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HomeMy WebLinkAbout1.0 ApplicationCONDITIONAL USE PERMIT Date: 30 November 1990 Applicant: U.S. Department of Energy Address of Applicant: MK -Ferguson Company, P.O. Box 9136, Albuquerque, NM 87119 Conditional Use: Remediation of 2 former uranium processing mill sites located on U.S. Highway 6 adiacent to the city of Rifle, Garfield County and transportation of uranium mills tailings to an encapsulation cell on Bureau of Land Management administered land at Estes Gulch. Garfield County. Colorado. Bu 0c, /6e Legal Description: The disposal site will occupy W1/2 of NE1/4: W1/2 of SE1/4; NW1/4; and 5W1/4, all in Section 14, Township 5 South, Range 93 W. 6th PM. Garfield County. Old Rifle processing site is in NE1/4; SE1/4; NE1/4 of Sect. 16, T65 R93W. New Rifle processing site is in 5E1/4. Sect. 18; and S1/2; NE1/4, Sect. 18, T65, R93W, Garfield County. Practical Description (location with respect to highways, county roads, and residences): Disposal site is approximately 6 miles north of Rifle on Highway 13 and approximately one mile north of the highway. The Old Rifle processing site is 0.3 miles east of the center of Rifle. The new Rifle processing site is 2 miles west of the center of Rifle. Requirements: 1. Plans and specifications for proposed use. 2. Letters of approval from utility companies, sewage and water. Road access and other information deemed necessary. 3. A vicinity map drawn to scale depicting the subject property, location and use of building and structures on adjacent lots. 4. An impact statement on the proposed use where required by Sections 5.03 -5.03.12 of Zoning Regulations. 5. Notice including the name of the applicant, description of the subject lot, a description of the proposed conditional use and time and place for the hearing shall be given in the newspaper of general circulation in that portion of the County at least fifteen (15) days prior to such hearing time. Applicant shall bear the cost of advertising. 6. A copy of Assessor's map showing property; and a listing of all adjoining property owners of said property. Notice containing information described under Paragraph 5 shall be mailed to all owners of record of these lots at least 5 days prior to the above hearing by certified return receipt mail and the receipts shall be presented at the hearing by the applicant. 7. A fee of S N/A shall be charged for each application and shall be submitted with the application. This Conditional Use Permit is in compliance with Section 5.03 and 9.03 of the Garfield County Zoning Resolution and as per application. SEE APPENDIX A. List all adjoining property owners of said property. See Appendix A Attach map showing all improvements (present and proposed) and all pertinent distances and area. Show all improvements on your property and adjoining property. Attach a copy of proof of ownership for your property. (Deed, title, Insurance). The above information is correct to the best of my knowledge. Proof of Publication: Applicant: Mail Receipts: Date: Fee: Conditional Use Granted: Conditional Use Denied: Reason for Denial: F: UMTRA\RFL\CONDUSEPERMT.RFL Board of County Commissioners Garfield County, Colorado 3885 -RFL -G-01-03737-03 113090 0---V65 et/7 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPUCATION FOR CONDITIONAL USE PERMIT GARFIELD COUNTY, COLORADO Submitted By MK-FERGUSON COMPANY P.O. BOX 9136 ALBUQUERQUE, NEW MEXICO 87119 ON BEHALF OF U.S. DEPARTMENT OF ENERGY ALBUQUERQUE OPERATIONS OFFICE P.O. BOX 5400 ALBUQUERQUE, NEW MEXICO 87108 DECEMBER 1990 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CONDITIONAL USE PERMIT GARFIELD COUNTY, COLORADO APPENDIX A F:\UMTRA\CUAPPLI.RFL 3885 -RFL -G-01-03737-03 113090 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CONDITIONAL USE PERMIT APPENDIX A CONTENTS Section Page 1 INTRODUCTION 1 2 LOCATION 1 3 DESCRIPTION OF SITES 2 4 ADJACENT PROPERTIES 3 5 DISPOSAL CELL 3 6 TRANSPORTATION OF TAILINGS 4 7 HIGHWAY 13 IMPROVEMENT 4 8 TRUCK TRAFFIC 5 9 EMPLOYMENT 6 10 EQUIPMENT 7 11 HAUL SCHEDULE 7 12 SANITATION FACILITIES 8 13 LAND USE 8 14 NOISE 8 15 SURFACE WATER 9 16 GROUNDWATER 10 17 PROTECTION OF WILDLIFE 11 18 RECLAMATION 11 19 SECURITY BOND 11 20 INDUSTRIAL PERFORMANCE STANDARDS 12 EXHIBITS Exhibit A-1 LOCATION MAP 13 A-2 CITY OF RIFLE 14 A-3 OLD RIFLE SITE 15 A-4 NEW RIFLE SITE 16 A-5 ESTES GULCH SITE 17 F:\UMTRA\CUAPPLI.RFL 3885 -RFL -G-01-03737-03 113090 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CONDITIONAL USE PERMIT APPENDIX A This information is provided in support of an application for a Conditional Use Permit for the UMTRA Project at Rifle, Colorado, and is based on information in the project Environmental Impact Statement (EIS) published in March 1990 (DOE/EIS-0132-F) and filed with Garfield County Planning Department, and in the application for a Certificate of Designation for Establishment and Operation of a Solid Waste Disposal Site (CD) filed with Garfield Country in July 1990. The items of interest addressed in this appendix are listed in Garfield County Zoning Resolution (1978), Section 5.03. To avoid duplication, and where appropriate, references in the EIS and CD are cited. F:\UMTRA\CUAPPLI.RFL 3885 -RFL -G-01-03737-03 113090 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CONDITIONAL USE PERMIT 1. INTRODUCTION Two former Union Carbide mill sites at Rifle, Colorado, are being cleaned up as part of the Uranium Mill Tailings Remedial Action (UMTRA) Project, mandated by the Uranium Mill Tailings Radiation Control Act of 1978 (Public Law 95-604). The project involves the removal of uranium and vanadium mill tailings from the Rifle mill sites and their transportation to a disposal site at Estes Gulch north of the city. To facilitate transportation of the tailings to the disposal site, a truck climbing lane will be constructed along portions of the Highway 13 right- of-way. The project's Final Environmental Impact Statement (EIS) was published in March 1990. MK -Ferguson Company is the Remedial Action Contractor for the UMTRA Project. The UMTRA Project is administered by the U.S. Department of Energy (DOE), Albuquerque Operations Office. The cleanup at the Rifle UMTRA sites is being conducted under terms of a cooperative agreement between the DOE and the State of Colorado. MK -Ferguson Company is making this application for a Conditional Use Permit on behalf of the DOE. The information contained in this application is extracted from the Final EIS. Reference should be made to the EIS for an expanded discussion of the topics addressed in this application. The information herein complies with the requirements of Section 5.03 of the Garfield County Zoning Resolution of 1978, as amended. 2. LOCATION The Rifle Uranium Mill Tailings Remedial Action (UMTRA) Project sites consist of two separate tailings sites adjacent to the city of Rifle in Garfield County, Colorado (Exhibits A-1 and A-2). The eastern site is known as Old Rifle and is located on U.S. Highway 6, approximately 0.3 mile east of the center of Rifle. F:\UMTRA\CUAPPLI.RFL - 1 - 3885 -RFL -G-01-03737-03 113090 The western site, known as New Rifle, is located on U.S. Highway 6, approximately two miles west of the center of Rifle. The Colorado River is immediately south of both sites. 3. DESCRIPTION OF SITES o Old Rifle: The 22 -acre Old Rifle tailings site consists of a 13 - acre tailings pile and a nine -acre mill area. Fifty-three acres adjacent to the tailings site are contaminated with windblown tailings and debris. (Exhibit A-3). o New Rifle: The New Rifle tailings site occupies 142 acres. The tailings pile covers 33 acres, and the mill area covers 59 acres. The entire New Rifle site is contaminated, and a 63 -acre area adjacent to the tailings site has been contaminated with windblown tailings. (Exhibit A-4). o Estes Gulch: The disposal site at Estes Gulch is located in Township 5 South, Range 93 West, Section 14, approximately six miles north of Rifle. The site is between the Grand Hogback to the northeast and State Highway 13 to the southwest on Federal land administered by the U.S. Bureau of Land Management (BLM). The U.S. Department of Energy has applied to the BLM for the withdrawal of 440 acres for the UMTRA disposal site. The disposal site is also the location of borrow material. For additional information on the project sites see EIS, Section 1. F:\UMTRA\CUAPPLI.RFL - 2 - 3885 -RFL -G-01-03737-03 113090 4. ADJACENT PROPERTIES Parcels adjacent to the Old Rifle site are identified on Garfield County Assessor's maps 2177-161 and 2177-15. The County Assessor has provided the names of owners of the following adjacent parcels: Lot 023 Lot 013 Lot 022 Lot 016 Lot 014 UMETCO UMETCO State of Colorado City of Rifle Canyon Cable TV Parcels adjacent to the New Rifle site are identified on Garfield County Assessor's map 2177. The County Assessor of the following adjacent parcels: Lot 954 8LM Lot 108 UMETCO Lot 129 Lot 276 has provided the names of owners Francesca Real Estate Corporation, Houston, TX Clyde Deshert/Nicholas Glubla, Jr., Glenwood Springs, CO The Estes Gulch site is completely surrounded by BLM-administered land in Section 14 of Township 5 South, Range 93W, 6th PM, Garfield County. The access road to the site passes through Lot 018 of Garfield County Assessor's map 2129. The County Assessor has identified the owner of Lot 018 as Sam Potter of Rifle, Colorado. A permanent easement is under negotiation. 5. DISPOSAL CELL The disposal cell at Estes Gulch will cover approximately 85 acres. The stabilized embankment will be constructed partially below the existing ground surface. The cell cover will consist of, in order of placement over the contaminants, a radon/infiltration barrier, a drain layer, a frost barrier, a F:\UMTRA\CUAPPLI.RFL - 3 - 3885 -RFL -G-01-03737-03 113090 second drain layer and, finally, an erosion protection layer on the topslope and sideslopes. For information on Disposal Cell design see EIS, Section A.3 of Appendix A. 6. TRANSPORTATION OF TAILINGS The tailings and contaminated materials will be transported to the Estes Gulch site via U.S. Highway 6 and State Highway 13. An access road will be constructed from State Highway 13 to the Estes Gulch site. Trucks leaving the Old Rifle site will travel west on U.S. Highway 6 to the State Highway 13 bypass, north on State Highway 13 to the Estes Gulch site. Trucks leaving the New Rifle site will travel east on U.S. Highway 6 to the State Highway 13 bypass, north on State Highway 13 to the Estes Gulch site. The trucks will use the same routes to return to the Old and New Rifle sites. 7. HIGHWAY 13 IMPROVEMENT To accommodate the increased tailings transport trucks and decrease impacts to local traffic and road conditions, portions of Highway 13 will be improved. These improvements include construction of a paved climbing lane on the east side of Highway 13 between Highway 325 and the Estes Gulch site turnoff; a truck turnout; an intersection facility on Highway 13 at the Estes Gulch turnoff for trucks entering and leaving the highway; and improvement of the intersection of Railroad Avenue with the Highway 13 Bypass on the north side of Rifle. The possibility of repaving Highway 13, either prior to commencement of the tailings haul, or following completion of the haul, is currently under discussion by the DOE and the Colorado Department of Highways (CDOH). Dynaflect testing on sections of Highway 13 has been completed. F:\UMTRA\CUAPPLI.RFL - 4 - 3885 -RFL -G-01-03737-03 113090 8. TRUCK TRAFFIC Remedial action will result in an increase in traffic during the 17 -month haul period. The following table is excerpted from the EIS, Table 5.13 TABLE A-1 ESTIMATED INCREASES IN AVERAGE DAILY TRAFFIC DISPOSAL AT THE ESTES GULCH SITE Highway Location Remedial Action Daily 1984 Average Traffic Daily Traffic (vehicles per day) (vehicles per day) Minimum Average Maximum North end of the Rifle Bypass (State Hwy 13) 1550 State Highway 13 -State Highway 325 Junction 2700 67 801 1051 67 801 1051 For a full discussion see the EIS, Section 5.13. 9. EMPLOYMENT Preparation work at the two Rifle sites to minimize worker exposure to hazardous materials and to remove potential sources of ground and surface water contamination, will last approximately 12 months and will require an average workforce of approximately 40 workers, peaking at 69 during a period of one month. There will be two shifts per day during the tailings haul and disposal at Estes Gulch. This will require an average workforce of 104 for a 49 -month period peaking at 139 for approximately 17 months. These figures are subject to change F:\UMTRA\CUAPPLI.RFL - 5 - 3885 -RFL -G-01-03737-03 113090 depending on the construction schedule which has recently been revised from 42 months to 49 months. The actual schedule and the size of the workforce will be determined by the subcontractor. Circumstances which may impact the schedule include adverse weather conditions and government funding changes. Employment impacts are discussed in EIS, Section 5.10. 10. EQUIPMENT Since the project has not been let to bid, the number of pieces of equipment has yet to be determined. The total number of units required is tentatively estimated to be 60. Equipment will include: Highway Off -Road o Pickups o Backhoe - CAT 235 o End -dump truck (10 cy) o Grader - CAT 12 o Tractor/Belly Dump Trucks o Loader - CAT 966 o Loader - CAT 988 o Loader - CAT 992 o Roller - CAT 825 o Scraper - CAT 623 o Scraper - CAT 631 o Scraper - CAT 633 o Dozer - CAT D6 o Dozer - CAT D9 o Paving Machine o 50 -Ton Crane o 25 -Tone Crane o Water Wagons 11. HAUL SCHEDULE C0/447- /5- Waw '2- 4 e k /444 The tailings haul schedule will be the subject of negotiation with the selected Subcontractor. 7dtyi1)NA-7 F:\UMTRA\CUAPPLI.RFL - 6 - 3885 -RFL -G-01-03737-03 113090 � 12. SANITATION FACILITIES Construction facilities at the processing and disposal sites will include decontamination facilities and portable toilets. See EIS, Appendix A, Section A.3.4.3. 13. LAND USE o Rifle Sites: Both processing sites were acquired by the State of Colorado in 1988. Following remedial action, both sites will be released by the State and the DOE for any use consistent with existing land use controls and in accordance with the Uranium Mill Tailings Radiation Control Act of 1978. o Estes Gulch: Use of the Estes Gulch disposal site will result in permanent loss of 85 acres of grazing land currently used by two permittees. Construction activity may result in a temporary loss of additional acreage. Compensation or other arrangement for the loss of grazing rights will be negotiated by the BLM and its permittees. Long- term visual effects will be minimal. The stabilized pile will be flush with surrounding terrain and will not be visible from Highway 13. See EIS, Sections 5.7 and 5.9 14. NOISE o Old Rifle: Maximum potential equivalent sound levels will be approximately 75 dBA 100 feet from the construction activity. Average levels would be approximately 3dBA less, i.e.. 20dBA above existing levels, but below the\Colorado regulatory maximum of 80dBA.! F:\UMTRA\CUAPPLI.RFL - 7 - 3885 -RFL -G-01-03737-03 113090 o New Rifle: Background level at the closest residence is 56dBA. The maximum noise 100 feet from construction activity will be approximately 75dBA; the average level would be u „ _-3dBA-�-e-s-s; ..e..- 20dBA abov existing levels, but below the olorado regulatory maximum of 80dBA.) o Estes Gulch: Background level at the nearest residence is 40dBA. Noise levels will be in the 55dBA - 60dBA range at the nearest residence (1-1/2 miles away) under the most unfavorable conditions, i.e., approximately 20dBA above existing levels, but significantly below the Colorado regulatory maximum o 80dBA. These figures are based on a Phase I survey performed during 1988-1990 and available at project site office. 15. SURFACE WATER o Old Rifle: The floodplain surface occupied by the Old Rifle tailings site is about five to 10 feet above the Colorado River surface during normal flow. The surface water features at the Old Rifle site include drainage ditches and areas where there is occasional ponding of water around the edges of the site. The site is within the 100 -year floodplain of the Colorado River. o New Rifle: At the New Rifle site the main channel of the Colorado River has been artificially channeled northward by blocking alternative river channels upstream of the site. This has caused the river to swing north and erode the northern portion of a dike that protects the tailings site. The major surface water features include the vanadium ponds, evaporation ponds, various drainage ditches and several areas where there is occasional ponding of groundwater from the Colorado River. The site is within the 100 -year floodplain of the Colorado River. o Estes Gulch: Drainage from the Estes Gulch site flows into an ephemeral creek in Estes Gulch 0.5 mile southeast and 150 feet below the site. This creek joins Government Creek one mile and 280 feet below the site. F:\UMTRA\CUAPPLI.RFL - 8 - 3885 -RFL -G-01-03737-03 113090 Because of the site's distance from and elevation above any major surface drainage, the site would not be subject to flooding. Selection of a design flood event was based on Probable Maximum Precipitation (PMP) of 7.4 inches in one hour. An interceptor ditch will divert flood flows away from the cell to an adjacent stream. Riprap will minimize potential for gully erosion. Retention basins at the processing and disposal sites will be permitted under the Colorado Discharge Permit System and in accordance with the Clean Water Act, 33 U.S.C. 1342. For detailed information on project Hydrology, see EIS, Appendix E, and Certificate of Designation application, Section 3.1. 16. GROUNDWATER o Old Rifle: The alluvium at the Old Rifle site is approximately 20 feet thick, with depths to groundwater ranging from two to 12 feet below the land surface. Groundwater levels in the alluvium fluctuate more than seven feet during the year depending on the stage height of the Colorado River. o New Rifle: The alluvium at the New Rifle site is 25 to 30 feet thick and depths to groundwater range from five to 20 feet. Groundwater levels fluctuate approximately five feet during the year, depending on the stage of the Colorado River. The alluvial potentiometer surface does not extend into the tailings pile during high stage, as it does at the Old Rifle site, but remains two to three feet below the pile. o Estes Gulch: Limited, poor quality groundwater occurs beneath the Estes Gulch site in the steeply dipping beds of the Wasatch Formation. The Wasatch Formation is an aquitard which confines the uppermost aquifer. The uppermost aquifer is believed to occur at a depth of greater than 3000 feet. For a detailed discussion of Groundwater, see EIS, Section E.2 of Appendix E and Certificate of Designation application, Section 3.3. F:\UMTRA\CUAPPLI.RFL - 9 - 3885 -RFL -G-01-03737-03 113090 17. PROTECTION OF WILDLIFE There are no threatened and endangered species at the processing and disposal sites. There is one state candidate plant species, Wetherill milkvetch, at the disposal site. It will be protected by fencing during construction activities. Some wildlife mortality may result from truck traffic between Rifle and Estes Gulch since mule deer use the Estes Gulch area as winter habitat. Construction activity will occur during three months of the five-month winter migration, so mortality figures are expected to be low. Bighorn sheep may be affected indirectly by noise during the construction portion of the 49 -month project schedule. See EIS, Sections 5.6.1., 5.6.3. 18. RECLAMATION o Old and New Rifle: On completion of remedial action, disturbed areas of both processing sites will be restored with clean backfill, graded to promote positive drainage and revegetated. Disturbed wetlands at New Rifle will also be restored and/or enhanced. o Estes Gulch: On completion of the project all areas disturbed during the remedial action will be backfilled, graded and revegetated with the exception of the final embankment and access road. See EIS, Section 3.2.4. 19. SECURITY BOND MK -Ferguson Company, acting on behalf of the U.S. Department of Energy, requests a waiver of the County's optional security requirement. F:\UMTRA\CUAPPLI.RFL - 10 - 3885 -RFL -G-01-03737-03 113090 20. INDUSTRIAL PERFORMANCE STANDARDS A. Noise Levels: See Section 14. B. Vibration generated by haul and construction operations is not expected to have an effect on private residences near the processing and disposal sites. / ) C. Emissions: Smoke and nuisance dust will be control unde terms • Colorado Air Pollution Control Division Emission Permi No. 88GA190. D. Fuel Tanks: During project construction, all petroleum products will be stored in such a way as to prevent contamination of all ground and surface waters. Where appropriate, secondary containment facilities will be provided in accordance with 40 CFR 112. See Project Specifications, Section 1560, Part 1.6.B. E. Construction Water: Water will be used for vehicle decontamination, dust control and tailings compaction. Wastewater will be collected in a retention basin along with stormwater runoff from the construction area. If a discharge is necessary, the retained water will be analyzed and treated before being discharged. A joint COPS permit application has been filed for the two processing sites and also for the Estes Gulch disposal site. Colorado Department of Health Water Quality Control Division action is pending. See also Certificate of Designation Application, Sections 5.9.2. and 5.10. F:\UMTRA\CUAPPLI.RFL - 11 - 3885 -RFL -G-01-03737-03 113090 F:\UMTRA\CUAPPLI.RFL EXHIBIT A-1 LOCATION MAP - 12 - 3885 -RFL -G-01-03737-03 113090 = 0 0 < 0 ___RIO ---- I GARFIELD OMeeker WHITE 13 9 lj Jo SPRINGS SITE 1 t _ — l I — 01 LLQ QlW 1 I .../ Glenwood' Springs t ® Roar) • 2 Fork ESTES GULCH SITE BLANCOJ GARFIELD_ GLENWOOD „BORROW _ _ 0 U RIVER .m Cast • � • SITE Carbondale —7-- (NATIONAL 1 le � RIF LE_`tor o TAILINGS as Oo`0 _ _ _ MESA °ee•ac• -- _ _ _ GRAND II LUCAS MESA MESA ��� q�frer CD FOREST \o`ao° \\uita °° 1 SITE NATIONAL i�`lo 0 ---� °/t ,lZ V W OF' o ( FOREST ac..• .-11Cedued9s e, Orchard Grand Junction Mesa �;' rN o 4. iY APPROXIMATE 10 0 10 20 30 DENVER * COLORADO SCALE IN MILES A-1 LOCATION OF MAP EXHIBIT EXHIBIT A-2 CITY OF RIFLE F:\UMTRA\CUAPPLI.RFL - 13 - 3885 -RFL -G-01-03737-03 113090 EXHIBIT A-3 OLD RIFLE F:\UMTRA\CUAPPLI.RFL - 14 - 3885 -RFL -G-01-03737-03 113090 SCALE IN FEET 2 W (0 W co (7 2 J H G O u. • W Q O cc LU 0 R F (7 2 2 LLJ • LL 2 0 II II II II EXHIBIT A-3 EXHIBIT A-4 NEW RIFLE SITE F:\UMTRA\CUAPPLI.RFL - 15 - 3885 -RFL -G-01-03737-03 113090 STORAGE R 6 . sLTE 4CCESS __ -- — — — TO RIFLE - _ MIGNWAr6 _ • s15 _AGCEi' WHIR% 6 STAGING AREA - 32FT WIDE DOUBLE " . - -- -' _ ass. LEAF SWING GATE . TPAbI viCR�E9� _ R HTPMIHATIEN • � TRANSFORMER i . C Y �v [Y .• -6FEEL PROISRTY PIS II _ 111 6S2L - T" b'..e ,.• �NCRETE PZ 4LcAR SWING GATE 9FT WIDE DOUBLE mayar _ RANSFORMER 6 591 59t[ SCI" DITCH 2 R� ...MRS EWooa _ 14KPROX SVEEPI \ - -2 ER 1 /I/\, r ^✓' �, _ 'STEEL �DITCH �C014�elf� `• ' za CMOG561N T L E olttR l ,.. \. yS6 -' - :ISI - EMRCAL :+ 5934015114 93T 4. fn. �y1: .6.691E / 'gateu' J !�.'. , 0 / VP�JLE \ E IR/000 C I j i i' (III 4666 ` •Q ITCH1 I �' �.-�'•...i¢•ri =-_.. -- 1I rr -___-_-:-....;30_•-AlTEYpTES�:.Ili a ,i' Len 5 son 1, .GN-� RANT PRD: i�= 957 ▪ ,.FP r i• , -'Well _..-- 27 �T INEEL--Try 0 • C efSF6 . }S202:931 SEE NOR 41 0,ns r• _ arLEauaf[o� ;. 1014.7 AIN I 4 0 CC Or/ o NI4NWlY ]0 E SF T NNO COL- ORADO RIVER 36'6 CSP (APPROXIMATE LOCATION ONLY) 00. 0 200 400 SCALE FEET EXHIBIT A-4 EXHIBIT A-5 ESTES GULCH F:\UMTRA\CUAPPLI.RFL - 16 - 3885 -RFL -G-01-03737-03 113090 �000, 6600 8000 J' . Y,r 6p00 Idoe' • • -- ►• 5000 ..r'''" ''- 1 —_i 1.000 '0 1000 3000 SCALE IN FEET LEGEND •-•--40-- POWER TRANSMISSION LINE --- DIRT ROAD 560 REF: MODIFIED FROM THE RIFLE 7.5 MIN. USGS QUAD. EXHIBIT A-5 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CERTIFICATE OF DESIGNATION FOR ESTABLISHMENT AND OPERATION OF A SOLID WASTE DISPOSAL SITE GARFIELD COUNTY COLORADO SUBMITTED BY MK-FERGUSON COMPANY P.O. BOX 9136 ALBUQUERQUE, NEW MEXICO 87119 ON BEHALF OF U.S. DEPARTMENT OF ENERGY ALBUQUERQUE OPERATIONS OFFICE P.O. BOX 5400 ALBUQUERQUE, NEW MEXICO 87108 JULY 1990 3885-R-01-3601-00 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CERTIFICATE OF DESIGNATION FOR ESTABLISHMENT AND OPERATION OF A SOLID WASTE DISPOSAL SITE GARFIELD COUNTY COLORADO Section I GENERAL 2 GEOLOGIC DATA 3 HYDROLOGICAL DATA 4 ENGINEERING DATA 5 OPERATIONAL DATA 6 CLOSURE DATA CERTIFICATE (SI).RFL 3885 -RFL -G-01-03601-00 URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT RIFLE, COLORADO APPLICATION FOR CERTIFICATE OF DESIGNATION FOR ESTABLISHMENT AND OPERATION OF A SOLID WASTE DISPOSAL SITE 1. GENERAL 1.1 Introduction Two former UMETCO Minerals Corporation mill sites at Rifle, Colorado are being cleaned up as part of the Uranium Mill Tailings Remedial Action (UMTRA) Project, mandated by the Uranium Mill Tailings Radiation Control Act of 1978 (Public Law 95-604). The project includes the removal of uranium and vanadium mill tailings from the Rifle mill sites and their transportation to a disposal site at Estes Gulch. All of the tailings, contaminated materials, asbestos, and non -hazardous wastes will be trucked to the Estes Gulch site and placed in the disposal area. All other chemicals and hazardous materials have been packaged and transferred to a licensed disposal site. To facilitate transportation of the tailings to the disposal site a truck climbing lane will be constructed along portions of the Highway 13 right-of-way. A Final Environmental Impact Statement (EIS) was published in March 1990. Reference is made, where appropriate, to sections of the EIS which will provide additional information on specific aspects of the project. MK -Ferguson Company is the Remedial Action Contractor for the UMTRA Project. The UMTRA Project is administered by the U.S. Department of Energy (DOE), Albuquerque Operations Office. The cleanup at the Rifle UMTRA sites is being conducted under terms of a cooperative agreement between the DOE and the State of Colorado. MK -Ferguson Company is making this application for a Certificate of Designation for Establishment and Operation of a Solid Waste Disposal Site on behalf of the DOE. The information contained in this application is extracted from the Final Environmental Impact Statement (EIS) published in March 1990. Reference should be made to the EIS for an expanded discussion of the topics addressed in this CERTIFICATE (S1).RFL 1 - 1 3885 -RFL -G-01-03601-00 application. The information herein follows the format of the State of Colorado Regulations Pertaining to Solid Waste Disposal Sites and Facilities, May 1988. 1.2 ocation The Rifle Uranium Mill Tailings Remedial Action (UMTRA) Project sites consist of two separate tailings sites adjacent to the city of Rifle in Garfield County, Colorado (Exhibits 1-A and 1-8). The eastern site is known as Old Rifle and is located on U.S. Highway 6, approximately 0.3 mile east of the center of Rifle. The western site, known as New Rifle, is located on U.S. Highway 6, approximately two miles west of the center of Rifle. The Colorado River is immediately south of both sites. The disposal site at Estes Gulch is located in Township 5 South, Range 93 West, Section 14, approximately six miles north of Rifle. 1.3 Description of Processing Sites The 22 -acre Old Rifle tailings site consists of the 13 -acre tailings pile and a nine -acre mill area. Fifty-three acres adjacent to the tailings site are contaminated with windblown tailings and debris. (Exhibit 1-C). The New Rifle tailings site occupies 142 acres. The tailings pile covers 33 acres, and the mill area covers 59 acres. The entire New Rifle site is contaminated, and a 63 -acre area adjacent to the tailings site has been contaminated with windblown tailings. (Exhibit 1-D). After the removal of the tailings and contaminated materials, the Old and New Rifle sites will be restored with clean fill material to promote positive drainage. These areas will be revegetated. This will also include the creation of wetlands to replace wetlands cleared at the Old Rifle and New Rifle sites. For additional information on the Processing Sites see EIS, Section 1. CERTIFICATE (S1).RFL 1 - 2 3885 -RFL -G-01-03601-00 1.4 Description of Disposal Site Remediation will involve relocating the Old and New Rifle tailings, contaminated materials, asbestos, and wastes to the Estes Gulch site approximately six miles north of the City of Rifle (Exhibit 1-E). The site is between the Grand Hogback to the northeast and State Highway 13 to the southwest. The terrain of the site slopes gently upward to the north toward the Grand Hogback. The site is on Federal land administered by the U.S. Bureau of Land Management (BLM). The U.S. Department of Energy has applied to the BLM for the withdrawal of 240 acres for the UMTRA disposal site. This land transfer from the BLM to the DOE will be completed after the Record of Decision has been published in the Federal Register in accordance with the requirements of the National Environmental Policy Act. The land transfer will be completed prior to the construction of the UMTRA disposal embankment. The disposal site is also the location of borrow material for the radon/infiltration cover. 1.5 Disposal Cell The disposal cell at Estes Gulch will cover approximately 95 acres. The stabilized embankment will be constructed partially below the existing ground surface. The excavation for the below -grade portion of the embankment will extend to within a few feet of the bedrock. The cell cover will consist of, in order of placement over the contaminants, a radon/infiltration barrier, a drain layer, a frost barrier, a second drain layer and, finally, an erosion protection layer on the topslope and sideslopes. The radon/infiltration barrier will consist of a 36 -inch -thick layer of compacted silty and sandy clay, the upper 12 inches of which will be mixed with bentonite. A six -inch -thick drain layer of relatively coarse material (3/4 -in. max. dia.) will be constructed above the radon/infiltration barrier. Immediately above this drain layer will be placed a 36 -inch -thick frost barrier consisting of the same material as in the radon/infiltraion barrier. Above this will be placed the second six -inch -thick drain layer (1 -1/4 -in. max. dia.). The erosion protection for the topslope of the embankment will consist of a 12 -inch -thick layer of Type A (6 -in. max. dia.) riprap. The erosion protection for the embankment CERTIFICATE (S1).RFL 1 - 3 3885 -RFL -G-01-03601-00 sideslopes, including the toe ditch and berms, will consist of a 12 -inch -thick layer of Type B (10 -in -max. dia.) riprap. For additional information on Disposal Cell design see EIS, Section A.3 of Appendix A. 1.6 Transportation of Tailings The tailings and contaminated materials will be transported to the Estes Gulch site via U.S. Highway 6 and State Highway 13. An access road will be constructed from State Highway 13 to the Estes Gulch site. Trucks leaving the Old Rifle site will travel west on U.S. Highway 6 to the State Highway 13 bypass, north on State Highway 13 to the Estes Gulch access road (to be constructed), and then north to the Estes Gulch site. Trucks leaving the New Rifle site will travel east on U.S. Highway 6 to the State Highway 13 bypass, north on State Highway 13, turning onto the Estes Gulch access road and continuing north to the Estes Gulch site. The trucks will use the same routes to return to the Old and New Rifle sites. 1.7 Highway 13 Improvement To accommodate the increased tailings transport trucks and decrease impacts to local traffic and road conditions, portions of Highway 13 will be improved. These improvements include construction of a paved climbing lane on the east side of Highway 13 between Highway 325 and the Estes Gulch site turnoff; a truck turnout; an intersection facility on Highway 13 at the Estes Gulch turnoff for trucks entering and leaving the highway; and improvement of the intersection of Railroad Avenue with the Highway 13 Bypass on the north side of Rifle. Specific construction and improvement details will be determined during the preparation of the final engineering designs. For additional information on Transportation, see EIS, Section 5.13. CERTIFICATE (S1).RFL 1 - 4 3885 -RFL -G-01-03601-00 11. 0 ESTES GULCH SITE ---RIO BLANCO_ GARFIELD GARFIELD a°° MESA Frui to DeStowe r free Orchard Mesa Grand Junction 77� 50 13 789 Meeker WHITE 1 _ _L _ _ I _ 1 GLENWOOD SPRINGS WI< Y Q BORROW SITE ¢ r �m I t7 IO m RIVER New G file RIFLE_,���`,e��� TAILINGS SITE 0 Carbondale' T_ _ _ NATIONAL GV — -- ■ GRANO LLUCAS MESA SITE Shoshone Glenwood, Springs I MESA NATIONAL ' 12 :•E o et 51% t,‘• o1Z FOREST 0 Cedaredge 8c+.t FOREST DENVER COLORADO APPROXIMATE LOCATION OF MAP 10 0 10 20 30 EXHIBIT 1-A SCALE IN MILES 4 \ el„ ,,,.� LEGEND SUDDEN CHANGE IN SLOPE (DOW NWA RD) 0 EDGE OF TAILINGS —X— FENCE - $--l- RAILROAD DIRT ROAD 1 c �•, \\ , \ 26 25 \ \\ 00. ` BO `\ 1000 3000 SCALE IN FEET LEGEND � --'---POWER TRANSMISSION LINE - DIRT ROAD `2560' REF: MODIFIED FROM THE RIFLE 7.5 MIN. USGS QUAD. EXHIBIT 1-E 2.0 GEOLOGIC DATA 2.1 Soils Soils conditions at the Rifle tailings sites and the Estes Gulch disposal site were investigated using various standard techniques available to the geotechnical engineering profession. For additional information on Soils data, see EIS Appendix D. 2.1.1 Old Rifle Site - The Old Rifle tailings pile consists predominantly of very loose to medium dense, silty sands (sand -slime mixtures) covered with a thin veneer of soil. Penetration test values (2.5 -inch inside diameter) ranged from two to 30 blows per foot within the tailings. Below the tailings a medium - stiff to stiff, clayey to silty sand is found. These finer -grained, natural alluvial soils overlie dense to very sandy, gravel and cobble alluvium. Groundwater was encountered in the shallow alluvium and in a portion of the tailings. 2.1.2 New Rifle Site - The New Rifle tailings consists of very loose to dense, highly gradational sands, sand -slime mixtures (including interlayered sands and slimes), and slimes. Penetration tests (2.5 -inch diameter) as low as three blows per foot were obtained in the tailings but typically ranged from 10 to 30 blows per foot. Below the tailings pile, intermittent channels of medium - stiff to stiff, fine-grained alluvium overlie dense sand, gravel, and cobbles. 2.1.3 Estes Gulch Site - The Estes Gulch site is a pediment slope underlain by three to 43 feet of dry, hard, moderately plastic, silty clay soil with varying amounts of sand. Penetration values (2.5 -inch inside diameter) typically ranged from nine to 30 blows per foot in the upper 10 feet and exceeded 100 blows per foot below this depth. The soil is usually weakly cemented with calcium and often contains zones of pinsized holes, generally within the upper one foot. Remnants of a massive slide debris, consisting of sandstone boulders and shales, occurs on the cedar -covered ridges flanking the Estes Gulch site. The depth of the slide debris ranges from 15 feet in the lower elevations to 50 or more feet at the head of the fan -shaped slide. The slide pre -dates the erosion of the pediment slope and subsequent soil deposition within the site area. CERTIFICATE (S2).RFL 2 - 1 3885 -RFL -R-01-03601-00 2.2 Regional Geology In the Rifle and Estes Gulch area the bedrock immediately underlying the sites is the Wasatch Formation. This stratigraphic unit is divided into an upper member, the Shire; a middle member, the Molina; and a lower member, the Atwell Gulch. The variegated claystones and siltstones of the Shire member are approximately 1600 feet thick at the Rifle processing sites and several thousands of feet at the Estes Gulch disposal site. The Molina, underlying the Shire, consists mainly of sandstones and thin, interbedded claystone and siltstones. The approximate thickness of the Molina member is 500 feet. Underlying the Molina is the approximately 600 -foot -thick Atwell Gulch member, of lignite and carbonous shale. In the Estes Gulch disposal area this strata along the bluff facing Government Creek dips from 10 to 20 degrees to the southwest, while the portion of the terrace that directly underlies the disposal site dips from 65 to 75 degrees southwesterly. Underlying the early tertiary Wasatch Formation is the Ohio Creek Formation which consists of approximately 50 feet of massive conglomeratic sandstones comprised of chert and quartzite pebbles. For detailed information on Geologic data, see EIS, Appendix D. 2.3 Geologic Hazards Long-term erosion rates observed in the Colorado Plateau range from 0.1 to 3.0 feet per 1000 years. For the upper Colorado River and Gunnison River basins vertical erosion rates are about 0.1 inch per year (8.3 feet per 1000 years) and lateral cliff migration rates are 0.25 to 1.00 inch per year (20.8 to 83.3 feet per 1000 years). Within the Rifle -Grand Junction region, rates of downcutting and scarp erosion are similar to averages rates for the Colorado Plateau. Measurements of hillslope erosion on the Mancos Shale near Grand Junction show that the upper portions of the slopes were lowered about 0.25 inch during four years. Near Grand Mesa the average rate of downcutting by the Colorado River is 0.5 foot per 1000 year. Tributaries to the river show current aggradation along small ephemeral streams but are experiencing degradation along major perennial streams. Consequently, downcutting is occurring even at low elevations. CERTIFICATE (S2).RFL 2 - 2 3885 -RFL -R-01-03601-00 2.3.1 Old Rifle - The Colorado River is the major geomorphic feature affecting the Old Rifle site. The pattern of old channels in the Colorado River upstream from Rifle indicates that the river has, within recent times, occupied positions across an entire section from U.S. Highway 6 to the north to Interstate Highway 70 (I-70) to the south. The Colorado River is a cobble and boulder bed river in this reach, and the probability of future lateral shift of the channel is very high. The site at present is well protected by the massive riprap placed to protect the south side of the D&RGW Railroad. 2.3.2 New Rifle - The major geomorphic feature impacting the New Rifle site is also the Colorado River. The New Rifle site which lies downstream from the city of Rifle is also subject to lateral shift of the river. 2.3.3 sten Gulch - The geomorphic hazards at the Estes Gulch site are gully erosion, arroyo encroachment, wind erosion, and possible slope failure. Surface water runoff and wind erosion are of minor consequence if the stabilized tailings pile is properly designed. Gully erosion and arroyo encroachment have a greater potential to impact the site. The gullies that are present at the site are deeply incised indicating recent downcutting. A small pond constructed at the lower reach of the main gully system has temporarily stabilized the downcutting. The potential exists for future erosion and downcutting. Development of lateral branches of adjacent arroyos also pose a hazard to the site. The origin of at least some of the site soils is colluvial in nature, and some of the near surface soils appear to have originated from minor mudflows or surface wash. As a result, some of the site soils may exhibit a structure having the potential for collapse upon wetting. The DOE has concluded the disposal cell cover as designed will eliminate the source of these surface failures. For an expanded discussion of the Geomorphology of the Estes Gulch site see EIS, Section D.3 of Appendix D. CERTIFICATE (S2).RFL 2 - 3 3885 -RFL -R-01-03601-00 2.4 Seismicity An analysis of historically and instrumentally recorded earthquake epicenters within a 65 km radius of the site concluded that all faults and lineaments with the 65 km radius were not capable. No design -basis fault was identified in the sites region. DOE adapted a 6.2 magnitude Floating Earthquake within 15 km of the site as the design earthquake. The NRC concurs with the DOE finding that peak horizontal acceleration from the design earthquake would be .21 g. For detailed information on Seismicity, see EIS, Section D.4 of Appendix D. CERTIFICATE (S2).RFL 2 - 4 3885 -RFL -R-01-03601-00 3.0 HYDROLOGICAL DATA The existing tailings in the city of Rifle, Colorado are located in the floodplain of the Colorado River. The Estes Gulch site is located approximately six miles north of Rifle and is situated on an colluvial surface. Small ephermal streams are located in the immediate site vicinity. 3.1 Surface Features 3.1.1 Old Rifle - The floodplain surface occupied by the Old Rifle tailings site is about five to 10 feet above the Colorado River surface during normal flow. The floodplain at the Old Rifle site has been artificially narrowed at the site from over 1200 feet to 800 feet by the construction of the Interstate 70 (I-70) embankment south of the river. The surface water features at the Old Rifle site include drainage ditches and areas where there is occasional ponding of water around the edges of the site. A 36 -inch diameter reinforced concrete drain was installed during Phase I to divert off-site runoff directly to the Colorado River. 3.1.2 - New Rifle - At the new Rifle site, the main channel of the Colorado River has been artificially channeled northward by blocking alternative river channels upstream of the site. This has caused the river to swing north and erode the northern portion of a dike that protects the tailings site. The major surface water features at the New Rifle site include the vanadium ponds, evaporation ponds, various drainage ditches and several areas where there is occasional ponding of groundwater from the River. 3.1.3 Estes Gulch - Drainage from the Estes Gulch site flows into an ephemeral creek in Estes Gulch 0.5 mile southeast and 150 feet below the site. This creek joins Government Creek one mile and 280 feet below the site. At its closest point, the Colorado River is six miles away and 730 feet below the site. Because of the site's distance from and elevation above any major surface drainage, the site would not be subject to flooding. Selection of a design flood CERTIFICATE (S3).RFL 3 - 1 3885 -RFL -G-01-03601-00 event was based on Probable Maximum Precipitation (PMP) rather than on extrapolation from limited historical data. A PMP depth of 7.4 inches in one hour was used to compute probable maximum flood (PMF) at the site. Preliminary calculations for the Estes Gulch site indicate that the flow resulting from the occurrence of a PMP over the Estes Gulch watershed would be in excess of 3300 cfs. An interceptor ditch will divert flood flows away from the cell to an adjacent stream. Riprap will minimize potential for gully erosion. For detailed information on project Hydrology, see EIS, Appendix E. 3.2 Wetlands The U.S. Army Corps of Engineers (COE) has determined that there are wetlands adjacent to the New Rifle site within the Colorado River floodplain. 3.2.1 Old and New Rifle - Wetlands plant communities at the Old Rifle site cover 0.7 acre and they are composed of a cattail -dominated area, or emergent wetlands, and a shrub -dominated wetland where willow is common. The wetland vegetation grows in a narrow strip along a drainage ditch on the site. A Section 404 permit is not required for any actions to take place at Old Rifle because the area is less than one acre in size. A total of 20.4 acres of wetlands would be impacted by remedial action at or near the New Rifle site. The wetlands at the New Rifle site are under the jurisdiction of the COE and a Section 404 permit has been applied for. 3.2.2 Wetlands Impacts Mitigation - Revegetation represents the major mitigation measure to be applied to the wetlands areas at the Old and New Rifle sites. The specific details of the mitigation plan will be developed in consultation with the appropriate regulatory agencies, such as the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, and the U.S. Soil Conservation Service. General features of the mitigation plan would include: CERTIFICATE (53).RFL 3 - 2 3885 -RFL -G-01-03601-00 o Riparian vegetation adjacent to interim and remedial action work areas would be left undisturbed as much as possible. o Revegetation would occur during an appropriate season to encourage the successful re-establishment of the wetlands areas. o Fill, grading, and recontouring of disturbed areas to create conditions favorable to the reestablishment of wetland vegetation. o Use of appropriate materials and techniques that would lead to the reestablishment of wetlands. o Select use of soil erosion controls to minimize erosion and encourage the replacement of wetlands areas. For detailed information on Wetlands, see EIS, Appendix F. 3.3 Aquifers 3.3.1 Old Rifle - The alluvium at the Old Rifle site is approximately 20 feet thick, with depths to groundwater ranging from two to 12 feet below the land surface. Groundwater levels in the alluvium fluctuate more than seven feet during the year depending on the stage height of the Colorado River. 3.3.2 New Rifle - The alluvium at the New Rifle site is 25 to 30 feet thick and depths to groundwater range from five to 20 feet. Groundwater levels fluctuate approximately five feet during the year, depending on the stage of the Colorado River. The alluvial potentiometer surface does not extend into the tailings pile during high stage, as it does at the Old Rifle site, but remains two to three feet below the pile. 3.3.3 Estes Gulch - Limited, poor quality groundwater occurs beneath the Estes Gulch site in the steeply dipping beds of the Wasatch Formation. The CERTIFICATE (S3).RFL 3 - 3 3885 -RFL -G-01-03601-00 Wasatch Formation is an aquitard which confines the uppermost aquifer. The uppermost aquifer is believed to occur at a depth of greater than 3000 feet. Groundwater in the uppermost aquifer flows downdip to the southwest towards the axis of the Picence Creek Basin. For a detailed discussion of Groundwater, see EIS, Section E.2 of Appendix E. 3.4 Domestic Wells Three domestic wells completed in the Wasatch Formation 0.75 mile west of the site are not within the same hydrostatigraphic unit of the Wasatch Formation as the disposal site. These wells are located crossgradient to the disposal site and across the fault. The beds are nearly horizontal in this area, whereas, beneath the disposal site the beds of the Wasatch Formation are steeply inclined. The domestic wells are near Government Creek in an area of the Wasatch Formation that is believed to be recharged by the creek. Water quality is significantly different from that of the Wasatch Formation beneath the disposal cell. No nearby domestic wells are completed in the uppermost aquifer (the Williams Fork Formation) because of its great depth. 3.5 Hvdroloqic Properties of Aquifers 3.5.1 Old Rifle - Hydraulic conductivities at the Old Rifle site average 200 feet per day (ft/day) in the alluvium and 0.03 ft/day in the Wasatch Formation. Average linear groundwater velocities are 840 feet per year (ft/yr) in the alluvium and 0.3 ft/yr in the Wasatch Formation. Effective porosity is 0.27 and the hydraulic gradient is 0.003. 3.5.2 New Rifle - Hydraulic conductivities at the New Rifle site average 70 feet per day (ft/day) in the alluvium and 0.46 ft/day in the Wasatch Formation. Linear groundwater velocities are 280 feet per year (ft/yr) in the alluvium and 0.3 ft/yr in the Wasatch Formation. Effective porosity is 0.27 and the hydraulic gradient is 0.003. CERTIFICATE (S3).RFL 3 - 4 3885 -RFL -G-01-03601-00 3.5.3 Estes Gulch - The average hydraulic conductivity of the Wasatch Formation at Estes Gulch is 9 x 10-` ft/day (3 x 10' centimeters per second (cm/s). 3.6 Water Quality 3.6.1 Old Rifle - Background quality in the alluvium at the Old Rifle site is characterized by concentrations of molybdenum, selenium, uranium, and gross alpha activity that exceed the maximum concentration limits (MCLs) of the proposed EPA groundwater protection standards. 3.6.2 New Rifle - Background groundwater quality in the alluvium at the New Rifle site is characterized by concentrations of molybdenum, selenium, uranium, and gross alpha activity similar to those at Old Rifle and in excess of the proposed EPA MCLs. 3.6.3 Estes Gulch - Background groundwater quality in the Wasatch Formation aquitard beneath the Estes Gulch site is poor. Water quality from three monitor wells near the disposal site contained TDS ranging from 8,260 to 24,300 mg/1 and concentrations of barium, cadmium, lead, molybdenum, and selenium that exceeded EPA standards. Because of the great depth to the uppermost aquifer beneath the disposal cell, and because of the probable upward potentiometric gradient from the uppermost aquifer, contaminants are unlikely to reach the uppermost aquifer during the design life of the disposal cell. Consequently, the water resources protection strategy is based on meeting MCLs at the Point of Compliance. For detailed information on Water Quality, see EIS Appendix E. CERTIFICATE (S3).RFL 3 - 5 3885 -RFL -G-01-03601-00 4.0 ENGINEERING DATA Disposal will involve relocating the Old and New Rifle tailings and contaminated materials to the Estes Gulch site, excavation of a disposal area averaging 20 feet in depth, placement of all contaminated materials in the excavated cell which will then be covered with an earthen radon barrier; frost protection, drain, and filter layers; and a rock erosion protection barrier. The design requires the following remaining activities: 4.1 Old Rifle and New Rifle Sites o Upgrading of the access road from each site to U.S. Highway 6. o Protection (or relocation) of surface or subsurface utilities at each site during construction. o Installation and operation of a wastewater treatment facility to prevent release of waterborne contaminants during construction. o Dewatering of the tailings and alluvium beneath the tailings at the Old Rifle site. o Excavation and stockpiling of the tailings and contaminated materials at each site, and contaminated materials from the vicinity properties. o Relocation (by truck) of all of the tailings and contaminated materials, including sediments from the wastewater retention basins and temporary drainage ditches, from the sites to the Estes Gulch site. o Restoration of the disturbed areas at and adjacent to the sites with clean fill material and grading to promote positive drainage. Includes revegetation of all disturbed wetlands areas. CERTIFICATE (S4).RFL 4 - 1 3885 -RFL -G-01-03601-00 4.2 Old Rifle. New Rifle and Estes Gulch Sites o Implementation of measures to control erosion and sedimentation from disturbed areas at each site during construction. 4.3 Estes Gulch Site o Installation of temporary security fence at the sites. o Construction of a wastewater retention basin(s) at each site to protect against releases of contaminants from the sites during remedial action. o Construction of a truck washing station at each site. o Construction of drainage control measures at each site to direct all wastewater and storm -water runoff to the retention basin(s) during construction. o Construction of a paved 12 -foot -wide, 7500 -foot -long climbing lane on the east side of Highway 13 between Highway 325 and the Estes Gulch site turnoff; an 800 -foot -long, 12 -foot -wide truck turnout; and an intersection facility on Highway 13 at the Estes Gulch turnoff. o Construction of a one mile access road from State Highway 13 to the site. o Construction of a 10 -acre staging area at the site. o Excavation of the partially below -grade disposal area with stockpiling of the excavated earthen materials. o Placement of the tailings and contaminated materials, including sediments from the wastewater retention basin(s) and temporary drainage ditches at the site, in the disposal area. CERTIFICATE (S4).RFL 4 - 2 3885 -RFL -G-01-03601-00 o Placement of a compacted, earthen radon barrier over the consolidated tailings and contaminated materials to inhibit radon emanation, water infiltration, and plant root penetration. o Placement of a 0.5 -foot -thick layer of drain material, and, beneath it, a 3.0 -foot -thick frost protection layer, consisting of loosely compacted soils excavated from the Estes Gulch disposal site. o Placement of a rock erosion protection barrier with an underlying filter layer over the frost protection system and the radon barrier to inhibit wind and water erosion and penetration by burrowing animals. o Grading the top surface of the pile nearly flush with the east and west ridges, and with the existing terrain slope of about 6.5 percent. The slope at the toe of the pile would be graded to a maximum of 20 percent. o Grading of the terrain adjacent to the embankment to promote sheet flow and the construction of rock -filled key trenches at the embankment and existing terrain interface. o Grading and riprap on the upland drainage area to the north, and the construction of an unlined interceptor ditch to divert surface runoff away from the pile. o Construction of a rock -armored toe ditch, founded in bedrock, along the southern base of the stabilized tailings pile to collect runoff from the embankment surface and adjacent areas and convey it westward, and to minimize or eliminate headward advancement of adjacent surface drainages. o Installation of permanent monuments with warning signs around the stabilized tailings pile and adjacent erosion protection features to discourage inadvertent human intrusion. o Reclamation, including revegetation as required, of all areas disturbed at the site during remedial action. CERTIFICATE (S4).RFL 4 - 3 3885 -RFL -G-01-03601-00 For additional information on engineering and design, see EIS, Paragraph 3.2.4 of Section 3.0 and Appendix A. 4.4 Final Conditions 4.4.1 Old and New Rifle - After remedial action, the Old and New Rifle sites and adjacent disturbed areas will be restored with clean fill material, graded to promote positive drainage, revegetated, and released for any use consistent with existing land use controls. Disturbed wetlands areas at both sites will be revegetated. 4.4.2 Estes Gulch - The stabilized tailings pile will cover approximately 95 acres at the Estes Gulch site . The top of the pile will slope down a maximum of 6.5 percent toward the south, and the slope at the toe of the pile will be a maximum of 20 percent (five horizontal to one vertical). The stabilized pile will be flush with the adjacent ridges. The rock erosion protection barrier covering the pile will extend to bedrock. It will also be tied into the rock -lined toe ditch to the south, the rock -filled key trenches to the east and west, and both the unlined interceptor trench and the graded, riprap-covered area of the upland drainage area to the north. These design features will divert surface water runoff away from the pile and prevent the headward advancement of drainages into the pile. Permanent markers with warning signs will enclose the stabilized pile and adjacent graded drainage areas, encompassing a total restricted area of approximately 140 acres. 4.5 Cell Performance The cell will comply with the proposed EPA groundwater protection standards because the average linear velocity in the Wasatch Formation is less than .01 ft/yr. Consequently, contaminated groundwater will travel less than 100 feet in 1000 years, the design life of the disposal cell. This is approximately the distance from the perimeter of the tailings to the down -gradient edge of the riprap. CERTIFICATE (S4).RFL 4 - 4 3885 -RFL -G-01-03601-00 4.7 Facility Plans Preliminary construction drawings are included which show the existing site conditions, proposed temporary construction facilities, and the proposed final site conditions at the processing and disposal site. These drawings are currently under review by DOE, the Nuclear Regulatory Commission (NRC), and the State of Colorado and may undergo modification before they become final. The next phase of construction drawings (Final for Signature) are scheduled for completion in September 1990. 4.8 Noise Daytime noise from construction equipment will temporarily disturb residents near the tailings, disposal, and borrow sites and along the transportation routes. Estimated maximum noise levels at the residences closest to the Old and New Rifle sites are 83 and 76 decibels respectively. Daytime noise levels near the Old and New Rifle sites will be elevated over 20 dBA above existing levels. Estimated maximum noise levels at the residences closest to the Estes Gulch site are 54 to 57 decibels. Maximum noise levels along the transportation route are estimated to be 80 decibels. The DOE will abide by all applicable noise abatement permits. For additional information on Noise, see EIS, Section 5.8. CERTIFICATE (S4).RFL 4 - 5 3885 -RFL -G-01-03601-00 LIST OF DRAWINGS Exhibit Np Drawing No Title 4-A RFL -PS -10-0705 Site Plan - Old Rifle 4-B RFL -PS -10-0709 Final Grading Plan - Old Rifle 4-C RFL -PS -10-0710 Site Plan - New Rifle 4-D RFL -PS -10-0714 Final Grading Plan - New Rifle 4-E RFL -DS -10-0715 Tailings Embankment Site Plan 4-F RFL -DS -10-0716 Test Pit and Boring Location Plan 4-G RFL -DS -10-0717 Access Control and Staging Area - Plan and Details 4-H RFL -DS -10-0718 Embankment - Foundation Excavation 4-I RFL -DS -10-0719 Temporary Site Drainage and Construction Facilities Plan 4-J RFL -DS -10-0720 Temporary Site Drainage Retention Basin Section and Details 4-K RFL -DS -10-0721 Temporary Site Drainage Profile and Sections 4-L RFL -DS -10-0722 Final Site Grading and Drawing Plan 4-M RFL -DS -10-0723 Tailings Embankment Sections 4-N RFL -DS -10-0724 Tailings Embankment Details 4-0 RFL -DS -10-0725 Permanent Site Drainage Interceptor Ditch Profile and Sections 4-P RFL -DS -10-0726 Permanent Site Drainage Toe Ditch Profile and Sections CERTIFICATE (S4).RFL 4 - 6 3885 -RFL -G-01-03601-00 1° f ) �,�EXISTING TAILINGS PILE lT0 BEREM zss it (1 EXISTING / TEfl / E RTENT RASI �N BASIT NLN; l I, ��I N 27,000 0 0 m w 1 \ N N 26,500 2 • 2• r \ "Jc \}-74- Q --- so 53 3i6 NO % 1 �` P�N26108-. 531P 1 N 25 940 E 59,900 72 C6, 5310 �� 7-0 • p" N 25' 7637 E60,01R' 765' e43, 7-4 _ . N 25,500 -- hM a» C!) C 5k6 6f { 5317 N25,000-- - 53( oe: �0 \ CPETC\ORA VERT C= 100 0 100 200 SCC SCALE FEET 0 A 6141 0 OAT 1. ( i 0 0 0 1 j IGHWAY 6 1: <A; ASBESTOS AND HAZARDOUS 0 0 0 0 W .._ EXISTING 40 FW NG S DOUBLE LEAF SWING. GATE. -,; DECONTAMINATION PAD I 7 �1 fi 1, I, % DITCH z �V\ I,/ TER WASTEW PUMP I RETENTIONNBASIN 2 1� N WASTEWATER.. -TREATMENT PLANT PAD - WASTEWATER RETENTIONBASIN I S HIGHWAY 70 WEST' BOUND U.5 HIGHWAY 70 EAST_ BOUNO J1 {I\• COLORADO R/VER 36"0 CSP (APPROXIMATE LOCATION ONLY) 200 0 200 400 SCALE FEET (r. n % DITCH N 25,000 N29,000 -- N23,000 N23,000 0 0 0 0 0 0 AREA TO BE BACKFILLED TO /ORIGINAL GROUND SURFACE 'l c N 4,420 P i 25 s a, ye - 0 7:4 • 5275 ; . ✓iceB �2 -o l ._._4.- 5272 - 286--"`r— 5282 l' YP ❑ ~ 527Q i i I o L�. n » 0 [ L .. 8�.52se 7 3504 29 680 11 c 11 .c. E (CI AREA TO BF/OAC/7 7 KFIL TO ORIGINAL b 'UND" SURFACE,*- C 7).4 /, 1/4 -4 C' t ' I- rtP ; .7-1��;i, i 0 / f1 S - :A-St'53 459' , r > 4 ' 2. _ 4"--5 ._ r o. — P - — — - "-- - - -*--COLOR ADO RIVER NO REMOVAL OF RADIOACTIVE MATERIAL IN THIS AREA (SUPPLEMENTAL STANDARDS TO APPLY 200 0 200 400 SCALE FEET 3.3 14 0 of 01 p Z E 55000 �- 81 a; a a 2 Z O P_ R. -}- 8 05 Z I T 8I '/� Z ...T 8 N Z 8 tri N Z + r z a 0 \F ww E 54000 1 _+.. w tel Z CO .... .:.. INTERCEPTOR DITCH -- .� a a0 -F WW Wo - - APPROXIMATE ACCESS ROAD ALIGNMENT + + + TOE DITCH a -- W Z RI E 53000 _ Q K I w So S EXISTING BLM STOCK DAM I' (TO BE RELOCATED) a O4R/eS E 52,000 p oIII—+. -- te o TAILINGS EMBANKMENT 0 to O 0 a o -{- -} 2=0_200 J a + + w a UU tu E 51.000 _ L- it_ to 411r + � + _ y gyp. 0 jT 1 400 0 900 800 SCALE FEET 2 K-F NO. NG o � o 0 0 � N N z E 54,000 INTERCEPTOR- _DITCH ME8-8 TP -926 E 53,000 TP -934 84011 MET -8-B aI TeTB921 -- ,TP -938 878 961 J MEB-9 341- Y TP -932 MEB 3 BTer _. TB 8-920 I TP -936 .4- +9113-922 714 .-y TP -931 ns 9 3 96 GTB-925 (GTB-917)SEE NOTE /. 701 opMEB-6 TI'925 , rC TOE DITCH 722 APPROXIMATE LIMIT OF TAILINGS E 51,000 i 2000 — 0 200 400 SCALE FEET FOR INFORMATION ONLY NOTES: THE HOLE NUMBERS IN PARENTHESIS ARE THE HOLE NUMBERS USED IN THE DRAFT RAP. SEE SPECIFICATION SECTION 2090 FOR SEALING OF MONITORING WELLS. REFERENCE DRAWINGS: LEGEND: +712 ANGLE HOLE BY 'P UMTRA TECHNICAL ASSISTANCE CONTRACTOR 955 GT0-922 TP -930 yMEB 6 MET -4 MONITORING WELL BY UMTRA TECHNICAL ASSISTANCE CONTRACTOR BOREHOLE BY UMTRA TECHNICAL ASSISTANCE CONTRACTOR TEST PIT BY UMTRA TECHNICAL ASSISTANCE CONTRACTOR BORE HOLE 8Y MK-FERGUSON 11987) TEST PIT 8Y MK-FERGUSON 11987) EXHIBIT 44 U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO Pp'\OAMC M ED IEC ,, 11 NED r`DR CHECKED PC - IHSPEcU5 RSCO ME4D ESTES RGULCH DISPOSAL IFLE, SITE COLORADO PHASE IL CONSTRUCTION MONITORING WELL, TEST PIT AND BORING LOCATION PLAN 4 No. I DATE Evill DOE APP - APPROVED OATE MORRIISON•KNUDSEN ENGINEERS, INC. UMTRA PROJECT W,<w0WS,. SMI mu,caco. CA WS DOE PR0JECT ENOINEE DATE DE- AC04-83AL18796 DM RFL -DS -10-0716 mem THE LAYOUT SHOWN IS A SUGGESTED —��-LAYOUT. THE SUBCONTRACTOR MAY ADAPT TI -119 DESIGN TO SUIT HIS OPERATIONS. DUMMY GROOVE JOINTS (SEE NOTE I1 THICKEN LONGITUDINAL EDGE ON ONE /SIDE OF PAD AS SHOWN AND TRANSVERSE EDGES AT ENDS OF PAD 30'-0 .192" SEE TYPICAL CURB DETAIL 4-0 CONCRETE PAVEMENT WITH WELDED WIRE MESH BACKFILL AS REQUIRED 20'-0 (TYP) CURB AND GUTTER WASHWATER COLLECTION SUMP 100'- 0 DECON PAD JOINT LAYOUT NOT TO SCALE C.TRAILER WELDED WIRE MESH, 6x6-WI0 x WI0� SEE NOTE 3 6" SU8-BASE (CLASS 2) CURB AND GUTTER COMPACTED SUBGRADE –�-s 3% SLOPE SECTION NOT TO SCALE 5/8"0 DOWEL BAR (TYP.I 3/4"21 DOWEL BAR 6 IB G.C. C" BASE COURSE SS=001 / 8" CLASS 6 AGGREGATE N56 100 E 53 720 3/4"Ox 15' DOWEL BAR ©18' CENTER FOR CONSTRUCTION JOINTS ONLY CONSTRUCTION JOINT (IF REQUIRED), SEE NOTE 2 1/4" WIDE DUMMY GROOVE JOINT WITH FIELD MOLDED JOINT SEALER //2" CONCRETE 3" SLOPE 2 I/4" S=003 1 I TO DRAM 856 070 E53,855 N55pro 153,600 30' WIDE DOUBLE LEAF SWING GATE 0 24 W IDE DOUBLE LEAF SWING GATE 480RATORY ACCESS CONTROL AREA SUBCONTTRACTOR'S TRAILE N55,850 653,800 HOLDING TANK ACCESS CONTROL MONITORING AND STAGING AREA PLAN NOT TO SCALE r�sv 6" THICK GRANULAR BASE (CLASS 6) 4-0 TAPER (BOTH ENDS) FILL /SUBGRAD 4'''- E K...ThN_________ SECTION NOT TO SCALE O 8" THICK CONCRETE WELDED WIRE MESH, 6 x 6 - WIO xWI0 5.0 02 6" THICK CLASS 6 GRANULAR BASE TYPICAL CURB DETAIL NOT TO SCALE `4" SUB -BASE COURSE CLASS 2 AGGREGATE THE DETAILS SHOWN ABOVE ARE A SAMPLE DESIGN. THE SUBCONTRACTOR MAY ADAPT THIS DESIGN TO SUIT H15 OPERATIONS. 50'-0 6" CLASS 6 AGGREGATE BASE S"0 02 18" CLASS 2 AGGREGATE SUBBASE TYPICAL SECTION AT WASTEWATER TREATMENT PLANT PAD NOT TO SCALE NOTES: BACKFILL AS REQUIRED I. DUMMY GROOVE JOINTS SHALL BE FORMED OR SAWED. 2. CONSTRUCTION JOINTS IF REQUIRED SHALL BE LOCATED AT TRANSVERSE DUMMY GROOVE JOINTS ONLY. DOWEL BARS SHALL BE LUBRICATED BEFORE RESUMPTION OF PAVING. 3. CURB AND DECON PAD SLAB SHALL BE CAST AT THE SAME TIME. SEAL CRACKS IN CONCRETE WITH JOINT SEALER.. 5. THE SURFACE WATER FROM THE DECON PAD SHALL DRAIN TO SUMP. 6. CONCRETE SHALL BE 3000 PSI. REFERENCE DRAWINGS: RFL -DS -10-0719, TEMPORARY SITE DRAINAGE (SHEET I OF 3) RFL - DS -10- 0715, TAILINGS EMBANKMENT SITE PLAN EXHIBIT 4-G U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO DESOSG/RED 9P51 CY.ECREDu DRAWN AMC FOR INFORMATION ONLY 1 iNSPEOTTED i RECO M MELDED ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE 11 CONSTRUCTION ACCESS CONTROL AND STAGING AREA PLAN AND DETAILS APPRUVED DATE DOE PROJECT ENGINEER DATE 110 DATE R E VI 810 115 BY Cx L:41. CEE TAC 00A ENING. REV QP MORRISON-KNUDSEN ENGINEERS, INC. UMTRA PROJECT 011ASC1500 0.0805 PROJECT NO. .DE- AC04-83AL18796 °NAMING NJ RFL- DS -10-0717 RC J 0 0 .>-,,---.-N-s.--., \-\I---:, - ' „: -.-.[-N- _„.--� .�. � ff- ���: [(0000., \h1, i \ \ J\) \\\ ��PDX E EXCAVATIO'BOUNDARY ,\ /S.\ I N58 095 E53.905 . i 7E53,195 7N578l0 \\\\ %i// / IIS \ \ 52,000 IVO! J 690 [52,690 Jam' i L N57292 [52,410 N571152 E 52,412 - --z -, ., V SVA N \\\• \ill \\zi 7 N 58,185! E 52,380 J N57940 E52,230 /5--t 52,000 N57,810 - E52,010 N57554 652,025 \)il JJ� Ir, \ 5 i \\\. '. 1i / 200 0 200 400 SCALE FEET FOR INFORMATION ONLY DESCNE0 ORANH 1 AMC ECXED INSPECTED R ECOMM E.V9ED NOTES: 1. FOR EXCAVATION DETAILS REFER TO SPECIFICATION 02200. 2. EXCAVATION CONTOURS ARE APPROXIMATE ONLY AND MAY 8E ADJUSTED DURING EXCAVATION TO REFLECT SUBSURFACE CONDITIONS. COORDINATE POINTS ARE APPROXIMATE ONLY AND MAY BE ADJUSTED IN THE FIELD. MATERIAL SUITABLE FOR RADON BARRIER IS LOCATED WITHIN THE AREA BOUNDED BY THIS LINE. MATERIAL SUITABLE FOR RADON BARRIER MAY NOT BE USED FOR ANY OTHER PURPOSE WITHOUT THE CONTRACTORS APPROVAL. REFERENCE DRAWINGS: LEGEND: EXHIBIT 4-H U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE If CONSTRUCTION EMBANKMENT L FOUNDATION EXCAVATION APPROVED / OOZE DOE PAOJECT EI'i,XEER DATE QA NO DATE ME -P E VI0IO115 AY CKE BD cHiTAC 000 1150 ENO REV APP MORRISON-KNUDSEN ENGINEERS, IN0 UMTRA PROJECT POWARIP ST Sky CA.9.GS PROJECT N0. DE- AC04-83AL18796 CRANING ^0 RFL-DS-10-0718 APV C E54,000 ARCHAEOLOGICAL SITE 5GF 1464 • -—_ = ,'ARCHAEOLOGICAL: SITES 5GF 1465 30 APPROXIMATE LIMIT OF FINAL GRADING (INCLUDING DITCHES) OF PERMANENT ' / F INTERCEPTOR DITCH_i ] l )) "7.7615€3,76o -'/ E53 510 i' 24'-0 CHAIN`^ LINK, DOUBLE LEAF SWING GATE N56,070 E 53,855 NOTES: COORDINATE POINTS AND BEARINGS ARE APPROXIMATE ONLY AND MAY BE ADJUSTED IN THE FIELD. TEMPORARY DRAINAGE FACILITIES REQUIRED DURING WINTER, SHUTDOWN WILL DE THE CONTRACTORS RESPONSIBILITY. N55.850 553,800 _APPROXIMATE LIMIT OF \ , CONTAMINATED MATER ALS,' ' STOCKPILE AREA FOR EXCAVATED RADON/FROST BARRIER MATERIAL AND IMPORTED RIPRAP (UNCONTAMINATED MATERIAL ONLY) ) �- 1 I , �. 855,870 WASTEWATER TREATMENT E 53.600 PLANT PAD 155,890 I (.'E53,420 DEER FENCE AND GATE:_ CL OF 'TEMPORARY COLLECTION DITCH 858,820 N56,990 E51,710 C<'N57,220. \, °:551,440=- O FOR INFORMATION ONLY 1 CATE REVISIONS DESIGNED rb l Ew. REFERENCE DRAWINGS: RFL -DS -10-0717, ACCESS CONTROL AND STAGING AREA PLAN AND DETAILS RFL- DS -10-0720, TEMPORARY SITE DRAINAGE RETENTION BASIN SECTION AND DETAILS RFL- DS -10-0721, TEMPORARY SITE DRAINAGE PROFILE AND SECTIONS LEGEND: X6(5 N 58 006 E 52,000 7 )1 T T sx 200 SCALE EXISTING SITE FEATURES 6 CONTOURS 11982 SURVEY ) CONSTRUCTION GRID COORDINATES fL TEMPORARY DRAINAGE DITCH EXCAVATION E MBP NKNI E NT TEMPORARY CHAIN LINK FENCE TEMPORARY WOVEN WIRE FENCE DEER FENCE EXHIBIT 4-1 0 200 400 FEET U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO DRAWN 88 CHECKED HAT IN SF SGIE .5b APPROVED ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE Il CONSTRUCTION TEMPORARY SITE DRAINAGE AND CONSTRUCTION FACILITIES PLAN DATE DOE PROJECT ENGINEER ATE 9Y c, EBD CHIEF TAC ODE GH ENG. REV. APP. MORRISON-KNUDSEN ENGINEERS, INC. UNRRA PROJECT eG HD OPO ST. Sul mwcoco. CA DDSs PROJECT NO. DE- AC04-83AL18796 DRAWING NO. RFL -DS -10-0719 0 rT • 11" X56 548/ 653,020 EL.5993.0� N56 424 r \-_J 600‘,EL. 5990.6 653,482 S=0.005 0 of ---. _ -- COLLECTION DITCH 56 50 N 561,263 652;•31 El SPILLWAY 599 5990 EE EMERGENCY SPILLWAY 8 WEIR PLAN w 0 w w 6010 - 6000 - 5990 - 5980 - E L. 59912 RETENTION BASIN DETAIL ( RFL- PS -10-0719) 50 0 50 100 Weise SCALE FEET SEE ANCHOR TRE((CH TYPICAL DETAIL 0 v EXISTING GROUND SURFACE 59985 MEMBRANE LINER 11 5_0.010 SEE INLET PLAN - I 6000- 1- w 5990- z 0 1- N 5980 - ww NOTE, COORDINATE POINTS ARE APPROXIMATE ONLY AND MAY 6E ADJUSTED IN THE FIELD. COMPACTED FIL 100_ 0 10 20 tsetnniannen VERTICAL SCALE FEET 0'-0 L EL. 5998.2 50 0 50 100 HORIZONTAL SCALE FEET 5998 5 3 w¢ D Z 30- 9 '--SEE SECTION ON CG. NO RFL- DS -10-0717 E,._ RETENTION BASIN�Y 5970 - IMIT OF MEMBRANE LID ER EL.5998.5 TOP OF DIKE EL.5996.5 SPILLWAY CREST EXISTING GROUND SURFACE 3 SPILLWAY OUTLET BASIN SECTION NOT TO SCALE 10,-0 SINGLE THICKNESS MEMBRANE LINER DOUBLE THICKNESS MEMBRANE LINER r-EL.59840 TOP OF TRAIN IN 3 WALL ANCHOR TRENCH 3'-01(MINI --_-S=0.01 11 TYPICAL DETAIL BACKFILL ANCHOR TRENCH ,-MEMBRANE LINER MEMBRANE LINER ANCHOR TRENCH (TYP.) 56 137 E 53,392 EL. 5997.6 INLET PLAN (17) NOT TO SCALE l RETENTION BASIN SSA / TIPC) 11-21. I5'-0 RIPRAP TYPE A TYPEE C 12° THICK O ✓ BIKE 3 6010 6000 5990 - 5980 ELEVATION - FEET 5' 0 Li_ 31 (TYP)-41 SPILLWAY EL.5996.5 REST /h --MEMBRANE LINER 40-0 d I M I_ 15'-0 MEMBRANE LINER ANCHOR TRENCH (TYP.) Z' I 16 NOT TO SCALE DRAINAGE MATERIAL,TYPE 01 6" THICK REFERENCE DRAWINGS: RFL -DS -10-0719, TEMPORARY SITE DRAINAGE AND DIKE --y i- CONSTRUCTION FACILITIES PLAN. I 1 7- _ -- I EROSION (RIPRAP) PROTECTION` 4 E 1 I- I L. 81-0 J EMERGENCY SPILLWAY d WEIR PLAN NOT TO SCALE LIMIT OF MEMBRANE LINER } 5 TRAINING WALL (TYP.) LEGEND: 1. EXCAVATION L L EMBANKMENT EXHIBIT 4-J O U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO FOR INFORMATION ONLY j 0E5IGNEO RAM'N /2 / �]AMC ECN8. f1`39' 1,,,,,_ 00 SPE CT CO n[_91VUEND APPROVED CD ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE II CONSTRUCTION TEMPORARY SITE DRAINAGE RETENTION BASIN SECTION & DETAILS DA OAT 910X9 9 ON 90 TAC PEG 009 APP MORRISON-KNUDSEN ENGINEERS, INC. oORRIION 71.011.,0 AAAA UMTRA PROJECT iso HewMD 30. Sw •R. W [ISCO. 09 91105 PROJECT No. DE-AC04-83AL18796 D N0. RFL -DS -10-0720 G 6040 N. A 6030 - PI/S 7- LL ELEVATION 6020 - 6010 - 5990 6260 - w w 6240 ELEVATION 6220 6200 6180 TYP. SECTION 0+00 2+00 PI 10 0 10 20 VERTICAL FEET 100 0 100 200 rti—a HORIZONTAL FEET 4+00 CONTROL POINT STATION ELEVATION Q 0+45 6184.0 PIA P1IL 3 +00 6191. 2 Pivl 8+50 6228.5 A 10+50 6220.0 7 / t SAO 027 /� •�-ZFil Pi® 6+00 / / EXISTING GROUND SURFACE -6-10025 PIA •— / \�� 8+00 10+00 STATION / 5 / =0.005 -..... -T. PI NJ CONTROL POINT STATION ELEVATION Q 2 + 60 6034.0 PIQ 2+74 6031.2 PI//1 4+00 6024.8 Pi 10+00 6009.8 PK\ 11+60 6001.8 6140 — RETENTION BASIN 6040 - 6030 - 6020 - 6010 6000 F - w ELEVATION NOTES: REFERENCE DRAWINGS: RFL - DS -10- 0719, TEMPORARY SITE DRAINAGE AND CONSTRUCTION FACILITIES PLAN TEMPORARY SITE DRAINAGE RETENTION BASIN SECTION AND DETAILS I I 5990 12+00 14+00 16+00 18+00 20+00 22+00 RFL - DS - 10 - 0720, PROFILE OF COLLECTION DITCH IRFL-D5- 10-07191 5:0069 / v STO019 EXISTING GROUND SURFACE 20 0 20 40 VERTICAL FEET 100 0 100 200 HORIZONTAL FEET 6260 1 - to w w 6240 u- 6220 0 6200 .4 w J w 0+00 2+00 4+00 6+00 STATION 8+00 IMPERMEABLE MEMBRANE LINER COMPACTED FILL 0 10+00 PROFILE OF TEMPORARY INTERCEPTOR DITCH I RFL -DS -10 -0719 1 q. 9'- 0 2' 3' 10'-0 TYP. COLLECTION DITCH SECTION IN FILL NOT TO SCALE 2 COMPACTED FILL 12+00 TYP. SECTION EXISTING GROUND SURFACE VARIES WITH DITCH DEPTH L 2.5 3'-0 (MIN/ 2.5 6180 TYPICAL INTERCEPTOR DITCH SECTION NOT TO SCALE 14+00 EXISTING GROUND SURFACE CONSTRUCT BERM AS NECESSARY TO MAINTAIN MINIMUM DITCH DEPTH PREPARED EXISTING 6ROUND SURFACE IMPERMEABLE MEMBRANE LINER �z 5 VARIES 1 WITH DITCH DEPTH ti TYP. COLLECTION DITCH SECTION IN CUT NOT TO SCALE LEGEND: EXHIBIT 4-K U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO DESIGNE7 $. y - DRAWN AMC cRECKf0 FOR INFORMATION ONLY ]NSPEc:ED ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE II CONSTRUCTION TEMPORARY SITE DRAINAGE PROFILE AND SECTIONS APPROVED DATE DATE OA N0. DATE REVISIONS 01 ESD MDR. CHIEF ENO. c DOE APR MORRISON-KNUUSEN ENGINEERS, INC UMTRA PROJECT DE- AC04-834L18796 O 1,0. RFL- DS -10 - 0721 REV C E544 000 0. oI =I 8 O 0 N�8,634.941 EL:6264.10 E 54,353.213 P.C1159,754- . E53,734 - clo bis • 8x25 3x0019 EL638402 1159856498 t00- E53526656 i = ±00 E53,000-: LIMIT OF GRADING APPROXIMATE LIMITS OF TAILINGS -LIMIT OF RIPRAP - 1 14+00 DIKE �! 1 �� , 1%00 . �. COORDINATES FOR EMBANKMENT AND GRADING LIMITS (SEE NOTE 2 POINTS COORDINATES NORTH EAST A 59590 53524 B 59523 53450 C 59470 53390 D 59660 53275 E 59395 53303 F 59595 53135 G 59310 53218 H 59568 52860 1 59195 53225 J 59310 52940 K 59465 52725 L 59000 53250 ' M 59161 52820 N 59340 52570 P 58810 53200 0 59030 52611 R 59152 52450 S 58691 53160 T 58908 52388 U 58950 52335 V 57660 53560 W 57570 53590 X 57470 53680 Y 57780 53430 Z 57320 53480 Al 53605 56930 81 57125 53350 C1 57300 51535 D1 56860 53530 EI 57220 51510 F1 57420 51600 APPROXIMATE LIMIT OFrTAILINGS 8+00 TOE DITCH \-11592°840• 78 EL.6208.5 ...\ 8 - 1 \ . •_ �\' C J `• rFOR INFORMATION ONLY e0 — fHM AMC c S:.ED 1E NOTES: I. DIKE FOR TOE DITCH TO BE CONSTRUCTED AS NECESSARY TO MAINTAIN MINIMUM DITCH DEPTH ( SEE TABLE 1,OWG. N0. RFL -09-10-07261, 2. COORDINATE POINTS AND BEARINGS ARE APPROXIMATE ONLY AND MAY BE ADJUSTED IN THE FIELD. REFERENCE DRAWINGS: RFL - D5 - 10- 0723, TAILINGS EMBANKMENT SECTIONS RFL - DS - 10 - 0724, TAILINGS EMBANKMENT DETAILS RFL -DS-10-0725, PERMANENT SITE DRAINAGE INTERCEPTOR DITCH PROFILES AND CROSS SECTION RFL - DS -10-0726, PERMANENT SITE DRAINAGE TOE DITCH PROFILE AND 'SECTIONS LEGEND: N 59,266 E 52,886 AI4 CONTROL POINT EXISTING SITE FEATURES AND CONTOURS (1982 SURVEY) CONSTRUCTION GRID COOROINATES —6090— APPROXIMATE FINISHED GRADE CONTOUR APPROXIMATE LIMIT OF TAILINGS Y Y EXCAVATION EMBANKMENT EXHIBIT 4-L 200 0 SCALE 200 400 FEET U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO ECOMMENDED 4PfP0VED DATE ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE 11 CONSTRUCTION FINAL SITE GRADING AND DRAINAGE PLAN 00E PROJECT FTA'NEER DATE QA NO. DATE REVISIONS Rr Cx Neo CHIEF TAC R ENG EV DOE • MORRISON.KNUDSEN ENGINEERS, INC UMTRA PROJECT PROJECT No. DE- AC04-83AL18796 oRAxnm N0 .00 RFL -DS -10-0722 C 6250 6200 F- 6150 LL z 6100 0 c w w 6050 6000 6450 640 1- w LL 6350 z 0 6300 w w ELEVATION - FEET 6250 6200 LIMIT OF RIPRAP TYPE A FINAL GRADING SURFACE EXISTING GROUND SURFACE EXCAVATED FOUNDATION SURFACE S 0065 NEW RIFLE TAILING AND ALL OLD RIFLE (CONTAMINATED MATERIAL DETAIL (10-0 MATCH LIMIT OF RIPRAP TYPE 8 5 RIPRAP TYPE BOLO THICK 1 AND DRAIN LAYER (6" THICK) TYPE DI 24+00 rt INTERCEPTOR DITCH (SEE RFL -DS -I0-07251 22-1-00 20+00 LIMIT OF RIPRAP TYPE A FINAL GRADING SURFACE 18+00 RIPRAP TYPE A (I'-0 THICKI AND DRAIN LAYER TYPE DI (6"THICK) EXISTING GROUND SURFACE 6200- 6150 6,00 6050 6000 COMPACTED FILL (TYP) 36+00 34+00 32+00 30+00 CROSS - SECT ION DETAIL 0]2a 28+00 DETAIL 26+00 16+00 29+00 14+00 12+00 CROSS-SECTION 10+00 8+00 cRIPRAP TYPE A 0'-0 THICK) —F—DRAIN LAYER TYPE DI (6" THICKI FROST BARRIER (3'-0 THICK) DRAIN LAYER TYPE D2 (6" THICK) RADON/INFILTRATION BARRIER (3'-0 THICK, SEE NOTE I) —BENTONITE AMENDED LAYER 5 SCALE 0 5 10 FEET DETAIL 1 0]29 EXISTING GROUND SURFACE 5=0.01 TAILINGS PILE MATERIALS 0r00 2+00 4+00 6+00 8+00 CROSS-SECTION 10+00 I2+00 14+00 I6+00 18+00 20+00 2 +00 6+00 4+00 NOTE: 2+00 CE TOE DITCH (SEE RFL -DS -I0-0726) I +67 0 00 RADON/INFILTRATION BARRIER THICKNESS MAY BE ADJUSTED DURING FINAL CONSTRUCTION. THE TOP ILO OF THIS BARRIER 15 TO 8E AMENDED WITH BENTONITE. REFERENCE DRAWINGS: RFL -DS -10-0722, FINAL SITE GRADING AND DRAINAGE PLAN RFL- DS - 10- 0724, TAILINGS EMBANKMENT DETAILS RFL -05-10-0725, PERMANENT SITE DRAINAGE -INTERCEPTOR DITCH PROFILE ANO SECTIONS RFL -DS -10-0726, PERMANENT SITE DRAINAGE- TOE DITCH PROFILE AND SECTIONS EXHIBIT 4—M 50 0 O — VERTICAL SCALE 50 100 FEET 100 0 100 200 P"4•11eci- HORIZONTAL SCALE FEET U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO DESIGNED SO CHECKED cJ8- 1 FOR INFORMATION ONLY INSPECT ss� .E APF XO VED / ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE II CONSTRUCTION TAILINGS EMBANKMENT SECTIONS On RDJECT DATE DAT ONS BY cN DD CHIEF EKG. TA RE DoE APP. MORRISON-KNUDSEN ENGINEERS, INC. UMTRA PROJECT iso NowAAD ST Sky FRAP•osco CA mos PROJECT N0. DE- AC04-83AL18796 ORA'NIXG X0. RFL- DS -10-0723 RIPRAP TYPE A (12" THICK) DRAIN LAYERS (E." THICK) EXISTING GROUND SURFACE 5=0.01 •• ). 1L2 ... • RADON/INFILTRATION BARRIER -1s (CONTAMINATED MATERIAL? O NATURAL DRAINAGE 5L0 •::..:•� 15-0 BENTONITE AMENDED LAYER PREPARED FOUNDATION TYPICAL APRON IN CUT AREAS (EAST SIDE OF EMBANKMENT BELOW FINAL GRADING ELEVATION 6240) DETAIL 1 NOT TO SCALE RIPRAP TYPE B (12" THICK) DRAIN LAYERS(6" THICK) EXISTING GROUND SURFACE c_ TOE DITCH (SEE DWG.NO. RFL -DS -10-0722) 5'-0 SLOPE TO DRAINt�� 5 PREPARED FOUNDATION BENTONITE AMENDED LAYER RIPRAP TYPEA (- EXISTING GROUND SURFACE 4-0 L SOUTH TOE OF EMBANKMENT TYP. DETAIL NOT TO SCALE —RIPRAP TYPE A (12" THICK) ITYPE (6"THICK ) DDI COMPACTED FILL 2 ( WHERE REOUIRED) TYPICAL APRON IN FILL AREAS ( EAST AND WEST SIDES OF EMBANKMENT BELOW FINAL GRADING ELEVATION 6240) DETAIL 3 PREPARED FOUNDATION NOT TO SCALE RADON/INFILTRATION BARRIER—.y Ats_CONTAMINATEO MATERIAL ELEVATION FEET 6265 - 6260 6255 6250 6245 RIPRAP TYPE A (12" THICK) DRAIN LAYER (6" THICK) TYPE DI EXISTING GROUND SURFACE DETAIL (TY P) 0 200 400 DISTANCE - FEET CROSS SECTION 5 0 5 10 ^. LSCALE SCALE FEET 100 0 100 200 H-I--,� HORIZONTAL SCALE FEET RIPRAP TYPE A 112" THICK) DRAIN LAYER (6" THICK TYPE DI EXISTING GROUND SURFACE 5-0 JI 2(TYP) 600 TYPICAL APRON ( NORTH SIDE OF EMBANKMENT ABOVE ELEVATION 6240 ) DETAIL %A1 DRAIN LAYER (6" THICK) TYPE 02 BENTONITE AMENDED LAYER (ILO THICK) NOT TO SCALE Boo NOTES: REFERENCE DRAWINGS: RFL - DS - 10 -0722, FINAL SITE GRADING AND DRAINAGE PLAN RFL - DS - 10 -0723, TAILINGS EMBANKMENT SECTIONS EXHIBIT 4-41 U. S. DEPARTMENT OF ENERGY ALBUOUEROUE, NEW MEXICO FOR INFORMATION ONLY I DESIGNED RANN ESTES GULCH DISPOSAL SITE g/.'j..✓„ RBCJAMC RIFLE, COLORADO chLDKET 7. PHASE II CONSTRUCTION rE6, TAILINGS EMBANKMENT DETAILS F�DMME -y L APPROVED / • DATE 1DOE PROJECT ENGINEER DATE I MKAE NO. DATE R E VISIONS 9Y CK MORRISON-KNUDSEN ENGINEERS, INC UMTRA PROJECT EBD CMIEE TAG DOE W0110W590 STS0S l9.CI:CO. 49.105 MGR. E.V'u. REV. APP. PRD,EL*DE- AC04-83AL18796 5 FIANIN0 N0. 0CV RFL -DS -IO -0724 C 6500 - ▪ 6460 - w ELEVATION 6420 - 6380 6340 6300 6260 (STATIONS) EXISTING GROUND SURFACE 5. PI API DITCH INVERT (SEE NOTE 1) -6500 -6960 -6420 - 6380 - 6390 - 6300 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3 +50 4+00 4+50 5+00 5+50 6+00 PROFILE -PERMANENT INTERCEPTOR DITCH 1 AT ESTES GULCH (SEE TABLE I ) 40 0 40 80 SCALE FEET CL INTERCEPTOR DITCH DITCH INVERT EXISTING GROUND SURFACE TYPICAL CUT SECTION NOT TO SCALE. TABLE I DITCH CONTROL POINTS STATION ELEVATION /"\ 5 + 50 6424.0 FIp 5+00 6399.0 1 PIA\ 0 T 65 6315.2 A 0+20 6290.2 6260 ELEVATION NOTE: I. NO EROSION PROTECTION NEEDED FOR THIS DITCH. NOTES: REFERENCE DRAWINGS: RFL -DS -10-0722, FINAL SITE GRADING AND DRAINAGE PLAN EXHIBIT 4-0 U. S. DEPARTMENT OF ENERGY ALBUQUERQUE, NEW MEXICO [fx2ea ICCR/W50 LFOR INFORMATION ONLY ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE II CONSTRUCTION PERMANENT SITE DRAINAGE v`s w LINTERCEPTOR DITCH PROFILE 81 SECTIONS DOE PROJECT ENGINEER DATE 0 DATE REVISIONS MORRISON.XNUDSEN ENGINEERS, INC UMTRA PROJECT Ry CR ESD CHIEF TAC 00! uoxaAAN0 ST sAFRAKISCO. Gnus MGR. ENO. EV. APIA PROJECT N0. DE- ACO4-83AL18796 DRAWING N0. RFT RFL -DS -IO -0725 C 6050 - 6040 - 6030 w u- 6020 - 6010 - 0 a > 6000 - -J 5990 - 5980 5970 2 1 EXISTING GROUND SURFACE ti i DITCH INVERT �— A ESTIMATED BEDROCK SURFACE /ISEE NOTE 1 1 , ? /n.. pVc 11 6050 6040 6030 -6020 LL -6010 - 6000 - 5990 0+00 2+00 EXISTING GROUND SURFACE 9+00 6+00 8+00 DITCH INVERT 10+00 6" DRAINAGE MATERIAL, D1 0 RIPRAP TYPE B 20'-0 TYPICAL CUT SECTION NOT TO SCALE 20' 0 12+00 14+00 STATION 5 16+00 PROFILE - PERMANENT TOE DITCH AT ESTES GULCH 0 0 10 20 _ m {_ VERTICAL SCALE FEET 100 0 100 200 e �e HORIZONTAL SCALE FEET SEE NOTE 2 18+00 20+00 22+00 FOR RIPRAP TYPE AND LAYER THICKNESS, SEE DWG. NO. RFL -DS -10-0724 EXISTING GROUND SURFACE 15'-0 DITCH OUTLET TYPICAL SECTION NOT TO SCALE -0 SEE NOTE 2 5980 5970 24+00 ELEVATION TABLE I CONTROL POINTS STATION ELEVATION /^\ 0+47 5999.2 NA /n 22+00 6010.0 CQ\ 22+70 6024.0 NOTES: 1. ESTIMATED BEDROCK SURFACE SHOWN I5 THE TOP OF ROCK AND I5 TAKEN FROM BEDROCK CONTOURS PREPARED FROM INFORMATION OBTAINED FROM BOREHOLES AND TEST PITS LOCATED IN THE GENERAL VICINITY OF THE TOE DITCH. - 2. RIPRAP, DRAINAGE LAYER AND KEY TRENCH MAY NOT BE REQUIRED FOR SOME PORTIONS OF THE DITCH LOCATED WITHIN SOUND BEDROCK. THIS WILL BE DETERMINED DURING CONSTRUCTION. REFERENCE DRAWINGS: 10.-0 RFL -DS -I0-0724 TAILINGS EMBANKMENT DETAILS EXISTING GROUND SURFACE DITCH INVERT RIPRAP TYPE B 5 5 160 -0 DITCH OUTLET TYPICAL PLAN NOT TO SCALE COMPACTED FILL TYPICAL CUT AND FILL SECTION NOT TO SCALE EXHIBIT 4-P U. S. DEPARTMENT OF ENERGY ALBUOUEROUE, NEW MEXICO CO 4,7 0/AML 0 cHECKBG %JT Y DSP ECT E9 L FOR INFORMATION ONLY APPROVED 4- ESTES GULCH DISPOSAL SITE RIFLE, COLORADO PHASE LI CONSTRUCTION PERMANENT SITE DRAINAGE TOE DITCH PROFILE AND SECTIONS DATE DOE PROJECT ENGINEER DATE OP 45-5 NO. I OATE fl E 5111005 BY CK EBD MGR. C10E5 AC APE MORRISON-KNUDSEN ENGINEERS, INC UMTRA PROJECT NG NOWAXO �, RMJ EAyC,1CG.G.2505 PROJECT N0. DE-AC04-834L18796 oflaxwN x RFL- DS -10-0726 REV C 5.0 OPERATIONAL DATA 5.1 Contractor's Representative The Contractor's site manager with overall responsibility for operation of the Rifle UMTRA Project is: Randy Withee, Site Manager MK -Ferguson Company P.O. Box 151 24230 Highways 6 at 24 Rifle, Colorado 81650 (303) 625-4618 5.2 U.S. Department of Energy Representative The representative of the U.S. Department of Energy with responsibility for overview of the Rifle UMTRA Project is: Clint Smythe U.S. Department of Energy UMTRA Project Operations Office 5301 Central Avenue, Suite 1700 Albuquerque, New Mexico 87108 (505) 845-5638 5.3 Hours of Operation The total number of hours of daily operation has yet to be determined. This will depend on the capacity of trucks authorization for use in the tailings haul. Operations at the processing sites will last a total of 10 hours per day, six days per week. At the Estes Gulch disposal site it is anticipated that operations will proceed 24 hours per day, seven days per week. CERTIFICATE (S5).RFL 5 - 1 3885 -RFL -G-01-03601-00 5.4 Types and Volumes of Waste The total amount of contaminated materials at the Old Rifle site, including contaminated soils beneath the tailings is estimated to b approximately 661,000 cubic yards. Total volume of contaminated materials at New Rifle is 3,474,000 cubic yards. 5.5 Impacts on Transportation Maximum impacts on area highways were determined to occur on State Highway 13, north of the junction with the Rifle bypass. Remedial action activities would result in maximum daily increase in traffic of 68 percent (see Exhibit 5-A). This increase would occur over a 17 -month period of time when all tailings, other contaminated materials, and all erosion protection materials would be transported to the Estes Gulch site. To mitigate transportation impacts to State Highway 13, improvements will include construction of a paved 12 -foot -wide, 7500 -foot -long climbing lane on the east side of State Highway 13 between Highway 325 and Estes Gulch site turnoff; and 800 -foot -long, 12 -foot -wide truck turnout; an intersection improvement at the Railroad Avenue and Highway 13 Bypass intersection; and intersection widening on Highway 13 at the Estes Gulch turnoff. For further discussion, see EIS, Section 5.13. CERTIFICATE (S5).RFL 5 - 2 3885 -RFL -G-01-03601-00 EXHIBIT 5-A ESTIMATED INCREASES IN AVERAGE DAILY TRAFFIC DISPOSAL AT THE ESTES GULCH SITE Highway Location Remedial Action Daily 1984 Average Traffic Daily Traffic (vehicles per dav) (vehicles per dav) Minimum Average Maximum North end of the Rifle Bypass (State Hwy 13) 1550 State Highway 13 -State Highway 325 Junction 2700 I-70 at the Western Glenwood Springs Interchange 67 1280 1105 67 801 1051 8850 9 9 9 An application has been filed with the Colorado Department of Highways (CDOH) for an access permit for the Estes Gulch turnoff. In addition, MK -Ferguson is working in close cooperation with CDOH to develop the haul lane along Highway 13, and to improve the intersection of Railroad Avenue with the Highway 13 Bypass, north of the city. The improvements will include additional left turn lanes, a new sidewalk, new pavement and reconstruction of curbs and gutters. The work will also include relocation of traffic lights to a new location on the reconstructed traffic island. Because the Highway 13 haul lane will be constructed within the right-of-way owned by the U.S. Department of the Interior Bureau of Land Management (BLM), the BLM requires publication of an Environmental Impact Statement before approval of construction can commence. The EIS was published in March 1990. A Record of Decision (ROD) is expected in the fall of 1990. The DOE, through MK - Ferguson, is cooperating with the BLM in compliance with NEPA requirements. CERTIFICATE (S5).RFL 5 - 3 3885 -RFL -G-01-03601-00 5.6 Eauioment Since the project has not yet been let to bid, the number of pieces of equipment has yet to be determined. The total number of units required is tentatively estimated to be 60. Equipment will include: o Pickups o End -dump truck (10 cy) o Tractor/Belly Dump Trucks o Backhoe - CAT 235 o Grader - CAT 12 o Loader - CAT 966 o Loader - CAT 988 o Loader - CAT 992 o Roller - CAT 825 o Scraper - CAT 623 o Scraper - CAT 631 o Scraper - CAT 633 o Dozer - CAT D6 o Dozer - CAT D9 o Paving Machine o Grant Plant o 50 -Ton Crane o 25 -Tone Crane o Water Wagons 5.7 Employment Construction Schedule The project will require an estimated 42 months to complete. Employment will reach a maximum of approximately 139 people in the sixteenth month of remedial action and would average approximately 104 people per month over the life of the remedial action. Employees will include operators for dump trucks, cranes, scrapers, dozers, backhoes, loaders, etc.; general laborers; plumbers and electricians; carpenters and fitters; supervisory personnel. Eighty percent of the workforce will be hired locally. CERTIFICATE (S5).RFL 5 - 4 3885 -RFL -G-01-03601-00 The estimated cost of $28,920,000 excludes the costs of property acquisition, engineering designs, overall project management, remedial action at the vicinity properties and long-term surveillance and maintenance. For additional information employment impacts, see EIS, Section 5.10. 5.8 Sewage Disposal During project construction activities, temporary sanitary facilities will be installed at both processing sites and the disposal site. Sanitary waste from toilets provided in the Contractor's trailers will be drained to temporary underground holding tanks. Chemical toilets will be located at remote location at Estes Gulch for field personnel. All sanitary waste will be disposed of off- site by the Subcontractor in accordance with local and state regulations. Washwater from personnel decontamination will be drained to the retention basins. 5.9 Excavation Dewatering and Stormwater Runoff Management 5.9.1 Old and New Rifle - Groundwater produced by excavation dewatering, and stormwater and snowmelt runoff from the processing site, will be routed to on-site retention basins. The retention basins will be lined with a geomembrane liner. Water in the retention basin will be treated in a project wastewater treatment plant and will be released to the Colorado River in accordance with the conditions of the Colorado Discharge Permit System. A permit application has been filed with the Colorado Department of Health. Water from the retention basins may also be used for vehicle decontamination and dust control on the tailings pile. Unless laboratory analyses indicate the water is uncontaminated, this water will not be used for dust control or soil compaction in areas where contaminated materials have been removed. 5.9.2 Estes Gulch - At the Estes Gulch disposal site runoff from the tailings embankment construction area will be collected in a retention basin. Water in the retention basin will be allowed to evaporate and will be made available as a supplemental source of vehicle washwater. The basin has been designed to retain the maximum accumulation of average monthly runoff plus the runoff from a 10 -year, 24-hour storm. Thus, a discharge from the disposal site retention basin is not expected to occur unless these design conditions are CERTIFICATE (S5).RFL 5 - 5 3885 -RFL -G-01-03601-00 exceeded. If a discharge is necessary, the retained water will be analyzed and treated as required. A CDPS permit application has been filed with the Colorado Department of Health. 5.10 Water Requirements Neither the processing sites nor the disposal site will require permanent sources of water. The processing sites will be converted to vacant land. Construction at the disposal site will produce a disposal embankment, a drainage ditch, a temporarily fenced boundary and groundwater monitor wells. During construction activities, non -potable construction water will be needed for vehicle decontamination (washing), dust control and for compaction of backfill. At Old and New Rifle construction water will be used primarily for tailings pile watering, vehicle decontamination and for dust control during the placement of uncontaminated backfill. At the Estes Gulch disposal site construction water will be used primarily for vehicle decontamination and for dust control during the excavation of the disposal embankment foundation, the retention basin and other construction facilities, and during the placement of fill for the tailings embankment and site grading. Estimated water consumption for all project operation is 284,262,000 gallons. 5.11 Fire Plans Fire prevention and protection is included in MK -F's Safety and Health Program. All construction personnel are required to comply with all provisions of the Safety and Health Program. Following are specific fire prevention and protection measures: o Prevention Measures - Fires and open flame devices will not be permitted around combustible materials. CERTIFICATE (S5).RFL 5 - 6 3885 -RFL -G-01-03601-00 - Smoking will be prohibited in locations where combustible materials are stored. No smoking signs will be posted in these areas. - Refueling of equipment while engine is running will be prohibited. - Flammable liquids will be stored in proper safety cans. - Portable atmospheric pressure fuel tanks on work sites must satisfy the requirements of the MK -F Safety and Health Program pertaining to tank construction, size, vents, outlet valves, nozzles, hoses, grounding and bonding. o Suppression Actions - Every project construction vehicle will contain a fire extinguisher. - A water truck will be available along the right-of-way during road construction. A water truck will be located at the disposal site during the tailings haul. - Appropriate fire extinguishers will be placed near fuel storage tanks. o Communications/Notifications - Two-way radios will be placed in supervisors' vehicles. - Telephone service or two-way radio communications will be available at the disposal site. - Emergency telephone numbers will be posted at the disposal site office trailers. Fires will be reported to the City of Rifle Fire Department and to the BLM. CERTIFICATE (S5).RFL 5 - 7 3885 -RFL -G-01-03601-00 6.0 CLOSURE DATA The remedial action at Rifle must demonstrate compliance with the EPA closure performed standards of (40 CFR 192.02 (a)(4), and, thus, the prime objective of licensing is to assure continued compliance with the EPA standards via a post - remedial -action surveillance and maintenance program. 6.1 Initial Maintenance The DOE will conduct the surveillance and maintenance pursuant to the requirements of the NRC's license until termination of the UMTRA Project (i.e., March 7, 1994). At that time, the DOE, or another agency to be designated by the President, will maintain the site as required by the NRC. Active maintenance of the disposal cell will be minimized because it will be constructed with durable, natural materials that will meet the longevity requirements of 40 CFR 192.02. Other safety factors have been incorporated in the disposal cell design so that cell should operate for longer than the required 1000 -year design life. For example, the pile has been designed to accommodate natural forces such as erosion and frost heave. 6.2 Long -Term Maintenance A detailed custodial surveillance and maintenance program will be defined jointly by the DOE and the NRC during the NRC license application and approval process. This program may include any or all of the following activities. 6.2.1 Site Inspections - Site inspection would constitute a visual and definitive verification that the disposal site continues to function as designed and would assure continued compliance with the design standards. 6.2.2 Aerial Photographs - Aerial photographs might be used to supplement site inspections. CERTIFICATE (S6).RFL 6 - 1 3885 -RFL -G-01-03601-00 6.2.3 Groundwater Monitoring - A sampling and monitoring plan will be developed to address the various monitoring needs of the disposal cell, including groundwater monitoring, biointrusion, soil erosion, and runoff from the pile. The data collected will be used to evaluate the performance of the disposal cell. 6.2.4 Reaortinq - Summary surveillance and monitoring reports that evaluate the results of these activities and recommend custodial maintenance (i.e., corrective actions) and future surveillance and monitoring would be prepared. Reports and supporting documentation would be placed on file with the DOE, NRC, State of Colorado, and Garfield County. 6.3 Custodial Maintenance The need for custodial maintenance (i.e., corrective action) could only be determined by the site inspections and monitoring and by NRC and DOE evaluation of the reports of these activities. However, it is anticipated that custodial maintenance would consist primarily of the following: o Limited earth/rock replacement because of unanticipated erosion, human or animal intrusion, or cover disturbance. These activities are expected to be required infrequently. o Control of deep-rooted plants by infrequent application of herbicides or physical removal as required. o Mechanical repairs to the access barrier and warning signs, when necessary. 6.4 Contingency Plans In case of severe natural events (e.g., extreme rainfall or seismic events) or unusual human intrusion, procedures would be developed to initiate inspection and to institute custodial maintenance of the disposal site. CERTIFICATE (S6).RFL 6 - 2 3885 -RFL -G-01-03601-00 PRESENTATION TO GARFIELD COUNTY PLANNING COMMISSION CONDITIONAL USE PERMIT APPLICATION AND CERTIFICATE OF DESIGNATION APPLICATION JANUARY 9, 1991 p ACOS • CONTENTS SECTION 1 INTRODUCTION 2 LOCATION 3 DESCRIPTION OF SITES 4 ADJACENT PROPERTIES 5 DISPOSAL CELL 6 TRANSPORTATION OF TAILINGS 7 HIGHWAY 13 IMPROVEMENT 8 TRUCK TRAFFIC 9 EMPLOYMENT 10 EQUIPMENT 11 HAUL SCHEDULE 12 SANITATION FACILITIES 13 LAND USE 14 NOISE 15 SURFACE WATER 16 GROUNDWATER 17 PROTECTION OF WILDLIFE 18 RECLAMATION 19 SECURITY BOND 20 INDUSTRIAL PERFORMANCE STANDARDS 1. INTRODUCTION o MK-FERGUSON COMPANY IS THE REMEDIAL ACTION CONTRACTOR FOR THE UMTRA PROJECT o MK-FERGUSON COMPANY IS MAKING THIS APPLICATION FOR A CONDITIONAL USE PERMIT ON BEHALF OF THE DOE o FORMER UNION CARBIDE SITES AT RIFLE, COLORADO o CLEAN UP MANDATED BY THE URANIUM MILL TAILINGS RADIATION CONTROL ACT OF 1978 (PUBLIC LAW 95-604) o FUNDING 90/10 SPLIT, USDOE/CDH o RELOCATE BY TRUCK ON HIGHWAY 13 URANIUM AND VANADIUM MILL TAILINGS, DEBRIS AND OTHER CONTAMINANTS ASOCIATED WITH THE MILLING OPERATION TO THE ESTES DISPOSAL SITE. 2. LOCATION o TWO TAILINGS SITES AT RIFLE, COLORADO - OLD RIFLE SITE, EAST OF TOWN - NEW RIFLE SITE, WEST OF TOWN o PROPOSED ESTES DISPOSAL SITE - APPROXIMATELY 6 MILES NORTH OF RIFLE 1: 0 0 Go 1 m ESTES GULCH SITE RIO BLANCOJ GARFIELD GARFIELD MESA Fruits Dania Orchard Masa Grand Junction 1/N 0 oe M••k•r 13 789 RIFLE wNITE I I - J olW OTE -NTN -(5-0D SPRINGS LLI< „BORROW SITE �jW 1 • RIVER Now 01114 .,�� ;; flit • ■ � TAILINGS SITE Carbondale T— • GRAND • /NATIONAL L- LUCAS MESA SITE GI•nwoodl Springs I ® Roarinp Our m MESA r NATIONAL Iz $r/ -JI0 tfr,St. oIZ z FOREST C•daredgo Ica., I0 cD 133 Pet FOREST DENVER w COLORADO APPROXIMATE LOCATION OF MAP 10 0 10 20 3D EXHIBIT A-1 SCALE IN MILES • Vo0-0 • • • 1.000 `"0 1000 3000 SCALE IN FEET LEGEND —'— --POWER TRANSMISSION LINE DIRT ROAD L.560 REF: MODIFIED FROM THE RIFLE 7.6 MIN. USGS QUAD. EXHIBIT A-5 3. DESCRIPTION OF SITES o OLD RIFLE SITE - THE 22 ACRE OLD RIFLE TAILINGS SITE CONSISTS OF A 13 ACRE TAILINGS PILE AND A 9 ACRE MILL AREA. FIFTY-THREE ACRES ADJACENT TO THE TAILINGS SITE ARE CONTAMINATED WITH WINDBLOWN TAILINGS AND DEBRIS. NEW RIFLE SITE - THE NEW RIFLE TAILINGS SITE OCCUPIES 142 ACRES. THE TAILINGS PILE COVERS 33 ACRES AND THE MILL AREA COVERS 59 ACRES. THE ENTIRE NEW RIFLE SITE IS CONTAMINATED, AND A 63 -ACRE AREA ADJACENT TO THE TAILINGS SITE HAS BEEN CONTAMINATED WITH WINDBLOWN TAILINGS. DESCRIPTION OF SITES, CONTINUED o ESTES GULCH THE DISPOSAL SITE AT ESTES GULCH IS LOCATED IN TOWNSHIP 5 SOUTH, RANGE 93 WEST, SECTION 14, APPROXIMATELY 6 MILES NORTH OF RIFLE. THE SITE IS BETWEEN THE GRAND HOGBACK TO THE NORTHEAST AND STATE HIGHWAY 13 TO THE SOUTHWEST ON FEDERAL LAND ADMINISTERED BY THE U.S. BUREAU OF LAND MANAGEMENT (BLM). THE U.S. DEPARTMENT OF ENERGY HAS APPLIED TO THE BLM FOR THE WITHDRAWAL OF 440 ACRES FOR THE UMTRA DISPOSAL SITE. THE DISPOSAL SITE IS ALSO THE LOCATION OF BORROW MATERIAL. P • ---"t;r:------jegrX 9206HTANINATCR d • C;(4-; vpisComperrarrya aral-5.t CONCRIT ACCESS - TO RIFLE _ - ( ACCESS CONTROL 5 STAGiNCI AREA .-3?FT WIDE 000 ---TRANSFORMER "\\ ,••• JA•1 IPLAST RUNE r! • IS , -1"El DITCH • , ' ; ositCr,._/ II! Ft • si I 1.) ‘1 WASTEWATERcr, J.( ; r ! I RETENTION SA 4- \ A% \\.31" ••44„ irc, • - • 2. -. ISOOMJ0V) • -•:.- . . fi \ : r Fm8655‘, . 1 I 6 58 6 - rr Y4Arrnirif _RETENTION -BMW _ . . ir, c. „. fl GIIWAY 10 '*UT erao-- — L 3.0t7z= ;1.11 r.aie"TFRRI7 - --' • - oct—firi --- it il , MAIIEWATsAi 7-n I_ 4 I $)i/ I .. I CI -IFn 1- ' in' ,, c‘, _1 ,PLIArliN NpADT i" Itl-- --..;.."1-:6-tr ': ' • nE" . ._ ,. ,._ ., ,_.___ ., --- • .% C•3.)k. ::-/ ' 4 O., - ''..V. }LV::: / 44 INLEI T.--r-----el r';:......:( , \ ern. 11:111 ''...--. .r“-..:;71•., • .--..2 ;‘-• ° •--„,.."-"-.1";:in- IL 5/0Z:9316E1 NOTE 1 I --! c ' • 460 1 . r ' r u 4. HI4HWAY IQ Eat pOUNO :per •••• COLORADO RIVER 311'11 CSP (APPROXIMATE LOCATION OHM 4. ADJACENT PROPERTIES 0 OLD RIFLE SITE - COUNTY ASSESSOR'S MAPS 2177-161 AND 2177-15 INDICATE THE FOLLOWING: *LOT 023 UMETCO *LOT 013 UMETCO LOT 022 STATE OF COLORADO *LOT 016 CITY OF RIFLE LOT 014 CANYON CABLE TV *VICINITY PROPERTY 4. ADJACENT PROPERTIES, CONTINUED 0 NEW RIFLE SITE - COUNTY ASSESSOR'S MAP 2177 INDICATE THE FOLLOWING: LOT 954 BLM *LOT 108 UMETCO LOT 129 FRANCESCA REAL ESTATE CORP., HOUSTON, TEXAS LOT 276 CLYDE DECHERT/NICHOLAS GLUBLA JR., GLENWOOD SPRINGS, COLORADO *VICINITY PROPERTY ADJACENT PROPERTIES, CONTINUED o ESTES DISPOSAL SITE - COMPLETELY SURROUNDED BY BLM LANDS - PERMANENT EASEMENT THROUGH LOT 018, MAP 2129, UNDER NEGOTIATION WITH MR. SAM POTTER OF RIFLE, COLORADO 5. DISPOSAL CELL o COMPLETED CELL WILL COVER APPROXIMATELY 85 ACRES o PARTIALLY BELOW EXISTING GROUND SURFACE U v 4 <1 V.V 111111111011 1 i 1 �tl 1 <71 0 i 1 6. TRANSPORTATION OF TAILINGS o USE U . HIGHWAY 6 AND STATE HIGHWAY 13 o ALL TRUCKS ROUTED ONTO HIGHWAY 13 BYPASS o NO DEVIATION FROM PRE -ESTABLISHED HAUL ROUTE o ALL TRUCKS ARE TARPED OR SPRAYED WITH SURFACTANT o ALL LOADS AT OR BELOW G.V.W. FOR IT'S CONFIGURATION o PERIODIC SAFETY INSPECTION OF TRUCKS PERFORMED JOINTLY BY CONTRACTOR AND SUBCONTRACTOR o TIME INTERVAL BETWEEN TRUCKS IS FUNCTION OF DECONTAMINATION TIME, NORMALLY 3 MINUTES 7. HIGHWAY 13 IMPROVEMENTS o CONSTRUCTION OF PAVED CLIMBING LANE o TRUCK TURN OUT o IMPROVEMENTS TO INTERSECTION AT RAILROAD AVENUE AND HIGHWAY 13 BYPASS o POST REMEDIATION IMPROVEMENTS UNDER NEGOTIATION BETWEEN CDOH AND U.S. DOE D 7 iI 10. EQUIPMENT o MILL SITE WATER TRUCKS 2 FRONT END LOADERS 2 GRADER 1 FUEL TRUCK 1 MECHANIC TRUCK 1 DOZER 1 BACKHOE 1 LIGHT PLANTS 5 10. EQUIPMENT, CONTINUED o DISPOSAL SITE WATER TRUCKS 2 COMPACTOR 2 GRADER 1 DOZER 1 FUEL TRUCK 1 LIGHT PLANTS 5 MECHANIC TRUCK 1 SCRAPERS 6 - PART TIME DOZER 1 - PART TIME GRADER 1 - PART TIME 10. EQUIPMENT, CONTINUED 0 TAILINGS HAUL BELLY DUMP TRUCKS 20+ MECHANIC TRUCKS 2 FUEL TRUCK 1 FUEL TANKER 1 - PART TIME 11. HAUL SCHEDULE o TO BE DETERMINED BY SUBCONTRACTOR AND CONCURRED BY MK-FERGUSON COMPANY WITHIN LIMITATIONS OF CONDITIONAL USE PERMIT 11. HAUL SCHEDULE, CONTINUED o POSSIBLE SHIFTS PER WEEK - 24 HOURS PER DAY, 7 DAYS PER WEEK 4 CREWS PER WEEK, EACH WORKING 3 1/2, 12 HOUR DAYS = 42 HRS/WEEK - 12 HOURS PER DAY, 7 DAYS PER WEEK 2 CREWS PER WEEK, EACH WORKING 3 1/2, 12 HOUR DAYS = 42 HRS/WEEK - 21 HOURS PER DAY, 6 DAYS PER WEEK 3 CREWS PER WEEK (DAY, SWING & GRAVEYARD), EACH WORKING 6, 7 HOUR DAYS = 42 HRS/WEEK 12. SANITATION FACILITIES o EQUIPMENT AND PERSONNEL DECONTAMINATION FACILITIES o PORTABLE TOILETS o POSSIBLE SPLIT ON GREY WATER FOR OFFICE TRAILER HOLD TANKS 13. LAND USE 0 RIFLE SITES - PROPERTY OF STATE OF COLORADO 0 ESTES DISPOSAL SITE - BLM TO DOE LAND TRANSFER. LOSS OF GRAZING 85 ACRES. 14. NOISE 0 LEVELS WILL NOT EXCEED STANDARD 0 MONITORING PROGRAM CURRENTLY IN PLACE ON UMTRA PROJECT, ON AND OFF SITE FOR WORKER AND PUBLIC EXPOSURE 15. SURFACE WATER o OLD RIFLE - WITHIN 100 -YEAR FLOODPLAIN o NEW RIFLE - WITHIN 100 -YEAR FLOODPLAIN o ESTES DISPOSAL SITE - 0.5 MILES FROM AND 150 FEET ABOVE NEAREST CREEK - PMP IS 7.4 INCHES IN ONE HOUR - INTERCEPTOR DITCH ABOVE CELL WILL DIVERT AT COMPLETION -101- 1 W O J CO J Ill < z Q c' z O• cc O m ¢ z ci • EC > f- = O z W i n W z w ° N 7 z ¢ w ¢ O > > ON ¢ F- z z o. 7 Oct ¢ eta D 7 n. O Z , 8 Ill o 0 n o) .- O W c•co O , J " o w 1— w J W_ cc 0 J 0 w a 0 z 0 cc ti e} w O > O • -1 _ LL z z 0 p, 1-- z w 0 z 0 0 2 z a cc -120- WJ a6 W I 7 Z QJ t ¢ NI - O U W O � ¢ OLA m Q Z [L— _ W J :EC- x W U 7 Z - Z i ZW W W JJ Z a W a WO O WW 7 U N 0 Z ¢i : NQ O7 J O ¢ O z = a� Oa ¢z ¢ ¢O 2D > o a u. • 4. U 4, :4- 4- WASATCH ' ESTES GULCH SITE WASATCH FORMATION WASATCH FORMATION • • OLD RIFLE SITE NEW RIFLE SITE • • GRASS MESA TAUGHENBAUGH MESA 1/2 0 1/2 SCALE IN MILES • • • • LEGEND 2 • - WELL LOCATION AND NUMBER OF WELLS AT ONE LOCATION VSR- MUNICIPAL WELL FOR THE VILLAGE OF SOUTH RIFLE ALLUVIUM ivySUDDEN CHANGE IN SLOPE (DOWNWARD) FIGURE E.2.31 EXISTING WELLS WITHIN A TWO-MILE RADIUS OF THE OLD RIFLE, NEW RIFLE, AND ESTES GULCH SITES E-232 17. PROTECTION OF WILDLIFE o GENERAL - FENCING OF DISPOSAL SITE - POSSIBLE FENCING OF ACCESS ROAD TO DISPOSAL SITE o MULE DEER - POSSIBLE INCREASE IN DEATH RATE DUE TO INCREASED TRAFFIC AND OCCUPATION OF ESTES SITE o BIG HORN SHEEP - POSSIBLE EFFECTS FROM NOISE 18. RECLAMATION o PROCESSING SITES - BACKFILLED GRADED FOR POSITIVE DRAINAGE - REVEGETATED - WETLANDS RESTORED OR ENHANCED o ESTES DISPOSAL SITE - DISTURBED AREAS BACKFILLED AND REVEGETATED SECTION 02935 SEEDING PART 1 - GENERAL 1.1 SCOPE A. This Specification Section covers seeding for the restora- tion of the following areas: 1. Old Rifle Processing Site and Access Road Turnout 2. New Rifle Processing Site including Wet Meadow/Shrub Wetlands 3. Estes Gulch Disposal Site: Retention Basin, Access Control and Staging Area, and Access Road Turnout at Highway 13 4. Disturbed areas and earth materials stockpiles left inactive for 6 months or longer shall be seeded but not mulched. 1.2 WORK NOT INCLUDED Seeding related to the restoration of off-site construc- tion facilities including borrow areas is not included in the Scope of Work of this Section. 1.3 RELATED WORK Section 02936 - Wetlands Revegetation 1.4 MATERIAL STORAGE A. Seeds shall be stored in sealed waterproof containers in a cool, dry location and shall be kept out of direct sun- light until ready for use. B. Fertilizer, if required, shall be delivered and stored in waterproof containers which will show the chemical analy- sis and name of manufacturer. RFL -PH -II Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 02935 - 1 70125 091490 PART 2 - PRODUCTS 2.1 SEED MIX A. Processing Sites: The following seed mix shall be used for seeding of final grades except in the Wetlands: Seeding Rate Pure Live Seed 1. Seed Species (Pounds Per Acre) Western wheatgrass (Agropyron smithii arriba) 21.0 Tall wheatgrass (Agropyron elonqatum jose) Total 27.0 48.0 2. The seeding rates shown are for drill applied. These rates shall be increased by 100 percent if broadcast- ing method of application is used. Hydroseeding shall not be used. B. Wet Meadow/Shrub Wetlands: The following seed mix shall be used for seeding as shown on the Subcontract Drawings: 1. Seed Species Salt Grass (Distichlis spicata) Foxtail Barley (Hordeum jubatum) Alkalai Sacaton (Sporobolus airoides) Total Seeding Rate Pure Live Seed (Pounds Per Acre) 16.0 16.0 16.0 48.0 2. The seeding rates shown are for drill applied. These rates shall be increased by 100 percent if broadcast- ing method of application is used. Hydroseeding shall not be used. RFL-PII-II Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 02935 - 2 70125 091490 1 C. Wetlands Buffer Zone: The following seed mix shall be 1 used for seeding as shown on the Subcontract Drawings: Seeding Rate Pure Live Seed 1 1. Seed Species (Pounds Per Acre) Salt Grass (Distichlis spicata) 16.0 t Great Basin Wild Rye 1 (Elymus cinereus) 16.0 Alkalai Sacaton (Sporobolus airoides) 16.0 1 Total 48.0 I 2. The seeding rates shown are for drill applied. These rates shall he increased by 100 percent if broadcast- ing method of application is used. Bydroseeding shall not be used. 1 D. Disposal Site: The following seed mix shall be used for seeding of final grades: 1 Seeding Rate Pure Live Seed ' 1. Seed Species (Pounds Per Acre) Western wheatgrass (Agropyron smithii arriba) 16.0 Bluebunch wheatgrass (Agropyron spicatum) 19.0 1 Indian ricegrass (Oryzopsis hymenoides paloma) 12.5 1 Total 47.5 2. The seeding rates shown are for drill applied. These 1 rates shall he increased by 100 percent if broadcast- ing method of application is used. Bydroseeding shall not be used. 1 2.2 ACCEPTANCE OF SEED 1 Final acceptance of seed will be made by the Contractor based on the following: Seed shall be furnished sepa- rately or in mixture in standard sealed containers with t l Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 70125 1 RFL-PH-II 02935 - 3 091490 the following information provided by the seed vendor on each seed container label: (1) seed name: (2) lot number: (3) net weight: (4) percentages of purity and of germina- tion: (5) seed coverage, in acres, on a pure live seed, basis: and (6) percentage of maximum weed seed content clearly marked for each kind of seed. Seeds shall be packaged by the vendor in even acre coverage containers. The Subcontractor shall furnish the Contractor duplicate copies of a statement by the vendor, certifying that each lot of seed has been tested by a recognized laboratory for seed testing within 6 months of date of delivery. This statement shall include: (1) name and address of labora- tory, (2) date of test, (3) lot number for each kind of seed, and (4) results of tests as to name, percentages of purity and of germination, and percentage of weed content, for each kind of seed furnished, and, in case of a mix- ture, the proportions of each kind of seed. 2.3 FERTILIZER Fertilizer, if required, shall be a standard commercial grade and provide the nutrients as determined by the soils fertility analysis specified in Article 3.1.C. Fertilizer shall be furnished in new, clean, and sealed containers with the name, weight, and guaranteed analysis of contents clearly marked. A liquid form of fertilizer providing the nutrients as determined by the soils fertility analysis specified in Article 3.1.0 may be used. If the fertilizer is delivered in bulk, the Subcontractor shall submit to the Contractor, for each load, a certificate from the manufacturer or supplier indicating the above-mentioned information. 2.4 MULCH Mulch shall consist of grass hay. Mulch shall be free from all viable seed, mold, or other objectionable material. Final acceptance of mulch will be by the Contractor. 2.5 WATER Water used in the planting or care of vegetation shall be free of oils, acids, alkalies, salts, or any substance injurious to plant life. RFL -PH -II Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 02935 - 4 7012S 091490 2.6 TOPSOIL Topsoil for seeding of disturbed areas within the State of Colorado Highway Department rights-of-way shall conform to Section 207 of the Colorado Standard Specifications. PART 3 - EXECUTION 3.1 PREPARATION A. Timing of Seeding: All final grades not covered by gravel or riprap shall be seeded as soon as practical (after September 15 and until consistent ground freezing) after their completion or as directed by the Contractor. Seeding materials shall not be applied during windy weather, when the ground is excessively wet except in Wet Meadow/Shrub Wetlands, or frozen, or when snow is present. If the ground is wet in the Wet Meadow/Shrub Wetlands, broadcast method of application shall be used. B. Grading and Seedbed Preparation: Before applying seed in a given area, any stockpiled topsoil and select fill shall be put in place and the area shall be graded as shown on the Subcontract Drawings. Processing and Disposal site surfaces, except Wet Meadow/Shrub Wetlands, shall be graded to slope gradually towards drainage courses, with no enclosed low spots where water can accumulate. The Wet Meadow/Shrub Wetlands shall be graded to provide undulat- ing surfaces for water accumulation. Areas to be seeded that have been damaged by erosion or other causes shall be restored prior to seeding and then cultivated to provide a reasonably firm but friable seedbed. A minimum of 6 inches of surface soil shall be in a loose condition at the time of fertilizer and seed application. C. Enrichment: Micronutrient fertilizer requirements, if any, shall be determined by laboratory soils fertility analysis of representative soil samples from each of the following project areas: Old Rifle processing site, New Rifle processing site and Estes Gulch disposal site. The Subcontractor shall collect representative soil samples and have them analyzed by a certified soil laboratory. A copy of the laboratory report shall be submitted to the Contractor for approval prior to application of fertilizer or seed. RFL -PH -II Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 02935 - 5 7012S 091490 3.2 APPLICATION A. Seed shall be applied by a rangeland drill to a depth of 0.50 to 0.75 inch and at a spacing of not more than 7 inches. To the greatest extent possible, seeding shall be oriented along (parallel to) land contours. For slopes too steep or soils too moist to use a drill, a mechanical broadcaster may be used and the seed raked in. B. Immediately following seeding, mulch shall be applied at a rate of 1 ton per acre to all areas seeded, and the mulch shall be crimped with a mulch crimper. 3.3 CARE DURING CONSTRUCTION The Subcontractor shall be responsible for protecting and caring for areas seeded before final acceptance of the work. The Subcontractor shall repair any damage to seeded areas caused by erosion or construction operations without additional compensation. PART 4 - MEASUREMENT AND PAYMENT 4.1 MEASUREMENT A. Measurement for payment for the following items of seeding will be by acreage actually seeded and approved: 1. Seeding of Processing Sites. 2. Seeding of Estes Gulch Disposal Site. 3. Seeding of Wet Meadow/Shrub Wetlands. 4. Seeding of Wetlands Buffer Zone. B. Separate measurement for payment will not be made for any incidental work and services: e.g., loosening the surface, applying fertilizer, mulching, watering, and erosion repair related to seeding. 4.2 PAYMENT Payment for seeding items mentioned in Article 4.1.A above will be by their applicable unit prices per acre quoted therefor in the Bid Schedule. The prices quoted shall RFL -PB -II Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 Seeding 02935 - 6 70125 091490 include full compensation for furnishing all materials, tools, equipment, incidentals, labor, and for performing all work specified herein for complete work. RFL -PH -II END OF SECTION 02935 Document No. 3885 -RFL -S-01-00747-03 Issued for Construction -Revision 0 seeding 02935 - 7 70125 091490 o WAIVER IS GARFIELD COUNTY'S OPTION 20. INDUSTRIAL PERFORMANCE STANDARDS PERMIT LIST o DREDGE AND FILL o RIGHT OF WAY -LAND USE (TEMP) o RIGHT OF WAY -LAND USE (FINAL) o T&E SPECIES CONSULTATION DISPOSAL SITE ACCESS ROAD HIGHWAY 13 WIDENING o CULTURAL RESOURCE CLEARANCE DISPOSAL SITE ACCESS ROAD HIGHWAY 13 WIDENING o CDPS PROCESS SITE DISPOSAL SITE o AIR EMISSION NOTICE PROCESS SITE DISPOSAL SITE APEN LAND DEVELOPMENT HIGHWAY 13 THIRD LANE 20. INDUSTRIAL PERFORMANCE STANDARDS, CONTINUED PERMIT LIST o WATER RIGHTS COLORADO RIVER/DISPOSAL o HAZARDOUS WASTE STORAGE o WELL ABANDONMENT o STATE HIGHWAY ACCESS HIGHWAY 13 TO DISPOSAL SITE o CERTIFICATE OF DESIGNATION FOR SOLID WASTE DISPOSAL o CONDITIONAL USE o STATE HIGHWAY UTILITY PERMIT HIGHWAY 13 PROCESS SITE Tr- ic I ji Iz 0 0 Z cr. prr_ u 00 UJ I]:1 0.1 -!;1- J o°�� C 1 R :i 1:n. �'lln API�IIOXIMATI. sin. /A, LOC IIONi la t 1 i IN 0/ P11011OS1 D v ACCESS — v Ihi ROAD r zi 0000 \ ••• 1 N_ 26 -6000 lona .a 1000 :1000, SCALE IN FCLiT LEI -1E110 -'--`-^POWER THANSMISSION Lin[ ----- DIRT nom) 111?1:: MllDlrllEO FIIOM THE RIFLE 7.5 M114. IJSOS OUAO. - AI.I'IIA 'I'ItACI( DEVICES o r (2 PER IAICA'I'ION) A Alt PAIt•I'lCI1LA'I'I FIGUIII: D.3.0 - SAMNA.: STATION TOPOGEIAPIIIC LOCATION MAP OF Tim ESTES GULCII SITE ARCA 1 I1-103 I (3 • 1 I 41:11..1. 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