches) 2.60 Watershed Area (acre) 13.7 Watershed Average CN 81 Calculated Runoff Volume (acre -ft) 1.411 Actual Runoff (acre -ft) 1.411 Even at the start of the excavation, the pit will be large enough to contain this volume. Stormwater Management Plan Scott Pit December 2008 Mining Area #2 Stormwater Calculations The area of 49.5 acres is the maximum that could drain to the pit, assuming no berms, ditches or stockpiles. Runoff Curve Numbers(CN) for Watershed Area Description Hydrologic Soil Group Area (acres) CN Mined land disturbed Group C Soils 13.9 87 Pasture or Rangeland: Good (50-75% ground Group C Soils 35.6 74 cover; not heavily grazed) Total Area and Average CN 49.5 78 Hydrologic Soil Group Group A Soils: High infiltration (low runoff). Sand, loamy sand, or sandy loam. Infiltration rate > 0.3 inch/hr when wet. Group B Soils: Moderate infiltration (moderate runoff). Silt loam or loam. Infiltration rate 0.15 to 0.3 inch/hr when wet. Group C Soils: Low infiltration (moderate to high runoff). Sandy clay loam. Infiltration rate 0.05 to 0.15 inch/hr when wet. Group D Soils: Very low infiltration (high runoff). Clay loam, silty clay loam, sandy clay, silty clay, or clay. Infiltration rate 0 to 0.05 inch/hr when wet. The storage volume is calculated as the extraction area above the water table. The water table lies approximately 4 feet below the surrounding surface. This allows for a more than sufficient storage volume for all mining areas. Stormwater/Sediment Pond Design Design Event 100 -yr 24 -hr Event Design Precipitation (inches) 2.60 Watershed Area (acre) 49.5 Watershed Average CN 78 Calculated Runoff Volume (acre -ft) 3.4481 Actual Runoff (acre -ft) 3.4481 Even at the start of the excavation, the pit will be large enough to contain this volume. Stormwater Management Plan Scott Pit December 2008 PROCESS WATER Process water consists of water used for washing gravel and dust suppression and stormwater that enters the pit. All process water will be contained within the pit, diverted to pit pump through the gravel berm, discharged into an existing oxbow of the Colorado River or to adjacent lowland areas that drain to the Colorado River. E. SUMMARY OF EXISTING DISCHARGE SAMPLING DATA No discharges have occurred at the Scott Pit. F. DESCRIPTION OF PROPOSED SAMPLING POINTS The Scott Pit will have a discharge point for each mining area to allow for discharge of water from dewatering operations and process water discharge. These points are shown on the General Location Map. This discharge point is being permitted with the Colorado Department of Public Health and Environment's (CDPHE) sand and gravel construction discharge permit. Parameters to be sampled are listed below in the following table. II. A. Effluent Parameter Measurement Frequency Sample Type Flow, MGD Oil and Grease, mWl pH, s.u. Total Suspended Solids, mg/I Total Dissolved Solids, mg/1 Weekly Weekly Monthly Monthly Weekly Instantaneous Visual In-situ Grab Grab STORMWATER MANAGEMENT CONTROLS SWMP ADMINISTRATOR The safety coordination team is responsible for the daily Stormwater Management Plan (SWMP) administration. B. RISK IDENTIFICATION AND ASSESSMENT It is anticipated that no stormwater discharges will occur for any stormwater events prior to be filtered through the gravel berm. A summary of estimated risks if a discharge were to occur is presented below: Stormwater Management Plan Scott Pit December 2008 Potential for Discharge from Basin: Pollutant A B Oil and Grease Low Low Total Dissolved Solids Low Low Total Suspended Solids Low Low pH (Outside Range 6.5 to 9.0) Low Low C. PREVENTITIVE MAINTENANCE These are the inspection and maintenance practices that will be implemented to control stormwater runoff quality: • All control measures will be inspected at least twice annually and following any storm event of 0.5 inches or greater. • All measures will be maintained in good working order, and if a repair or cleaning is necessary, it will be initiated within 7 days of reporting. • The Safety Coordinator will be responsible for inspections, maintenance and oversight of repair operations. • Ground slopes will be minimized to limit erosion and slow down flow during a stormwater event. • The site shall be uniformly graded to maintain sheet flow conditions during a stormwater event. • Disturbed areas and stockpiles will be reseeded when practical to minimize erosion and sediment transport. D. GOOD HOUSEKEEPING The following good housekeeping practices will be employed at the site: • Substances stored on-site will be stored in a neat, orderly manner in their appropriate containers. • Open containers of non -hazardous materials shall be stored under a roof or other enclosure to prevent mixing with stormwater. • The Safety Coordinator is responsible for day-to-day site operations and directing spill prevention, cleanup, and reporting. • Waste oil will be stored within a designated above ground storage tank or in covered areas to prevent mixing of stormwater and oil. United will encourage proper waste disposal practices. Starmwater Management Plan Scott Pit December 2008 • If drip pans are used, they will be cleaned on a regular basis and not allowed to till with stormwater, and the contents disposed in a landfill approved to handle such waste. • Oil -water separators will be cleaned of accumulated oil on a regular basis to prevent an overflow of oil out of the tank. The oil will be collected and hauled off-site by a contractor approved to handle such waste. • Hazardous materials will be stored in accordance with the Uniform Fire Code, and placards will be visible to identify the potential hazards. The classification of any material stored on-site shall be made by the fire department. E. BEST MANAGEMENT PRACTICES This Stormwater Management Plan was developed to improve the water quality of stormwater runoff. The Best Management Practices (BMP's) are intended to provide erosion control measures to avoid high sediment load transport into receiving streams. The BMPs are also intended to avoid transport of on-site contaminants into waterways. Implementation of the BMPs will improve water quality in discharges from construction sites. At this time, infiltration of stormwater into the soil is not regulated under this SWMP program. Water quality of groundwater is not being tested under this program since percolation through the soil generally reduces the transport of oils and suspended sediment. However, hydrocarbons can be transported through groundwater and can impact receiving streams and aquifers. Therefore, it is important to reduce the introduction of contaminants into the groundwater, and although testing of groundwater is not required under this program, 13MPs should be implemented to minimize the ability of stormwater to transport petroleum products and other pollutants into the groundwater system. Also, a separate SPCC plan has been developed for this site. STORMWATER MANAGEMENT • Off site stormwater will be allowed to pass over undisturbed areas to the River. • Stormwater encountered within the disturbed areas will be drained to the active pit. • The pump will be installed below the active pit floor to help prevent sediment contact with groundwater. • Trenches around the perimeter of the pit to help prevent sediment contact with groundwater. • Berms around the pump to filter the sediment out of the water that is being discharged. OTHER POLLUTION PREVENTION MEASURES • Roads are covered with aggregate road base. • Unused topsoil stockpiles in place over 60 days are seeded and mulched. • Vehicle tracking of mud and dirt onto paved surfaces should result in cleaning of paved surfaces at the end of each day. • An aggregate rock base course pad is maintained at points of ingress and egress. This will reduce mud and dirt from being transported outside of the perimeter bermed area. • Vehicle maintenance will be conducted in the facilities area that drains to a sump that is not discharged. • Petroleum products are stored in double walled tanks in the facility area, except the crusher tank which is located within the pit. Stormwater Management Plan Scott Pit December 2008 F. EMPLOYEE TRAINING United Companies, through the Safety Coordinator, will train and educate current and new employees on appropriate stormwater management, spill response, good housekeeping and materials storage practices. Best management practice training programs should also be conducted regarding improving the water quality of stormwater runoff. G. TESTING FOR NON-STORMWATER DISCHARGES The only non-stormwater discharges expected at this site is pit dewatering. Therefore, no testing for illicit connections or other non-stormwater discharges is proposed. H. AMENDMENTS This SWMP plan must be amended whenever there is a change in facility design, construction, operation, or maintenance that materially affects United Companies potential for discharge of pollutants (sediment, oils, etc.) into or upon waters of the United States. Such amendments must be implemented not later than six months after the change occurs. At least once every three years, United Companies will complete a review and evaluation of their SWMP Plan. Any amendments to the SWMP plan will be certified by a Registered Professional Engineer. III. COMPREHENSIVE INSPECTION The SWMP Administrator will conduct regular inspections of the site for stormwater management controls, spill control, maintenance, and cleanup. Records of inspections shall be maintained in files at the site. IV. RECORD KEEPING AND INTERNAL REPORTING PROCEDURE Incidents such as spills or other discharges, together with other relevant information describing the quality/quantity of stormwater will be included in records maintained at the site. Inspection records and maintenance records will be maintained at the site. At least two comprehensive Stormwater Management Plan inspections (Spring and Fall) will be conducted each year for annual reporting to the Colorado Department of Public Health and Environment. The reports shall include the date of the inspection, findings and actions taken, and submitted with the report due February 15 each year. V. CONSISTENCY WITH OTHER PLANS A separate SPCC Plan will be prepared for this site in accordance with Section 311 of the Clean Water Act. A NPDES permit has been submitted to CDPHE. If other permits affecting stormwater are required of the site in the future, the SWMP will be modified to ensure consistency. Stormwater Management Plan Scott Pit December 2008 VI. ALLOWABLE NON-STORMWATER DISCHARGES There is one non-stormwater discharge point for this proposed operation. That discharge if for dewatering of the pit and will be covered under a Discharge Permit. Stormwater Management Plan Scott Pit December• 2008 APPENDIX A Stormwaler Management Plan Scott Pit December 2008 STORMWATER DISCHARGE NPDES SAMPLING REQUIREMENTS The Scott Pit will have a discharge point for each mining area to allow for discharge of water from dewatering operations, stormwater and process water discharge. These points are shown on the General Location Map. This discharge point will be permitted with the Colorado Department of Public Health and Environment's (CDPHE) sand and gravel construction discharge permit. Parameters to be sampled are listed below in the following table. Effluent Parameter Measurement Sample Type Limits Frequency Flow, MGD Weekly Instantaneous Report Oil and Grease, mg/1 Weekly Visual 10 mg/1 daily max.* pH, s.u. Monthly In-situ 6.5 min. — 9.0 max. Total Suspended Solids (TSS), Monthly Grab 30 mg/1, 30 -day average mgll 45 mg/1, 7 -day average Total Dissolved Solids (TDS), Weekly Grab Report mg/ 1 *There shall be no visible sheen Stormwater Management Plan Scott Pit December 2008 APPENDIX B Stormwater Management Plan Scott Pit December 2008 DEWATERING DETAILS Working Surface Dewatering trench 2 % grade 2' high gravel berms for filtration Dewatering trench _ vel bedi•;\ ,-- ,,,,,, , - -I- —... _/_7\ /_. // 1•88cts: Mae: 1211108 Scala: as shown Dewatering Details Seed pit United Companies TETRA TECH REPORT APPENDIX B Flood flow hydrographs are reviewed to estimate the time period required to fill the proposed pits and to estimate the head differential when flows begin overtopping the banks. This is accomplished by utilizing the three selected storm events to develop a relationship for the rate of increase in flow on the rising limb of the hydrograph. The average rise of all three events is estimated to be approximately 2,000 cubic feet per second (cfs) per day using the periods of record where the hydrographs are increasing steadily. Note that only the steadily rising sections of the hydrograph are utilized in this estimate to conservatively represent the most rapid rise. This rate of increase in flows is utilized to estimate the rate of change in flow depth in the river using the HECRAS model. These calculations indicate that 2000 cfs will change the flow depths approximately 1 foot while flows remain below the channel banks. Above the banks the rate of depth change is much lower and averages 0.3 feet per day. Based on this review it can be concluded that while the river flows are increasing during a major flood event, it is reasonable to expect an increase in river depths of approximately 1 foot per day until peak flows reach the top of channel banks. A similar analysis is also conducted for the receding limb of the flood hydrographs. Hydraulics at Proposed Pits The topography of the project site is reviewed to qualitatively identify the Iow points were overtopping from the River will initially enter the pits. The low areas around the banks of the pits are identified and compared to surface water elevations in the River for various flows to identify which points will overtop first and to estimate the overtopping rates. River elevations are calculated using the HECRAS model. The overtopping rate is estimated based on daily flow and rise rates calculated as noted above. The following assumptions are utilized for this analysis: 1. Seepage rates from the river to the pits is relatively small compared to overtopping rates and is therefore neglected 2. Starting water surface elevations in the pits are equal to the water elevation in the river at the downstream cross section as determined by HECRAS using 2000 cfs. This represents the long term flows present in the river prior to the beginning of flood flows (see hydrographs in Figure 1). Based on these assumptions and this review it appears that Pit 1 will be inundated through a Iow point in the bank at the downstream end of the pit. Pit 1 will fill and drain at this location. Pit 2 will fill and drain at the low point at the northern edge of the pit. Recommendations at Proposed Pits A rundown for Pit 1 is proposed to be constructed at the low point along the pit bank as shown on the project plans. This structure will serve to collect overtopping flows and funnel flows into the rundown. There will be a slight depression into the bank in the structure. The rundowns and weirs are sized to fill the pit within a 24 hour period. The rundown shall be 45 feet wide with 4 to 1 side slopes, and Tined with riprap. Riprap shall be in accordance with CDOT standards for a D50 of 36 inches and 3 feet in thickness along the top of the bank and 6 feet in thickness along the pit slope. Bedding below the riprap is also recommended and shall be 8 inches thick of 3 inch minus bedding per CDOT standard for Class A filter material. Details of the rundown are shown on the Project Drawings. P:TROJECTS - WATER RES OURCES1525 I -001-00 HECRAS Review for Scott Pit \overflow anaiysis\Memo post floodmPGS_new-pits pmb.doc Pit 2 will be inundated once the 10 -year flow has been exceeded and the average daily rise is 0.3 feet per day. With approximately 03 feet of head the flow through the low point will be approximately 21 cfs at a velocity of roughly 1.4ft/s. Therefore no structure is proposed here and grass lining may be used instead. P:IPROJECTS - WATER RESOURCES15251-001-00 HECRAS Review for Scott Pit\overflow analysislMemo post llood_PGS_new-pits pmb.doc FLOOD HYDROGRAPHS P:1PROJECTS - WATER RESOURCES15251-001-00 HECRAS Review for Scott Pit\overflow analysis\Memo post flood.doc 35000 30000 25000 Colorado River Flood Events at Gage 09085100 ▪ 20000 3 0 ▪ 15000 - 10000 5000 0 +1984 Event, Qp=31,500 cfs --s—Average Daily 1983 Event, Qp=27,900 cfs 1995 Event, Qp=23,800 cfs I 11E111111 111E111 1111 1111111, L1111/1111111111111u111111111111111 E, IIII1L11111EE1 11111.1111 11111111111111111111111111 1111.1111,111111111111111L11111111111111111114111111 1111111111 EII 1111LIIIII 111EE111-111111,1111 111111111111111111111111111f1113u111EEE1111I11111;,E1 111111111111111 cc c n `m ns ar Q 8_ Q a a g c c> m m —mi tip 2 2 2< S< 7 -? N N Dates sn cn o O 4 z z o a Lp N O1 N - N c0 N N V' N Events River. Flows cfs 1.11 -yr 1460 1.25 -yr 3000 - 5000 - 7000 2 -yr 9330 10 -yr 24000 50 -yr 38000 100 -yr 45000 500 -yr 65000 RATES OF CHANGE, FLOWS AND WATER SURFACE ELEVATIONS P:1PROJECTS - WATER RESOURCE515251-001-00 HECRAS Review for Scott Pitloverflow analysis Memo post llood.doc Estimate of Rate Changes Estimate average rates of rise and fall on the Colorado River Date 1983 Event, Daily Peak Calculated rate of increase 1983 1984 Event, Daily Peak Calculated rate of increase 1984 1995 Event, Daily Peak Calculated rate of increase 1995 1 -May 3110 3540 2440 2 -May 2990 3840 2610 3 -May 2920 4090 2660 4 -May 3110 4090 2530 5 -May 3300 4260 2420 6 -May 3570 4340 2630 7 -May 3600 4230 2710 8 -May 3570 4150 2720 9 -May 4050 4370 2660 10 -May 4950 5290 2540 11 -May 6020 7140 1850 2710 12 -May 5990 9690 2550 3340 13 -May 5650 11900 2210 3640 14 -May 5310 14500 2600 3460 15 -May 5030 18100 3600 3780 16 -May 4980 19900 4850 17 -May 4920 19700 5720 18 -May 4680 19500 5720 19 -May 4760 17700 5580 20 -May 4890 18300 5870 21 -May 4980 20300 2000 6110 22 -May 5350 22000 1700 6520 23 -May 5930 24300 2300 7380 24 -May 7010 1080 26800 2500 7130 25 -May 8550 1540 30200 3400 7000 26 -May 9710 1160 30200 6600 27 -May 11400 1690 28600 1600 6460 28 -May 13600 2200 26500 2100 6010 29 -May 14700 1100 24900 1600 5720 30 -May 16200 1500 24900 6090 31 -May 16200 25200 6280 1 -Jun 15100 25800 7030 2 -Jun 15000 25900 8320 1290 3 -Jun 14200 24500 1400 9560 1240 4 -Jun 14300 23000 1500 10800 1240 5 -Jun 14700 21600 1400 11900 1100 6 -Jun 13900 20000 1600 13500 1600 7 -Jun 13500 21800 13800 8 -Jun 13800 20100 13600 9 -Jun 14200 18300 13300 10 -Jun 14700 16400 12300 11 -Jun 15700 15800 11600 12 -Jun 17800 15800 12400 800 13 -Jun 17300 16200 14500 2100 14 -Jun 14800 17900 17000 2500 15 -Jun 13700 20000 19400 2400 16 -Jun 13900 21600 21200 1800 Estimate of Rate Changes Estimate average rates of rise and fall on the Colorado River Date 1983 Event, Daily Peak Calculated rate of increase 1983 1984 Event, Daily Peak Calculated rate of increase 1984 1995 Event, Daily Peak Calculated rate of increase 1995 17 -Jun 14500 21200 21800 600 18 -Jun 16600 2100 20300 22800 1000 19 -Jun 20400 3800 21200 19700 20 -Jun 22800 2400 21600 19400 21 -Jun 23900 1100 21600 19300 22 -Jun 24100 22200 19300 23 -Jun 23700 21800 18800 24 -Jun 24100 21500 17800 25 -Jun 26900 21500 17000 26 -Jun 26700 20900 16700 27 -Jun 25200 1500 21100 17000 28 -Jun 24700 500 20600 17400 29 -Jun 23200 1500 20300 17500 30 -Jun 22100 1100 20700 17000 1 -Jul 20800 1300 21400 17200 2 -Jul 19100 1700 21000 17600 3 -Jul 18900 21100 17000 4 -Jul 18200 20300 17200 5 -Jul 17400 18900 15700 6 -Jul 17000 17500 14700 7 -Jul 16800 16100 15100 8 -Jul 18100 15400 15900 9 -Jul 18600 15900 16900 10 -Jul 18700 17400 18100 11 -Jul 17800 17100 18800 12 -Jul 16900 15300 20300 13 -Jut 16400 13600 20700 14 -Jul 15300 1100 14400 20100 15 -Jut 13500 1800 14100 19000 1100 16 -Jul 12000 1500 12600 17700 1300 17 -Jul 11300 11900 16700 1000 18 -Jul 10500 10700 15700 1000 19 -Jul 10100 10200 14900 800 20 -Jul 9530 9560 15100 21 -Jul 10100 9140 14500 22 -Jul 10800 8930 14000 23 -Jut 11000 8380 13600 24 -Jut 11000 8850 12700 900 25 -Jul 10200 9060 12100 600 26 -Jul 9710 9220 11300 800 27 -Jul 9210 8910 10500 800 28 -Jut 9070 8400 9800 700 29 -Jul 8200 8300 9440 30 -Jul 7800 8330 9200 31 -Jul 7750 8280 9060 18 -Aug 4720 5030 4230 Estimate of Rate Changes Estimate average rates of rise and fall on the Colorado River Date 1983 Event, Daily Peak Calculated rate of increase 1983 1984 Event, Daily Peak Calculated rate of increase 1984 1995 Event, Daily Peak Calculated rate of increase 1995 rise 1788 2471 1473 fall 1333 1120 900 reported peak 27900 31500 23800 average 1911 cfslday use 2000 cfslday average 1118 cfslday use 1000 cfslday -- 1984 Event, Daily Peak Y Y Ca N � C1- >. 0 • 0 C d1 a) • 7 ELI LJ -1 to inc 6) 0) A— /1„, r a 0 o 0 Lf) 0 M M 0 0 1-0 0 0 0 N 0 r 0 a 0 0 0 0 LSI Rate of Rise of Water SurfaceElevations vs Rate of Rise in Flow Description Downstream of Mining Area 1, HECRAS section 1 Rise in water elevation per cfs HECRAS cross section 2 Rise in water elevation per cfs HECRAS cross section 3 HECRAS cross section 4 HECRAS cross section 5 Upstream of Mining Area 2 and 3, HECRAS section 6 Rise in water elevation per cfs Upstream of Mining Area 3, HECRAS section 7 Rise in water elevation per cfs m co co a; s co 0 Station2932 Station2932 Station 4144 Station 4144 Station 5247 Station 5366 Station 5641 Station 6141 Station 6141 Station 6777 Station 6777 cfs wsel wsel wsel wsel wsel wsel 1.0 1460 5300.72 5305.78 5308.99 5309.09 5309.29 5309.77 5310.3 3000 5302.32 0.0010 5306.93 0.0007 5310.26 5310.41 5310.63 5311.19 0.0009 5311.85 0.0010 5000 5303.71 0.0007 5307.99 0.0005 5311.35 5311.55 5311.82 5312.48 0.0006 5313.27 0.0007 7000 5304.82 0.0006 5308.94 0.0005 5312.19 5312.45 5312.75 5313.50 0.0005 5314.39 0.0006 9330 5305.78 0.0004 5309.74 0.0003 5313.04 5313.34 5313.68 5314.51 0.0004 5315.52 0.0005 24000 5309.71 0.0003 5312.83 0.0002 5314.42 5314.54 5314.85 5315.52 0.0001 5316.31 0.0001 average rate/day* 1.1875 0.9223 1.0318 1.1261 24000 5309.71 5312.83 5314.42 5314.54 5314.85 5315.52 5316.31 0.3 38000 5310.68 0.0001 5315.04 0.0002 5316.40 5316.52 5316.82 5317.48 0.0001 5317.92 0.0001 45000 5311.73 0.0001 5316.01 0.0001 5317.28 5317.39 5317.68 5318.34 0.0001 5318.78 0.0001 average rate/day* 0.2193 0.2964 0.2629 0.2379 * average rates are split above and below the 10 -year event, representing apporximately where flows overtop the bank flows in excessof 10 -year event will rise at a slower rate than those flows within the channel PIT 1 INUNDATION P;1PROJECTS - WATER RESOURCES 15251-001-60 HECRAS Review for Scon Pit \overflow analysisltderno post flood.doc PIT 1 INUNDATION Water surface elevations Station Station Q 29+32 low paint 36+80 cfs wsel elev wsel 1460 5300.72 5309.5 5302.31 2000 5301.23 5309.5 5303.4 3000 5302.32 5309.5 5304.12 5000 5303.71 5309.5 5305.64 7000 5304.82 5309.5 5306.8 9330 5305.78 5309.5 5307.76 12000 5306.73 5309.5 5308.76 16000 5307.98 5309.5 5309.99 24000 5309.71 5309.5 5311.07 38000 5310.68 5309.5 5311.18 45000 5311.73 5309.5 5312.28 5314 5312 5310 0 5308 T. 5306 5304 5302 5300 PIT 1 INUNDATION 1 1 1 1 L 1 L 1 3 _ 1 1 J z 1 3 L 1 J L ! 3 1 L 1 I I I , 1 1 1 1 1 d 1 3 I 1 3 3 I I 1 _1_ J _ .1 _ L _ _ _1_ J _ L _ L _ __ _ _ - L I_ _ _ 1 _ 1 _ L _ -4.04 J_ 1 _ L _ Sv - _==r moo '- _..,., J_1_L_1____1 ;�Y--I--.�...'r""�--1"' _1-L_!_J_.L i- II _ L _ _I - -' mo_ _1_1_1 I --_-1_L J1 L -J111__-J-1-L-1 .1_L_3__I_I 1- - L__ _-I_1_1...............1-L-I-__-I_L-1-1-_-+-L_I-...1- .731 1_'7 a_S-L---1_J -�--T-7 _ -l - T -r---7-r-�r-1-_-T-r-1-T`1 1 --1_ 1 1 1 L 1 �• 11_._I_L_11 - - L - - -1- J _ 1....... _ _. J - i - L -1- - - J - L - L -1- - - 1 - L - 1- _I - 7-1- 1 , 1- 7-r 1 1 1 1 777- -------- 1_1_„f ___ _1 k 1 r 1 1 1 I <.V ...,...L... --1-J_ 1_�__ J___ L_1___ J _ 1 ___1___ 1-L-1- 3 _3 I 7 -r---1-- r - r-1--: J _ 1_ 3_ 1_____L...1 0 10000 20000 30000 Flow, cis 40000 50000 low pt +29+32 -A- 36+80 pit inundation assume river flow at 2000 cfs prior to flood event, steady long term flow at 2000 cfs wsel in river and pond is 5302 pond fills from low point at just US of 29+32, elev 5310 at and above 5310 the entire pit is inundated, water levels match river as flows receed the pond is at elevation 5310 and drains at downstream notch to elevation 5309, at low point with 1' of head discharge over rundown is approx. 132cfs @ 2.6 ft/s therefore protection is proposed Q=CLH312 C 2.64 L 50 H 1 Q 132.0 ✓ 2.6 PIT 2 INUNDATION Water surface elevations * Station Station Station Station low pt pond Q 61+41 63+00 int 66+00 int 67+77 north wsel cfs wsel wsel wsel wsel 1460 5309.77 5309.90 5310.15 5310.30 5316.00 5310.3 2000 5310.27 5310.42 5310.71 5310.88 5316.00 5310.3 3000 5311.19 5311.36 5311.67 5311.85 5316.00 5310.3 5000 5312.48 5312.68 5313.05 5313.27 5316.00 5310.3 7000 5313.50 5313.72 5314.14 5314.39 5316.00 5310.3 9330 5314.51 5314.76 5315.24 5315.52 5316.00 5310.3 21400 5315.34 5315.55 5315.94 5316.17 5316.00 5310.3 24000 5315.52 5315.72 5316.09 5316.31 5316.00 5313.34 38000 5317.48 5317.59 5317.80 5317.92 5316.00 5317.48 45000 5318.34 5318.45 5318.66 5318.78 5316.00 5318.34 * water surface elevations are from the HECRAS analsysis previous submitted except for those stations noted with 'int' where water surface elevations are interpolated O w 5320.00 5319.00 5318.00 5317.00 5316.00 5315.00 5314.00 5313.00 5312.00 5311.00 5310.00 5309.00 PIT 2 INUNDATION 3 1-,-1--"I1 y 1 -r r 1 L 1 1 T 1 _ _ T L T r I_ _-- _ 7 1 1 1 r r .....5 J ._ - L 3 7-2 3 1 3 1 1 I - T L 1 1 1 7 1-� ...w''N3_J___ J_ I-7-2-----1-7---r---I-7-Y-----I-y-T-r- --1-7--r r 1 7 1 4- I_ 7 _ T _ r _ 1 1 1 _ _I_ 7 _ T _ - _ 1 1 _ _I_ - _ T _ r _ _ _1... -I - T _ - - r ---LT.. , _L_ __1_7_i_L___I_7_ 1_L___I-A-1C _ __I_3=17.7.7-1 1_1 7. 1_ _ 7_ I__ I J 1 1 17]- I- L- J S L 7 717 7 7 T' C= J 1' r 7.i 7 1 7 T - L--- I J 1 1 7= z- C 11 __ 3 .. _ 1 J 1 L 1 3 7 1 L L__- F - -1- ,, _ -1 _ } _ - -I- 7-1 - + _ - -1- 7 - f - - - _ -1- .. { _., t - r - - - I - -1 ♦ -- . - , 0 10000 20000 30000 Flow, cfs 40000 50000 - low pt -a-67+77 pond inundation assume river flow at 2000 cfs prior to flood event, steady long term flow at 2000 cfs wsel in river and pond is 5310.3 pond inundation is controlled by low point at north end of pond as flows exceed 5316 at station 67+77 the pond becomes inundated elevation 5316 at 67+77 is reached with approximatley 24000 cfs in the river at and above 24000 cfs river inundates entire floodplain and rises @ 0.3ftlday at the low point with 0.3' of head discharge into pond is approx. 21cfs @ 1.4ftls therefore no protection is proposed QTCLH3r2 C 2.64 L 50 H 0.3 Q 21.7 ✓ 1.4 MAPS APPENDIX C Wetland Shelf Design: For areas not adjacent to existing wetlands provided overburden and imported fill allows the backfilling Cottonwood Saplings Planted Or Existing Trees Avoided 3 Topsoil Replaced 15' Wetland Shelf 5' Wetland Fringe Original Pre -Mining Surface Approximate Lake Surface to Depth of 1.0' 3 .................. Stumps and Roots Placed in Piles on the Lake Bottom for Fish Habitat Wetland Fringe Design Cottonwood Saplings Or Existing Trees Avoided 3 Topsoil Replaced to Depth of 1.0' Original Pre -Mining Surface 11 3 5' Wetland Fringe Approximate Lake Surface Stumps and Roots Placed in Piles on the Lake Bottom for Fish Habitat Original Pre -Mining Surface Approximate Lake Surface Wetland Shelf Design: For areas adjacent to existing wetlands provided overburden and imported fill allows the backfilling Cottonwood Saplings Planted Or Existing Trees Avoided 15' Wetland Shelf Stumps and Roots Placed in Piles on the Lake Bottom for Fish Habitat 5' Wetland Fringe 5' Minimum Buffer Between Excavation and Existing Wetlands Topsoil Replaced to Depth of 1.0' Existing Wetlands Notes: I. These shelf wetlands will be installed to the extent that import fill is available and if it is decided that it will not adversely affect flight safety at the airport. Revisions By Date Drawn by: BM Checked by: GL Approved by: GL Date 1/30/09 Scale As shown Greg Lewicki And Associates, PLLC 11541 Warrington Court Parker, CO USA 80138 Phone (303)-348-5196 E -Mail -info@tewicki.biz Map F-2: Wetland Details Scott Expansion to the Chambers Pit United Companies 1 0 0 5 N l U1 U fN U U N S. 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The access shall be constructed, maintained and used in accordance with this permit, including the State Highway Access Code and any attachments, terms, conditions and exhibits. This permit may be revoked by the issuing authority if at any time the permitted access and its use violate any parts of this permit. The issuing authority, the Department and their duly appointed agents and employees shall be held harmless against arty action for personal injury or property damage sustained by reason of the exercise of the permit. Location: Located on the north side of 1-70 Frontage, a distance of 961 feet west of RP 92. This access is located at the very west end of the frontage road. Access to Provide Service to: Gravel Pit 335 Daily Trips 100.00 % Other terms and conditions: * See Attached Pages 2 and 3 and Other Enclosures for Additional Terms and Conditions. • MUNICIPALITY OR COUNTY APPROVAL Required only when the appropriate local authority retains issuing authority. By (x) Date Title Upon the signing of this permit the perm'ttee agrees to the terms and conditions and referenced attachments contained herein. All construction shall be completed in an expeditious and safe manner and shall be finished within 45 days from Initiation. The permitted access shall be completed in accordance with the terms and conditions of the permit prior to being used. The permittee shall notify Brian Killian with the Colorado Department of Transportation in Grand Junction at 970- 248-7293 at least 48 hours prior to commencing construction within the State Highway right-of-way. The person signing as the permittee must be the owner or legal representative of the property served by the permitted access and have full authority to accept the permit and its terms an nditions. Permittee - / Date (x) I.._ ,,,,_,,, / - ( ywrwrr� ! —(90 - 0,4 This permit is not valid until signed by a duly authorized representative of the Department. COLORADO DEPARTMENT OF TRANSPORTATION By (x) (2-..-a14 C �ta Dal�f issue? J h u rw ,2?, l ll ' Title 4 kkt / /fm» ' Copy Distribution, Required: 1.Region 2.Applican1 3.8taff Access Section Make cdpies as necessary for. Local Authority Inspector MTCE Patrol Traffic Engineer Previous editions are obsolfiiiie and may not be used COOT Form #101 3.198 r State Highway Access Permit Form 101. Page 2 The following paragraphs are excerpts of the State Highway Access Code. These are provided for your convenience but do not alleviate compliance with aft sections of the Access Code. A copy of the State Highway Access Code is available from your total issuing authority (loci government) orthe Colorado Department of Transportation (Department). When this permit was issued, the issuing authority made its decision based in part an information submitted by the applicant. on the access category which Is assigned to the highway, what alternative access to other public roads and streets Is available. and safely and design standards. Changes in use ar design not approved by the permit or the issuing authority may cause the revocation or suspension of the permit. APPEALS 1. Should the permittee a applicant object to the denial of a permit application by the Department or. object to any of the terns or conditions ofa permit placed there by the Department- the applicant and permittee (appellant) have a right to appeal the decision to the [Transportation] Commission (of Colorado]. To appeal a decision, submit a request for administrative hearing to the Transportation Commission of Colorado within 60 days of transmittal ofinance of denial or transmittal of the permit for signature. Submit the request to the Transportation Commission of Colorado, 4201 East Arkansas Avenue, Denver. Colorado 80222-3400. The request shall include reasons for the appeal and may include changes, revisions, or conditions that would be acceptable to the permittee or appliranL 2. Any appeal by the applicant or permittee of action by a local issuing authority shall be filed with the local authority and be consistent with the appeal procedures of the lora( authority. 3. In submitting the request for administrative hearing, the appellant has the Option or including within the appeal a request for a review by the Departments intemat administrative review committee pursuant to (Code] subsection 2.10. When such committee review Is requested, processing of the appeal tor formal administrative hearing, 2.9(5) and (6), shall be suspended until the appellant notifies the Commission to emceed with the administrative hearing, or the appellant submits a request to the Commission or the administrative law judge to withdraw the appeal. The two administrative processes, the internal administrative review committee, and the administrative hearing, may not run calrurrently. 4. Reganirees of any communications, meetings, administrative reviews or nego0alions with the Department or the Internal administrative review Committee regarding revisions or objections to the permit or a denial, if the permittee or applicant wishes to appeal the Department's decision to the Commission for a hearing, the appeal must be brought to the Commission within 60 days of transmittal of notice of denial or transmittal of the penal. PERMIT EXPIRATION 1. A permit strati be considered expired if the amass is not under construction within one year of the permit issue dale or before the expiration or any authorized extension. When the permittee is unable 10 commence construction within one year afler the permit issue date, the permilles may request a one year extension from the issuing authority, No more than two one-year extensions may be granted under any circumstances. tf the access Is not under construction wthi1 three years from date of Issue the permit will be considered expired. Any request for an extension must be In writing and submitted to the issuing authority before the permit expires. The request should state the reasons why the extension is necessary, when construction is anticipated, and include a copy of page 1 (face of permit) of the access permit. Extension approvals shall be in writing. The local issuing authority shall obtain the concurrence of the Department prior to the approval of an extension, and shalt notify the Department of all denied extensions within len days. Any person wishing to reestablish an access permit that has expired may begin again with the application procedures. An approved Notice to Proceed. aulonativatly renews the access permit for the period of the Notice to Proceed. CONSTRUCTION 1. Construction may not begin until a Notice to Proceed is approved. [Code subsection 2.4] 2. The construction of the access and its appurtenances as required by the terms and conditions of the permit shall he completed at the expense of the permittee except as provided in subsection 2.14. All materials used in the construction of the access within the highway right-of-way or on permanent easements, become public properly. Any materials removed from the highway right-of-way will be disposed of only as directed by the Department: Ail fencing. guard rail, traffic control devices and other equipment and materials removed in the course of access construction shall be given to the Department unless otherwise instructed by the permit or the Department inspector. 3. The permittee shall notify the individual or the office specified on the permit or Notice to Proceed at least two working days prior to any construction within state highway right-of-way. Construction of the access shall not proceed until both the access permit and the Notice to Proceed are issued. The access shall be completed in an expeditious and safe manner and shall be finished within 45 days from initiation of construction within the highway right-of-way. A construction lime extension not to exceed 30 working days may be requested from the individual of office specified on the permit. 4. The issuing authority and the Department may inspect the access during construction and upon completion of the access to ensure that all terms and conditions of the pent are met. inspectors are authorized to enforce the conditions of the permit during construction and to halt any activities within stale right-of-way that do not comply with the provisions of the permit, that oared with concurrent highway construction or maintenance work, that endanger highway property. natural of cultural resources protected by law. or the health and safety of workers or the public. 5. Prior to using the access, the permittee is required to complete the constriction according to the terms and conditions 01 the permit, Failure by the permittee to abide by all permit terms and conditions shall be sufficient cause for the Department or issuing authority to initiate action to suspend or revoke the permit and dose the access. If in the determinating of the Department or issuing authority the failure to comply with or comprele the construction requirements of the permit create a highway safety hazard. such shall be sufficient cause for the summary suspension of the permit. If the permittee wishes to use the access prior to completion, arrangements must he approved by the issuing authority and Department and included in the permit The Department or issuing authority may order a hall to any unauthorized use of the access pursuant to statutory and regulatory powers_ Reconstruction or improvement of the access may be required when the permittee has failed to meet required specifications of design ar materials. If any construction element fails within two years due to improper construction or material specifications. the permittee shall be responsible for alt repairs. Failure to make such repairs may result in suspension of the permit and closure of the access. 6. The permittee shall pmvtde construction traffic control devices at all limes during access construction. in conformance with the M.U.T.C.D. as required by section 42-4-104, C.R.S., as amended. 7. A utility permit shall be obtained for any utility work within highway right -0f -way. Where necessary to remove, relocate, or repair a traffio control device or public or private utllilies for the construction of a permitted access, the relocation, removal or repair shall be accomplished by the permittee without cost to the Department or issuing authority. and at the direction of the Department or utility company. Any damage to the state highway or other public right-of-way beyond that which is allowed in the permit shall be repaired immediately. The permittee is responsible for the repair of any utility damaged in the course of access construdlon, recanstructlon or repair. 0. In the event it becomes necessary to remove any right-of-way fence, the posts on either side of the access shall be securely braced with an approved end post before the fence is cut to prevent any stacking of the remaining fence. Ail posts and wire removed are Department property and shall be turned over 10 a representative of the Department 9. The permittee shall ensure that a copy of the permit is available for review at the construction site at all times. The permit may require the contractor to notify the individual or office specified on the permit at any specified phases in construction (o allow the fiekt inspector to inspect various aspects of construction such as concrete forms, subbase, base course compaction, and materials specifications_ Minor changes and additions may be ordered by the Department or local authority field inspector to meet unanticipated site conditions. 10. Each access shall be constructed In a manner that shall not cause water to enter onto the roadway or shoulder, and shall not interfere with the existing drainage system on the right-of-way or any adopted municipal system and drainage pian.. 11, By accepting the permit, permittee agrees to save, Indemnify. and hold tramhless to the extent allowed by law. the issuing authority, the Department, its officers. and employees from suits, actions, claims of any type or character brought because of Injuries or damage sustained by any person resulting from the permittees use of the amass permit. during the construction of the access. CHANGES IN ACCESS USE AND PERMIT VIOLATIONS 1. 11 Is the responsibility of the properly owner and permittee to ensure that the use of the access to the property is not in viotaton of the Code, permit terms and conditions or the Act. The leer and conditions of any permit are binding upon aft assigns, successors -in -interest, heirs and occupants. If any signiticaant changes are made Or will be made in the use of the property which will affect access operation, traffic volume and or vehicle type, the permittee or property owner shall contact the local issuing authority or the Department to determine if a new access permit and modifications to the access are required. 2. When an access is constructed or used In violation of the Code. section 43-2-147(5)(c), C.R.S., of the Acl applies. The Department or issuing authority may summarily suspend an access permit and immediately order closure of the access when ils continued use presents an immediate threat to public health, welfare or safety. Summary suspension shall comply with article 4 of title 24. C.R.S. MA€NTENANCE 1. The permltee, his or her heirs, successors -in -interest assigns, and occupants of the properly serviced by the access shall be responsible for meeting the terms and conditions of the permit, the repair and maintenance of the access beyond the edge of the roadway including any cattle guard and gate, and the removal or clearance of snow or ice upon the access even (hough deposited on the access in the course of Department snow removal operations. Within unincorporated areas the Department will keep access culverts clean as part of maintenance of the highway drainage system. However, the pernitee is responsible for the repair and replacement of any access -related culverts within the rightwf-way. Within incorporated areas, drainage responsibilities for municipalities are determined by statute and local ordinance. The Department will maintain the roadway including suxi1ary lanes and shoulders, except In those cases where the access Installation has failed due to tmpmper access construction andfa failure to follow permit requirements and specifications In which case the permittee shall be responsible for such repair. Any significant repairs such as culvert replacement. resurfacing, or changes in design or specifications, requires authorization from the Department. STATE HIGHWAY ACCESS PERMIT 305272 Located on I -70A Frontage near RP 91.818 Left Issued to Rivers Edge, LLC TERMS AND CONDITIONS January 4, 2005 This permit replaces any and all additional highway access permits that may be in existence for this location. 2. The Frontage Road shall be paved from the current frontage road edge of pavement to this access, approx. one third of a mite in length. The construction and design shall be in accordance with Section 4.7 of the Access Code, Department Specifications, and the Region Materials Engineer. 3. The Permittee shall provide a performance bond that will insure completion of the required highway and all related intersection improvements in conformance with all Department standards and specifications. The bond must be at least 110% of the estimated total highway construction cost and the bonding agency must be surety licensed to do business in the State of Colorado. A thorough Construction•Cost Estimate sealed by a Colorado Registered Professional Engineer and a draft of the bond must be provided and approved by Department before acceptance of the final bond and before construction is approved to commence. 4. The access shall be constructed with radii to accommodate the minimum turning radius of the largest vehicle or 50 -foot, whichever is greater. The turning radius shall be measured from the white line on the Hwy to the edge of the driveway. A drawing of the design vehicle turning template for the largest vehicle entering/exiting site will be required to ensure proper radius and lane widths. 5. The access shall be constructed perpendicular to the travel lanes of the State Highway for a minimum distance of 40 feet from the edge of roadway. Side slopes shall be at a 4:1 slope on the roadway and at 6:1 to the approach. The driveway shall slope away from the highway at a -2% grade for the first 20 feet of driveway. This design shall be in conformance with section 4 of the State Highway Access Code, 2CCR 601-1. 6. The access shall be surfaced in accordance with Section 4.7 of the Access Code immediately upon completion of earthwork construction and prior to use. This access shall be hard surfaced in accordance with Section 4.7 of the Access Code a minimum distance of 50 feet from the traveled way. Where the hard surface is to abut existing pavement, the existing pavement shall be saw cut and removed a minimum of one foot back from the existing edge for bituminous, or until an acceptable existing cross slope is achieved. Surfacing shall meet the Department's specifications with minimum surfacing to be equal to or greater than existing highway conditions. 7. This permitted access is only for the use and purpose stated in the Application and Permit. This Permit is issued in accordance with the State Highway Access Code (2 CCR 601-1), and is based in part upon the information submitted by the Permittee. Any subsequent relocation, reconstruction, or modifications to the access or changes in the traffic volume or traffic nature using the access shall be requested for by means of a new application. Any changes causing non-compliance with the Access Code may render this permit void, requiring a new permit. 8, The permittee Is required to comply with the Americans with Disabilities Act Accessibility Guidelines (ADAAG) that have been adopted by the U.S. Architectural and Transportation Barriers Compliance Board (Access Board), and incorporated by the U.S. Attorney General as a federal standard. These guidelines provide requirements for design and construction. The current Standards Plans and can be found on the Design and Construction Project Support web page at: http://www.dot.state.co.us/DesignSuoport/, then click on Design Bulletins. STATE HIGHWAY ACCESS PERMIT 305272 Located on I -70A Frontage near RP 91.818 Left Issued to Rivers Edge, LLC January 4, 2005 TERMS AND CONDITIONS (cont.) 9. A pre -design meeting is required prior to construction design. Required personnel for this meeting are: Engineer of Record, Design Engineer, and Permittee. Please contact Skip Hudson 970-248-7076 for scheduling this pre -design meeting. 10. A Notice to Proceed, CDOT Form 1265 is required before beginning the construction of the access or any activity within the highway right-of-way. To receive the Notice to Proceed the applicant shall submit a complete packet to CDOT with the following items: (a) A cover letter requesting a Notice to Proceed. (b) Certificate of Insurance Liability as per Section 2.3(11)(i) of the State Highway Access Code. (c) A certified Traffic Control Plan in accordance with Section 2.4(6) of the Access Code. The Traffic Control Plan shall provide accessibility features to accommodate all pedestrians including persons with disabilities for all pathways during construction. (d) Ten copies of Construction Plans Stamped (11 "x 17" with a minimum scale of 1" = 50') by a Colorado Registered Professional Engineer in full compliance with the State Highway Access Code. (e) Signed and sealed -Notice to Proceed Checklist. (f) Signed and Approved Performance Bond. (g) Prior to the issuance of any Notice to Proceed, the applicant shall schedule a pre - construction meeting including but not limited to applicant, Engineer of Record, Construction inspector, construction personnel, permittee (if other than applicant), CDOT representative and Traffic Control Supervisor. (h) A construction schedule will be required at the pre -construction meeting. 11. No drainage from this site shall enter onto the State Highway travel lanes. The Permittee is required to maintain all drainage in excess of historical flows and time of concentration on site. All existing drainage structures shall be extended, modified or upgraded, as applicable, to accommodate all new construction and safety standards, in accordance with the Department's standard specifications. 12. A 24 -inch minimum culvert with protective end treatments may be required for this access. The culvert shall be kept free of blockage to maintain proper flow and drainage. 13. Open cuts, which are at least 4 inches in depth, within 30 feet of the edge of the State Highway traveled way, will not be left open at night, on weekends, or on holidays, or shall be protected with a suitable barrier per State and Federal Standards. 14. The Permittee is responsible for obtaining any necessary additional Federal, State and/or City/County permits or clearances required for construction of the access. Approval of this access permit does not constitute verification of this action by the Permittee. Permittee is also responsible for obtaining all necessary utility permits in addition to this access permit. 15. All workers within the State Highway right of way shall comply with their employer's safety and health policies/procedures, and all applicable U.S. Occupational Safety and Health Administration (OSHA) regulations - Including, but not limited to the applicable sections of 29 CFR Part 1910 - Occupational Safety and Health Standards and 29 CFR Part 1926 - Safety and Health Regulations for Construction. Personal protective equipment (e.g. head protection, STATE HIGHWAY ACCESS PERMIT 305272 Located on 1-70A Frontage near RP 91.818 Left Issued to Rivers Edge, LLC January 4, 2005 TERMS AND CONDITIONS (cont.) footwear, high visibility apparel, safety glasses, hearing protection, respirators, gloves, etc.) shall be worn as appropriate for the work being performed, and as specified in regulation. 16. Nothing in this permit shall prohibit the chief engineer from exercising the right granted in CRS 43-3-102 Including but not limited to restricting left hand turns by construction of physical medial separations. 17. Access construction shall not negatively impact other properties or the State Highway ROW, 18. A signed and approved temporary lease agreement is required if construction trailers are to be located on CDOT ROW during construction. 19. The Permittee shall provide accessibility features to accommodate all pedestrians including persons with disabilities for all pathways during and after construction. 20. During access construction no construction personnel vehicles will be permitted to park in the state highway right-of-way. 21. The access shall be completed in an expeditious and safe manner and shall be completed within 45 days from initiation of construction within State Highway right-of-way or in accordance with written concurrence of the Access Manager. All construction shall be completed in a single season. 22. All costs associated with any type of utility work will be at the sole responsibility and cost of the permittee and at no cost to CDOT. 23. Any damage to present highway facilities including traffic control devices shall be repaired immediately at no cost to the Department and prior to continuing other work. 24. Any mud or other material tracked or otherwise deposited on the roadway shall be removed daily or as ordered by the Department inspector. If mud is obvious condition during site construction, it is recommended that the contractor build a Stabilized Construction Entrance or Scrubber Pad at the intended construction access to aid in the removal of mud and debris from vehicle tires. The details of the Stabilized Construction Entrance is found in the M & S Standards Plan No. M-208-1. 25. A fully executed complete copy of this permit and the Notice to Proceed must be on the job site with the contractor at all times during the construction. Failure to comply with this or any other construction requirement may result in the immediate suspension of work by order of the Department inspector or the issuing authority. 26. All construction and inspection work must be under the direction of a Colorado Registered Professional Engineer. The PE's responsibilities include, but are not limited to: (a) The PE shall evaluate compliance with plans and specifications with regard to the roadway improvements within the State right-of-way. The PE shall carefully monitor the contractor's compliance on all aspects of construction, including construction zone traffic control. (b) Engineering Certification: After inspection and before final acceptance, the Engineer shall certify to CDOT In writing that all inspections, materials, materials testing, and construction methods conform to the plans, specifications and purpose of design. Upon completion of the work, that responsible Engineer shall submit an "As Built" plans, showing in detail all approved construction changes, modification. STATE HIGHWAY ACCESS PERMIT 305272 Located on I -70A Frontage near RP 91.818 Left Issued to Rivers Edge, LLC January 4, 2005 TERMS AND CONDITIONS (cont.) 27. No work will be allowed at night, Saturdays, Sundays and legal holidays without prior authorization from the Department. The Department may also restrict work within the State Highway right-of-way during adverse weather conditions. 28. Areas of roadway and/or right-of-way disturbed during this installation shall be restored to their original conditions to insure proper strength and stability, drainage and erosion control. Restoration shall meet the Department's standard specifications for topsoil, fertilization, mulching, and re -seeding. Construction Completion & Final Acceptance 29. Upon the completion of the access and prior to any use as allowed by this permit, the permittee shall notify the Permit Manager by certified mail within 10 working days to request a final inspection. This request shall include signed and sealed certification that all materials and construction have been completed in accordance with all applicable Department Standards and Specifications; and that the access is constructed in conformance with the State Highway Access Code, 2 CCR 601-1, and the terms and conditions included in this permit. The engineer of record, shall be present for this inspection. The access serviced by this permit may not be opened to traffic until the CDOT Access Manager provides written initial approval. 30. Following the final inspection, CDOT will prepare an Access Construction Inspection Summary Letter and send it to the applicant, permittee, and engineer of record. If additional items are required to complete the access construction, a list of these items will be part of the access construction inspection summary letter. All required items and final as -built survey shall be completed within 30 days from receiving the Access Construction Summary Letter. The access serviced by this permit may not be opened to traffic until written approval has been given from the CDOT Access Manager. If all work appears to have been done in general close conformity with the above named permit, an initial acceptance letter will be sent to the permittee and this access may be opened for traffic. 31. The 2 year warrantee period will begin when the initial acceptance letter is issued. In accordance with section 2.5(6) of the State Highway Access Code, if any construction element fails within two -years due to improper construction or material specifications, the Permittee shall be responsible for all repairs. Failure to make such repairs may result in suspension of the permit and closure of the access. The letter of final acceptance will be issued once the access has been inspected and is found to comply with all material and construction in accordance with all applicable Department Standards and Specifications approx. 2 years after initial acceptance. T R AFF IC IMP ACT S TUD Y United Companies Scott Gravel Pit Garfield County, Colorado Prepared for United Companies 2273 River Road PO Box 3609 Grand Junction, CO 81502 Prepared by Kimley-Horn and Associates, Inc. 950 Seventeenth Street Suite 1050 Denver, Colorado 80202 (303) 228-2300 (303) 446-8678 FAX October 2005 This document, together with the concepts and designs presented herein, as an instrument of service, is intended only for the specific purpose and client for which it was prepared. Reuse of and improper reliance on this document without written authorization and adaptation by Kimley-Horn and Associates, Inc. shall be without liability to KimIey-Horn and Associates, Inc. TABLE OF CONTENTS TABLE OF CONTENTS APPENDICES LIST OF TABLES ii LIST OF FIGURES ii 1.0 EXECUTIVE SUMMARY 1 2.0 INTRODUCTION 2 3,0 EXISTING AND FUTURE CONDITIONS 3 3.1 Existing Roadway Network 3 3.2 Existing Traffic Volumes 3 3.3 Unspecified Development Traffic Growth 3 4.0 PROJECT TRAFFIC CHARACTERISTICS 8 4.1 Trip Generation 8 4.2 Trip Distribution and Traffic Assignment 8 4.3 Total Background Plus Project Traffic 8 5.0 TRAFFIC OPERATIONS ANALYSIS 13 5.1 Analysis Methodology 13 5.2 Key Intersection Operational Analysis 14 5.3 Auxiliary Turn Lane Assessment 18 6.0 CONCLUSIONS AND RECOMMENDATIONS 19 APPENDICES Appendix A - Intersection Count Sheets Appendix B -Traffic Growth Information Appendix C - HCS Analysis Worksheets Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rtf2e, CO Page i LIST OF TABLES Table 1- United Companies Scott Gravel Pit Project Traffic Generation 8 Table 2 - Level of Service Definitions 13 Table 3 -1-70 Eastbound Ramp/CR-315 LOS Results 15 Table 4 -1-70 Westbound Ramp/CR-315 LOS Results 16 Table 5 - Mamm Creek Road (North I-70 Frontage Road)/CR-315 LOS Results 17 LIST OF FIGURES Figure 1- Existing Laneage and Control 4 Figure 2 - Weekday Existing Traffic Volumes 5 Figure 3 - 2006 Weekday Background Traffic Volumes 6 Figure 4 - 2018 Weekday Background Traffic Volumes 7 Figure 5 -Project Trip Distribution 9 Figure 6 - Project Traffic Assignment 10 Figure 7 - 2006 Total Traffic Volumes 11 Figure 8 - 2018 Total Traffic Volumes 12 Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page ii 1.0 EXECUTIVE SUMMARY The United Companies Scott Gravel Pit is proposed along Mamm Creek Road (North 1-70 Frontage Road), at the Garfield County Airport Road Exit (Exit 94) of Interstate 70 (I-70) in Garfield County, Colorado. It is expected that operations at the United Companies Scott Gravel Pit project will begin in 2006 and end around 2018. Analysis was therefore completed for the 2006 short term horizon, as well as the 2018 long-term horizon. The purpose of this study is to identify traffic generation characteristics, to identify potential traffic related impacts on the local street system, and to develop mitigation measures required for identified impacts. Based on CDOT requirements, three key intersections have been evaluated within this study. These include the following intersections: • Mamm Creek Road (I-70 North Frontage Road)/CR-315, • Interstate 70 Westbound Ramp/CR-315, and • Interstate 70 Eastbound Ramp/CR-315. Primary access to the site is expected to be provided by Interstate 70 (I-70). Direct access to the project is proposed from one access driveway along the north side of Mamm Creek Road (North 1-70 Frontage Road), west of CR -315 and approximately 1/4 mile west of the existing Lafarge Gravel Pit. Operations at the gravel pit are expected to generate approximately 400 daily weekday trips. Of these, 25 trips are expected to occur during the weekday morning and afternoon peak hours. Distribution of site traffic on the street system was based on the anticipated travel patterns to and from the site provided by the client. Assignment of project traffic was based upon the trip generation described previously and the distributions developed. Based on the analysis presented in this report, Kimley-Horn believes the proposed United Companies Scott Gravel Pit will be successfully incorporated into the existing roadway network without any additional improvements to the surrounding roadway network. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 1 2.0 INTRODUCTION KimIey-Flom and Associates, Inc. (Kimley-Horn) has prepared this report to document the results of a Traffic Impact Study of future traffic conditions associated with the proposed United Companies Scott Gravel Pit to be located along Mamm Creek Road (North I-70 Frontage Road), at the Garfield County Airport Road Exit (Exit 94) of Interstate 70 (I-70) in Garfield County, Colorado. It is expected that operations at the United Companies Scott Gravel Pit project will begin in 2006 and end around 2018. Analysis was therefore completed for the 2006 short term horizon, as well as the 2018 long-term horizon. The purpose of this study is to identify traffic generation characteristics, identify potential traffic related impacts on the local street system, and to develop mitigation measures required for identified impacts. Based on CDOT requirements, three key intersections were included for evaluation in this study. These include the following intersections: • Mamm Creek Road (1-70 North Frontage Road)/CR-315, Interstate 70 Westbound Ramp/CR-315, and • Interstate 70 Eastbound Ramp/CR-315. Primary access to the site is expected to be provided by Interstate 70 (I-70). Direct access to the project is proposed from one access driveway along the north side of Mamm Creek Road (North I-70 Frontage Road), west of CR -315 and approximately 1/4 mile west of the existing Lafarge Gravel Pit. Kinzley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 2 3.0 EXISTING AND FUTURE CONDITIONS 3.1 Existing Roadway Network The proposed United Companies Scott Gravel Pit in Rifle, Colorado is to be located along Mamm Creek Road (North 1-70 Frontage Road) west of CR -315. Primary access to the site is expected to be provided by Interstate 70 (1-70). In the site vicinity, CR -315 provides a single lane of travel in each direction. The I-70 Eastbound and Westbound Ramp intersections with CR -315 both operate with stop control along the ramps. Mamm Creek Road (North 1-70 Frontage Road) provides a single lane of travel in each direction and a 35 mile per hour posted speed limit. The T -intersection of CR -315 with Mamm Creek Road operates with yield control along Mamm Creek Road. The intersection lane configurations and control for the study area are shown in Figure 1. 3.2 Existing Traffic Volumes Existing peak hour turning movement counts were conducted at the existing study intersections on Tuesday, October 18, 2005. The weekday counts were conducted during the AM and PM peak hours of adjacent street traffic in 15 -minute intervals from 7:00 AM to 9:00 AM and 4:00 PM to 6:00 PM. The count included identification of existing traffic. These turning movement counts are shown in Figure 2 with count sheets provided in Appendix A. 3.3 Unspecified Development Traffic Growth In order to obtain traffic volumes for the 2006 short term and 2018 long term horizon years, the existing traffic volumes were grown at the two (2) percent annual growth rate obtained from the CDOT website for future traffic growth projections along 1-7Q. These background traffic projections and growth rate calculation worksheets are included in Appendix B. Weekday background traffic volumes for 2006 and 2018 are shown in Figures 3 and 4. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 3 PROJECT LOCATION MAMM CREEK ROA❑ (N. FRONTAGE ROAD) IVC? FTI—I NTS 067998000 t-70 LEGEND Study Area Key Intersection Yield Controlled Intersection Stop Controlled Approach Roadway Speed Limit SCOTT GRAVEL PIT, RIFLE, CO EXISTING LANEAGE AND CONTROL FIGURE 1 ❑.n Kimley-Hom and Associates, Inc. PROJECT LOCATION MAMM CREEK ROAD (N. FRONTAGE ROAD) NC RTF -i NTS 067998000 Tuesday, October 18, 2005 AM Peak 7:05 - 8:00: PM Peak 4:45 - 5:45 Tuesday, October 18, 2005 AM Peek 7:00 - 8:00; PM Peak 4:00 - 5:00 1-70 LEGEND • Study.Area Key Intersection XX{XX) AM(PM) Peak Hour Traffic Volumes SCOTT GRAVEL PIT, RIFLE, CO EXISTING TRAFFIC VOLUMES Tuesday, October 18, 2005 AM Peak 7:15 - 8:15; PM Peak 4:45 - 5:45 -�fl dD 27(3) 0(1) —> 45(46) FIGURE 2 Kimley-Hom and Associates, Inc, PROJECT LOCATION MAMM CREEK ROAD (N. FRONTAGE ROAD) l 1%.1 c=3 1,1-1— NTS mNTS 067998000 1-70 LEGEND Study Area Key intersection XX(XX) AM(PM) Peak Hour Traffic Volumes SCOTT GRAVEL PET, RIFLE, CO 2006 BACKGROUND TRAFFIC VOLUMES FIGURE 3 o=n Kimley-Hom and Associates, Inc, PROJECT LOCATION MAMM CREEK ROAD (N. FRONTAGE ROAD) C=0F m1--1 NTS 067998000 1-70 7 LEGEND Study Area Key Intersection XX(XX) AM(PM) Peak Flour Traffic Volumes SCOTT GRAVEL PIT, RIFLE, CO 2018 BACKGROUND TRAFFIC VOLUMES 34(4) --71 0(1) --> 57(58) FIGURE 4 ECM K€coley-Hom and Associates, Inc. 4.0 PROJECT TRAFFIC CHARACTERISTICS 4.1 Trip Generation Site -generated traffic estimates are determined through a process known as trip generation. For this study, Kimley-Horn used information provided by the client to determine the number of vehicles anticipated to enter and exit the site during the AM and PM peak hours, as well as the number of vehicles anticipated to access the site per day. Table 1 summarizes the estimated traffic generation for the proposed gravel pit. Table 1-- United Companies Scott Gravel Pit Project Traffic Generation 4.2 Trip Distribution and Traffic Assignment Distribution of site traffic on the street system was based on anticipated travel patterns to and from the site provided by the client. The directional distribution of traffic is a means to quantify the percentage of site -generated traffic that approaches the site from a given direction and departs the site in the same direction. Figure 5 illustrates the expected project trip distribution for the site. Traffic assignment was obtained by applying the distributions to the estimated traffic generation of the development shown in Table 1. Traffic assignment for the site is shown in Figure 6. 4.3 Total Background Plus Project Traffic Site traffic volumes were added to the background volumes to represent estimated traffic conditions for the short term 2006 horizon and long term 2018 horizon. These weekday total traffic volumes for the site are illustrated for the 2006 and 2018 horizon years in Figures 7 and 8, respectively. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel. Pit, Rifle, CO Page 8 Daily Vehicles Trips Weekday AM Peak Hour Weekday PM Peak Hour In Out Total In Out Total Scott Gravel Pit 400 13 12 25 12 13 25 4.2 Trip Distribution and Traffic Assignment Distribution of site traffic on the street system was based on anticipated travel patterns to and from the site provided by the client. The directional distribution of traffic is a means to quantify the percentage of site -generated traffic that approaches the site from a given direction and departs the site in the same direction. Figure 5 illustrates the expected project trip distribution for the site. Traffic assignment was obtained by applying the distributions to the estimated traffic generation of the development shown in Table 1. Traffic assignment for the site is shown in Figure 6. 4.3 Total Background Plus Project Traffic Site traffic volumes were added to the background volumes to represent estimated traffic conditions for the short term 2006 horizon and long term 2018 horizon. These weekday total traffic volumes for the site are illustrated for the 2006 and 2018 horizon years in Figures 7 and 8, respectively. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel. Pit, Rifle, CO Page 8 50% PROJECT LOCATION MAMM CREEK ROAD (N. FRONTAGE ROAD) NORT1-1 NTS 067998000 U 50% 4— I-70 LEGEND Study Area Key Intersection XX%(XX%) Entering (Exiting) Trip Distribution SCOTT GRAVEL PIT, RIFLE, CO PROJECT TRIP DISTRIBUTION 50% 50% — FIGURE 5 Tr rim Kimloy-Horn and Associates, Inc. PROJECT LOCATION MAMM CREEK ROAD (N. FRONTAGE ROAD) frA NC=>RTI--E NTS 067998000 n u I-70 LEGEND ® Study Area Key intersection XX(XX) AM(PM) Peak Hour Traffic Volumes SCOTT GRAVEL PIT, RIFLE, CO PROJECT TRAFFIC ASSIGNMENT 1s 7(6} — Tr FIGURE 6 Kimsey-Hom and Associates, inc. PROJECT LOCATION MAMM CREEK ROAD (N, FRONTAGE ROAD) iV Q NTS 067998000 13(10} h 0(5) re— 29(69) 1-70 LEGEND ® Study Area Key intersection XX(XX) AM(PM) Peak Hour Traffic Volumes SCOTT GRAVEL PIT, RIFLE, CO 2006 TOTAL TRAFFIC VOLUMES FIGURE 7 Kimsey -Horn and Associates, Inc. PROJECT LOCATION II N 4-=>11=1-1-1---1 NTS 067998000 4-1(2) 53(10) 55(32) N din MAMM CREEK ROAD (N. FRONTAGE ROAD) • 12 0 r-14(11) 4-- 0(6) 37(86) T r~n � m r 1-70 LEGEND $ Study Area Key Intersection XX(XX) AM(PM) Peak Hour Traffic Volumes SCOTT GRAVEL PIT, RIFLE, CO 2018 TOTAL TRAFFIC VOLUMES FIGURE 8 ❑.n Kirn)ey-Hom and Associates, Inc. 5.0 TRAFFIC OPERATIONS ANALYSIS Kimley-Horn s analysis of traffic operations in the site vicinity was conducted to determine potential capacity deficiencies in the 2006 and 2018 development horizons at the identified key intersections. The acknowledged source for determining overall capacity is the current edition of the Highway Capacity Manual'. 5.1 Analysis Methodology Capacity analysis results are listed in terms of Level of Service (LOS). LOS is a qualitative term describing operating conditions a driver will experience while traveling on a particular street or highway during a specific time interval. It ranges from A (very little delay) to F (Iong delays and congestion). For intersections and roadways in this study area, Kimley-Horn recommends intersection LOS D as the minimum threshold for acceptable operations. Table 2 shows the definition of level of service for signalized and unsignalized intersections. Table 2 - Level of Service Definitions Level of Service Signalized Intersection Average Total Unsignalized Intersection , 1 1 1 and R r S :1 >35 and S 50 '1 >50 Definitions provided from the Highway Capacity Manual, Special Report 209, Transportation Research Board, 2000. 1 Transportation Research Board, Highway Capacity Manual, Special Report 209, Washington DC, 2000. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 13 Study area intersections were analyzed based on average total delay analysis for signalized and unsignalized intersections. Under the unsignalized analysis, the level of service (LOS) for a two-way stop controlled intersection is determined by the computed or measured control delay and is defined for each minor movement. Level of service for a two-way stop -controlled intersection is not defined for the intersection as a whole. Level of service for a signalized and four-way stop controlled intersection is defined for each approach and for the intersection. 5.2 Key Intersection Operational Analysis Calculations for the level of service at the key intersections identified for study are provided in Appendix C. The existing year analyses are based on the lane geometry and intersection control shown in Figure 2. LOS was calculated using HCS analysis software. KimIey-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 14 1-70 Eastbound Ramp/CR-315 All movements at this intersection were found to operate acceptably (LOS B or better) currently, as well as throughout the long term 2018 horizon year during both AM and PM peak hours, with and without the addition of project traffic. Table 3 provides the results of the level of service at this intersection. Table 3 - I-70 Eastbound Ramp/CR-315 LOS Results Scenario AM Peak Hour PM Peak Hour Delay (sec/veh) LOS Delay (sec/veh) LOS 2005 Existing SB Left/Through 8.2 A 8.2 A EB Left/Through/Right 10.3 B 9.8 A 2006 Background SB Left/Through 8.2 A 8.2 A EB Left/Through/Right 10.3 B 9.9 A 2006 Total SB Left/Through 8.3 A 8.3 A EB Left/Through/Right 10.5 B 10.1 B 2018 Background SB Left/Through 8.3 A 8.3 A EB Left/Through/Right 10.7 B 10.1 B 2018 Total SB Left/Through 8.4 A 8.4 A EB Left/Through/Right 11.0 B 10.3 B KimIey-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 15 1-70 Westbound Ramp/CR-315 All movements at this two-way stop controlled intersection were found to operate at acceptable level of service (LOS B or better) during the existing AM and PM peak hours. In 2006 and 2018, all movements at this intersection are expected to continue to operate acceptably (LOS B or better) during the AM and PM peak hours, with and without the addition of project traffic. Table 4 provides the results of the level of service at this intersection. Table 4 — I-70 Westbound Ramp/CR-315 LOS Results Scenario AM Peak Hour PM Peak Hour DelayL©S (sec/veh) Delay (sec/veh) LOS 2005 Existing - NB Left/Through 8.2 A . 8.1 A WB Left/Through/Right 11.1 B 11.1 13 2006 Background NB Left/Through 8.2 A 8.1 A WB Left/Through/Right 11.2 13 11.1 13 2006 Total NB Left/Through 8.3 A 8.1 A WB Left/Through/Right 11.2 B 11.2 B 2018 Background NB Left/Through 8.3 A 8.1 A WB Left/Through/Right 11.9 13 11.8 B 2018 Total NB Left/Through 8.4 A 8.2 A WB Left/Through/Right 11.9 13 12.0 _ B Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 16 Mamm Creek Road (North I-70 Frontage Road)/CR-315 All movements at the existing unsignalized intersection of Mamm Creek Road with CR -315 were found to operate at acceptable Level of service (LOS B or better) currently, as well as m 2006 and 2018, with and without the addition of project traffic during the AM and PM peak hours. Table 5 provides the results of the level of service at this intersection. Table 5 - Mamm Creek Road (North 1-70 Frontage Road)/CR-315 LOS Results Scenario AM Peak Hour PM Peak Hour Delay (sec/veh) LOS Delay (sec/veil) LOS 2005 Existing NB Left/Through/Right 7.9 A 7.7 A W13 Left/Through 1.0.7 B 9,4 A EB Through/Right 9,1 A 8.8 A 2006 Background NB Left/Through/Right 8.0 A 7.7 A WB Left/Through 10.8 13 9.4 A EB Through/Right 91 A 8.8 A 2006 Total N13 Left/Through/Right 8.0 A 7.7 A WB Left/Through 11.3 13 9.8 A EB Through/Right 9.2 A 8.9 A 2018 Background NB Left/Through/Right 8.0 A 7.7 A WB Left/Through 11.3 B 9.5 A EB Through/Right 9.2 A 8.9 A 2018 Total NB Left/Through/Right 8.0 A 7.7 A WB Left/Through 11.9 B 9.9 A EB Through/Right 9.2 A 8.9 A Kimsey -Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 17 5.3 Auxiliary Turn Lane Assessment Mamm Creek Road is a CDOT category FR roadway. Therefore, the need for auxiliary lanes was evaluated within this study. According to the State Highway Access Code for a category FR roadway, a right turn lane with storage plus taper length is required for any access with a projected peak hour right ingress turning volume greater than 50 vph. It is expected that the access will have a peak entering right turn volume of 13 vehicles per hour. Further, according to Section 3.5 of the State Highway Access Code, if the adjacent through lane carries less than 150 vehicles per hour, the lane is not needed. No traffic is anticipated to arrive and depart to the west along the frontage road from the project site; therefore no tum lanes are recommended with the proposed project. Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO Page 18 6.0 CONCLUSIONS AND RECOMMENDATIONS Based on the analysis presented in this report, Kimley-Horn believes the proposed United Companies Scott Gravel Pit will be successfully incorporated into the existing roadway network without any additional improvements to the surrounding roadway network. Kimley-Horn and Associates, Inc. 067998000/United Companies Scott Gravel Pit, Rifle, CO Page 19 APPENDICES Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO APPENDIX A Intersection Count Sheets Kimley-Horn and Associates, Inc. 067998000/ United Companies Scott Gravel Pit, Rifle, CO All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net U Tt'a#tzt Data, Groups Printed- Unshifted - Bank 1 File Name : EBRAMPS&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 1 08:00 AM 08:15 AM 08:30 AM 08:45 AM Total 3 2 1 0 6 12 8 14 4 38 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 8 0 6 11 0 11 4 0 17 5 0 46 28 0 0 0 0 0 4 0 9 0 1 7 11 0 31 1 15 5 8 10 38 0 0 0 0 0 54 41 46 47 168 Grand Total CR 315 Southbound 93 EB 170 RAMP Westbound 0 CR 315 Northbound 0 EB 170 RAMP Eastbound 0 0 Start Time Left I Thru l Right Peds Left l Thru Right Peds Left Thru Right Peds Left Thru Right Peds Int. Total 07:00 AM 0 8 0 0 0 0 0 0 0 12 12 0 9 1 11 0 53 07:15 AM 1 14 0 0 0 0 0 0 0 19 19 0 7 0 11 0 71 07:30 AM 2 16 0 0 0 0 0 0 0 28 9 0 5 0 12 0 72 07:45 AM 2 17 0 0 0 0 0 0 0 15 8 0 11 0 7 0 60 Total 5 55 0 0 0 0 0 0 0 74 48 0 32 1 41 0 256 08:00 AM 08:15 AM 08:30 AM 08:45 AM Total 3 2 1 0 6 12 8 14 4 38 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 8 0 6 11 0 11 4 0 17 5 0 46 28 0 0 0 0 0 4 0 9 0 1 7 11 0 31 1 15 5 8 10 38 0 0 0 0 0 54 41 46 47 168 Grand Total 11 93 0 0 0 0 0 0 0 120 76 0 63 2 79 0 444 Apprch % 10.6 89.4 0 0 0 0 0 0 0 61.2 38.8 0 43.8 1.4 54.9 0 Total % 2.5 20.9 0 0 0 0 0 0 0 27 17.1 0 14.2 0,5 17,8 0 Unshifted 4 27 0 0 0 0 0 0 0 37 23 0 19 0 24 0 134 % Unshifted 36.4 29 0 0 0 0 0 0 0 30.8 30.3 0 30.2 0 30.4 0 30.2 Bank 1 7 66 0 0 0 0 0 0 0 83 53 0 44 2 55 0 310 % Bank 1 63.6 71 0 0 0 0 0 0 0 69.2 69.7 0 69,8 100 69.6 0 69.8 All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www. alltrafticdata.net File Name : EBRAMPS&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 2 v0 V 0 rn4 m 0 N N 0 0 0 N In m 00 0 a 0 a CR 3 5 Out In 56 127 183 31 73 104 Total 87 200 r 0 0 27 66 4 7 a 0 0 93 11 0 Rig hl Thru Left Peds North 10/18/2005 07:00 AM 10/18/2005 08:45 AM Unshifed Bank 1 Left Thru Right Peds 0 a 0 0 0 371- 23 83 53 120 76 0 51 121 172 60 136 196 111 257 368 Out In Total CR 315 z 0 p 0 0 00 0 00 0 00 ao N N 0 0 0 m 0 am W CR315 Southbound EB 170 RAMP Westbound CR 315 Northbound EB 170 RAMP Eastbound Start Time Left Thru 1 Right I Peds Left 1 Thru I Right I Peds I 1,y fah! Left fThru 1 Right 1 Peds I Mn,Tmx Left 1 Tliru I Right i Peds 1 Op.Ta.r Int. Total I Peak Hour Analysis From 07:00 AM to 08:45 AM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 07:15 AM 07:15 AM 1 14 0 0 15 0 0 0 0 0 0 19 19 0 38 7 0 11 0 18 71 07:30 AM 2 16 0 0 18 0 0 0 0 0 0 28 9 0 37 5 0 12 0 17 72 07:45 AM 2 17 0 0 19 0 0 0 0 0 0 15 8 0 23 11 0 7 0 18 60 08:00 AM 3 12 0 0 15 0 0 0 0 0 0 12 8 0 20 4 0 15 0 19 54 Total Volume 8 59 0 . 0 67 0 0 0 0 0 0 74 44 0 118 27 0 45 0 72 257 % App. Total 11.9 88.1 0 0 0 0 0 0 0 62.7 37.3 0 37.5 0 62.5 0 PHP .667 .868 .000 .000 .882 .000 .000 .000 .000 .000 .000 .861 .579 .000 .776 .614 .000 .750 .000 .947 .892 All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net File Name : EBRAMPS&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 3 CR 315 Out In 87 1 101J Total 1 1081 RIt Thru Let Pads 4 `-► Peak Hour Data North Peak Hour Begins at 07:15 AM Unshifled Bank 1 '1 1 r' Left Thru Ri_ht Peds 0 I 1041 Out CR 315 118 [ 2221 In Total All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net Groups Printed- Unshifted - Bank 1 File Name : EBRAMPS&CR315PM Site Code : 00000000 Start Date : 10/18/2005 Page No : 1 05:00 PM 05:15 PM 05:30 PM 05:45 PM Total 2 20 1 18 1 18 1 15 5 71 0 0 0 0 0 0 0 0 0 0 O 0 0 0 O 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22 17 0 15 10 0 8 10 0 13 5 0 58 42 0 2 0 0 1 3 0 0 0 1 1 6 10 15 12 43 0 0 0 0 0 69 54 52 48 223 Grand Total CR 315 Southbound 123 EB 170 RAMP Westbound 0 CR 315 Northbound 0 EB 110 RAMP Eastbound 0 0 Start Time Left Thru Right Peds Left Thru Right Peds Left Thru Right Peds Left Thru Right Peds Int. Total 04:00 PM 04:15 PM 04:30 PM 04:45 PM 0 0 1 1 17 13 11 11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 18 12 17 9 11 7 2 0 0 0 0 4 3 2 1 0 1 1 1 4 9 14 15 0 0 0 0 50 55 48 48 Total 2 52 0 0 0 0 0 0 0 63 29 0 10 3 42 0 201 05:00 PM 05:15 PM 05:30 PM 05:45 PM Total 2 20 1 18 1 18 1 15 5 71 0 0 0 0 0 0 0 0 0 0 O 0 0 0 O 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22 17 0 15 10 0 8 10 0 13 5 0 58 42 0 2 0 0 1 3 0 0 0 1 1 6 10 15 12 43 0 0 0 0 0 69 54 52 48 223 Grand Total 7 123 0 0 0 0 0 0 0 121 71 0 13 4 85 0 424 Apprch % 5.4 94.6 0 0 0 0 0 0 0 63 37 0 12.7 3.9 83.3 0 Total % 1.7 29 0 0 0 0 0 0 0 28.5 16.7 0 3.1 0.9 20 0 Unshifted 2 17 0 . 0 0 0 0 0 0 41 6 0 7 1 23 0 97 % Unshifted 28.6 13.8 0 0 0 0 0 0 0 33.9 8.5 0 53.8 25 27,1 0 22.9 Bank 1 5 106 0 0 0 0 0 0 0 80 65 0 6 3 62 0 327 % Bank 1 71.4 86.2 0 0 0 0 0 0 0 66.1 91.5 0 46.2 75 72.9 0 77.1 All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.nef File Name : EBRAMPS&CR315PM Site Code : 00000000 Start Date : 10/18/2005 Page No : 2 e 0 E.5 D Clt 3'f5 Out in I,48 86 134 19 111 130 Total 67 197 264_ O 17 O 106 2 0 5 0 0 123 7 0 Right Thru Left Peds 4 North 10/18/2005 04:00 PM 10/18/2005 05:45 PM 0nsh'rfted Bank 1 T r Left Thru Right Peds O 41 6 0 0 80 65 0 0 121 71 0 40 168 208 47 145 192 Out In CR 315 87 313 400 Total el 0 0 0 0 00 0 00 0 00 03Om CO .3 1v 00 Peak Hour Analysis From 04:00 PM to 05:45 PM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 04:45 PM InL Tdell 04:45 PM CR 315 Southbound EB t70 RAMP Westbound CR 315 Northbound EB I70 RAMP Eastbound Start Time Left 1 Thru I Right I Peds I 4,, tee Left Thru I Right Peds I Ao,.Tui.l Left I Thru I Right I Peds I 4,T.,. Left I Thru I Right I Peds I o„_Tee. Peak Hour Analysis From 04:00 PM to 05:45 PM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 04:45 PM InL Tdell 04:45 PM 1 11 0 0 12 0 0 0 0 0 0 17 2 0 19 1 1 15 0 17 49 05:00 PM 2 20 0 0 22 0 0 0 0 0 0 22 17 0 39 2 0 6 0 8 69 05:15 PM 1 18 0 0 19 0 0 0 0 0 0 15 10 0 25 0 0 10 0 10 54 05:30 PM 1 18 0 0 19 0 0 0 0 0 0 8 10 0 18 0 0 15 0 15 52 Total volume 5 67 0 0 72 0 0 0 0 0 0 62 39 0 101 3 1 46 0 50 223 % bpp. Total 6.9 93.1 0 0 0 0 0 0 0 61.4 38.6 0 6 2. 92 0 PHF .625 .838 .000 .000 .818 .000 .000 .000 ,000 .000 .000 .705 .574 .000 .847 .375 .250 .767 .000 .735 .808 All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net File Name : EBRAMPS&CR315PM Site Code : 00000000 Start Date : 10/18/2005 Page No : 3 CR 315 Out 1n Total 1 MI Riahl Thru Left Peds 1 85{ Peak Hour Data T North Peak flour Begins al 04:45 PM Unshifted Bank 1 I Left Thru Ri'hi Peds 0 Out CR 315 2141 Total All Trac Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net Groups Printed- Unshifted - Bank 1 File Name : MAMM&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 1 08:00 AM 08:15 AM 08:30 AM 08:45 AM Total 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 10 7 4 1 22 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 8 6 24 0 0 0 0 0 8 1 1 8 18 0 0 0 0 0 0 0 0 0 0 0 0 0 4 5 8 7 24 0 0 0 0 0 23 24 21 22 90 Grand Total CR 315 Southbound 0 MAMM CREEK Westbound 0 CR 315 Northbound 1 MAMM CREEK Eastbound 0 63 Start Time Left Thru I Right Peds Left Thru Right Peds Left • Thru Right Peds Left Thru Right Peds Int, Total 07:00 AM 0 0 0 0 15 1 0 0 11 0 3 0 0 0 7 0 37 07:15 AM 0 0 0 0 12 0 0 0 11 0 2 0 0 0 9 0 34 07:30 AM 0 0 0 0 4 0 0 0 11 0 6 0 0 0 8 0 29 07:45 AM 0 0 0 0 11 0 0 0 6 0 11 0 0 0 10 0 38 Total 0 0 0 0 42 1 0 0 39 0 22 0 0 0 34 0 138 08:00 AM 08:15 AM 08:30 AM 08:45 AM Total 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 10 7 4 1 22 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 8 6 24 0 0 0 0 0 8 1 1 8 18 0 0 0 0 0 0 0 0 0 0 0 0 0 4 5 8 7 24 0 0 0 0 0 23 24 21 22 90 Grand Total 0 0 1 0 64 1 0 0 63 0 40 0 0 1 58 0 228 Apprch % 0 0 100 0 98.5 1.5 0 0 61.2 0 38.8 0 0 1.7 9&.3 0 Total % 0 0 0.4 0 28.1 0.4 0 0 27.6 0 17.5 0. 0 0.4 25.4 0 Unshifted 0 0 0 0 19 0 0 0 18 0 11 0 0 0 17 0 65 % Unshifted 0 0 0 0 29.7 0 0 0 28.6 0 27.5 0 0 0 29.3 0 28.5 Bank 1 0 0 1 0 45 1 0 0 45 0 29 0 0 1 41 0 163 % Bank 1 0 0 100 0 70.3 100 0 0 71.4 0 72.5 0 0 100 70.7 0 71.5 Alt Traffic Data Services, inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net File Name : MAMM&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 2 r- 0 0 M 0 r -v 0 0 A 0 r� 0 CR 315 Out in 0 0 0 0 Toth 0 - 0 1 o o 0 o o 0 11 0 0 0 Right Thru Left Peds 4-1 4 North 10/18!2005 07:00 AM 10/18/2005 08:45 AM Unshifted Bank 1 Left Thru Right Peds 18 45 0 0 11 29 0 0 63 0 40 0 36 96 122 29 74 103 Out In CR31S 65 160 225 Total 4-2 0 00 —I.0 0 00 00 A O Fo2 A Ln CO E 3� 4 it 0 rn rn 0 CR 315 Southbound MAMM CREEK Westbound CR 315 Northbound MAMM CREEK Eastbound Start Time Left 1 Thru 1 Right I Peds l no,_T..! Left Thru I Right € Peds i ,1,,, W.{ Left 1 Thru 1 Right! Peds I Ape, Tow Left Thru l Right I Peds I n,o, r,e., Ini Taal Peak Hour Analysis From 07:00 AM to 08:45 AM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 07:00 AM 07:00 AM 0 0 0 0 0 15 1 0 0 16 11 0 3 0 14 0 0 7 0 7 37 07115 AM 0 0 0 0 0 12 0 0 0 12 11 0 2 0 13 0 0 9 0 9 34 07:30 AM 0 0 0 0 0 4 0 0 0 4 11 0 6 0 17 0 0 8 0 8 29 07:45 AM 0 0 0 0 0 11 0 0 0 11 6 0 11 0 17 0 0 10 0 10 38 Total volume 0 0 0 0 0 42 1 0 0 43 39 0 22 0 61 0 0 ,34 0 34 138 % App. Total 0 0 0 0 97.7 2.3 0 0 63.9 0 36.1 0 0 0 100 0 PHF .000 ,000 .000 .000 .000 .700 .250 .000 .000 .672 .886 .000 500 .000 .897 .000 .000 ,850 .000 .850 .908 All Traffic Data Services, Inc 9660 W 44th Ave Wheat Ridge, CO 80033 www.alltrafficdata.net File Name : MAMM&CR315AM Site Code : 00000000 Start Date : 10/18/2005 Page No : 3 CR 315 Out to I of Total L J Ri hl IllE Lett Peds 1 f Peak Hour Data T rlorlh Peak Hour Begins at 07:CO AM Unshifted Bank 1 T r` Left Thru Right Peds. E 39�2�0� 76f Out rn CR 315 1 f37j Total