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HomeMy WebLinkAbout2.0 BOCC Staff Report 11.20.1995• • BOCC 11/20/95 PROJECT INFORMATION AND STAFF COMMENTS REQUEST: Special Use Permit for the construction and operation of a natural gas compressor. APPLICANT: Questar Pipeline Company LOCATION: A parcel of land located in Section 18, T6S R93W and Section 13, T6S R94W of the 6th P.M.; approximately 2 miles west of Rifle off of CR 264. SITE DATA: 9.64 Acres WATER/SEWER: Will not be used ACCESS: Direct access to CR 264 EXISTING/ADJACENT ZONING: R/L I. RELATIONSHIP TO THE COMPREHENSIVE PLAN The subject property is located within District C - Rural Areas/Minor Environmental Constraints and District D - Rural Areas/Moderate Environmental Constraints, as designated by the Garfield County Comprehensive Plan's Management Districts Map. 11. DESCRIPTION OF THE PROPOSAL A. Site Description: The property to be used is a 9.64 acre parcel located north of CR 264 approximately two (2) miles west of Rifle among other industrial land uses. The site has been previously leveled and little vegetation exists. The parcel slopes very gently from north to south and a support facility/field office is located approximately 200 feet south of the site. An existing concrete pad is located immediately south of where the compressor would be placed, which was once used as a pad for an earlier compressor. See sketch map on page B. Adjacent Land Uses: This area is an industrial site which supports a number of similar uses for the oil and gas industry. Snyder Oil, Public Service, Northwest Pipeline and Umetco Minerals, amon 7 thers, all have operations in the immediate vicinity. See vicinity map on page C. Project Description: The applicant proposes the constriction of a natural gas compressor facility and a distribution pipeline which would supply natural gas from the applicant's existing transmission line to the Rocky Mountain Natural Gas (RMNG) facility, located approximately 2000 feet to the west. The compressor will be an Ajax DPC-360, natural gas fired, which will boost pressure from 550 psig to 850 psig at a maximum 400 RPM. Compressed gas volumes will range from 5 MMSCFD to 18 MMSCFD. The compressor will be set on a prepared pad using portable surface mount bases and a pre-engineered metal building will be built around the unit. Except for periodic maintenance, it is assumed the facility will be operated 24 hours/day, 365 days/year. • • 11I. MAJOR ISSUES AND CONCERNS A. Easements: The property where the compressor will be located is owned in fee by the applicant; however, the distribution line that will carry the compressed natural gas to the RMNG facility will cross an adjacent land owner's property. The applicanthas received an easement from the adjacent land owner and is attached on pages 7.../ . B. Zoning: The subject property exists within the R/L zone district which does allow this type of facility, upon issuance of a Special Use Permit. C. Legal Access: Access to the facility is directly from CR 264 and, it appears, that no additional easements are required. State and Local Health Standards: An Air Pollution Permit from the Colorado Department of Health has been applied for (see application on page/0 . l 3 ), and assumes the following annual emission amounts: NOx 10.43 tons/year; CO 1 1.73 tons/year; NMHC 7.50 tons/year; VOC 4.17 tons/year. Revised emission estimates have been submitted which indicate higher levels of emissions than earlier calculations. It appears that the above listed emissions are "not to exceed" levels, submitted to the Colorado Department of Health with the application for an air pollution permit. Staff has not been able to determine if the air pollution permit application has been amended to reflect these new estimates. See the Air P lution application on pages lb -13 and the revised estimates on page Staff recommends that any approval be contingent on the State granting the air pollution permit for the amended emissions levels. E. Noise: Sound Pressure Levels (in decibels, dB) have been calculated by the manufacturer of the compressor to be used and show that noise generated by the engine/compressor unit will be approximately 108 dB at the source, when operating at a maximum 400 RPM. Additional noise levels have been calculated and are reported below: Distance: 20 feet Sound Power Level: 81 dB 100 feet 67 dB 200 feet 61 dB It appears that at the property line, approximately 200 feet from the compressor, the noise will be 61 dB. For comparison sake, normal human conversation at three(3) feet is in the 60 dB to 65 dB range. See Sound Pressure Levels on page / 5- . F. Vibration: The operation of the unit will, most likely, create some vibration on and near the site. It will be necessary to construct a foundation or pad that will make vibrations imperceptible, except by instruments, at any point outside of the property boundary line where the unit will be located. G. Soils: The Soil Conservation Service identifies the parcel of land to be used for this proposal as being in the Arvada loam class, having severe shrink -swell potential. Conversations with the applicant's engineer have indicated that the proposed method of setting the compressor on a prepared pad will be adequate to mitigate any problems associated with the shrink -swell potential of the soil. H. Wildlife Considerations: Impacts caused to wildlife from the construction and operation of this facility should be minimal or non-existent as the site is already industrial in nature and probably not a part of habitat or migration routes. • 1 I. Fire Protection Measures: The applicant has submitted a list of fire control measures which app r to be adequate in the event of a fire (see attached fire control measures, page ___,). Additionally, the applicant will be required to adhere to the provisions of the National Fire Code as it applies to this type of facility. Staff recommends that the applicant tile an emergency plan with the appropriate fire protection district. In the event of a fire, adequate access to the site does exist. J Traffic: It is expected that traffic in the immediate area will increase during the construction of the facility, estimated to last from two (2) to four (4) weeks. After completion, it is assumed that traffic will return to pre -construction levels. K. Revegetation: The applicant has submitted a revegetation plan concerning the pipeline portion of this proposal. It appears that this plan is adequate to correctly reclaim a d revegetate the disturbed lands. See the Reclamation Plan on pages IV. SUGGESTED FINDINGS I . That proper posting and public notice was provided as required for the meeting before the Board of County Commissioners. That the hearing before the Board of County Commissioners was extensive and complete, that all pertinent facts, matters and issues were submitted and that all interested parties were heard at that meeting. 3. That the application is in compliance with the Garfield County Zoning Resolution of 1978, as amended. 4. That for the above stated and other reasons, the proposed exemption is in the best interest of the health, safety, morals, convenience, order, prosperity and welfare of the citizens of Garfield County. V. RECOMMENDATION Staff recommends APPROVAL of the application, subject to the following conditions: 2. That all representations of the applicant, either within the application or stated at the meeting before the Board of County Commissioners, shall be considered conditions of approval. The applicant shall have 360 days from the date of the Resolution of Conditional Approval to meet all conditions set forth in the Resolution. The Special Use Permit shall be issued when all conditions are met and shall expire 360 days after issuance, unless construction or use have commenced. The amount of noise to be generated by the operation of this facility be consistent with the predicted decibels (dB) as indicated herein. The predicted amounts will be used as the maximum allowable level and if sound power levels exceed these allowable limits, immediate mitigation must take place at the sole expense of the operator of the facility. 4. The construction of the foundation or pad for the engine -compressor unit be done in a manner to prevent perceptible vibration from occurring outside of the property boundary as it exists on the Property Survey Map. All construction will be done with respect to the shrink -swell potential of the soil as identified by the SCS, Rifle Area book, in order to mitigate any possible problems associated with the shrink -swell potential of the soil. • 1 5. Final approval is subject to receiving the required permits from the Colorado Department of Health concerning the emissions permit, reflecting the amended emissions levels, and any other permits which may be required for the construction or operation of this facility. That the applicant will apply for and receive any and all building permits associated with the construction of the building which will house the compressor facility. 7 That all out-of-state vehicles or equipment to be used for the construction of this facility be registered or apportioned within the State of Colorado or the County of Garfield. That the applicant consult with the Rifle Fire Department and file an emergency plan with said Department. That revegetation of the lands disturbed by the installation of the pipeline shall be in strict accordance with the revegetation plan that has been submitted with this application. /6. 61- c i'Mtv v i i (.,c t4 NT Cfi PLAN WOO 1 d f:l ss r 0 • \ ri e cr I ,,, �`II V It , � \ Du z I I I I I I I , c (I) I i o �•j� \ \Q -I44, a ` ` 1^� 11 11 11� t4, PROF CASED SUCTION ss 3 O � JJ - /(J) r 1 I( /I W 11 rr ti ' IIQ m_ O U n o --I U O <L wU)7 oz� OW o r CL (�T - ti'- X �– F— OCL r i Oxw r� �_� 0 U uz Quo U \1 2 I o \I ,'. Vi et si O lit' \ I ::: z z 41it M co V \ a z / \1 i co/ ': Iii. '4Z "i/)i SVEIrCJS N 406 AC �c as. RIFLE YARD COMPRESSOR STATION AREA MAP J • -r e Ioo I e07 �ors•tia 5i ♦Jl 11 ,,,tt,,,n„t,UI„ 13 Il /1 jA n C= I' n U °7• 560 IN TEAS TA /VER -- fes_ f 24 ,---Th__,\ 1 255 256 257 Edge markings in LJTM coordinates (km). ViclAwry 258 259 4382 4381 4380 4379 4378 4377 i usr/s1c/m168/33599.dgn 9-25-95 km 1Z11111 -(_)I-WAY AND EASEMENT G•NT VV. F. Clough, of (.i infield County, State of Colorado, ("Grantor") conveys and warrants to Questar Pipeline Company, a Utah corporation ("Grantee"), a right of way and easement 50.00 feet in width through and across the following lands situated in Garfield County, State of Colorado ("the Lands"): The centerline of the right of way shall extend through and across the Lands as follows: C0I\I1\1I?NCING at the section corner common to Sections 12 and 13, Township 6 South, Range 94 West, and Sections 18 and 19, Township 6 South, Range 93 West, 6th Principal Meridian, Garfield County, Colorado, being a stone monument, thence S.14"44'29"W. (55.75 feet to the POINT OF BEGINNING, Station 1+36.64 on a gas pipeline right of way for Questar Pipeline Company, and a point on or near the property line of Questar Pipeline Company's Rifle Yard; "Thence 5.52"35'47"W. 24.78 feet; Thence N.07"37'46"W. 9(1.51) feet; Thence N.40"1 0'12"W. 55.15 feet; Thence N.60"13'27"W. 134.69 feet; Thence N.49"32'25"W. 202.12 feet; Thence N.52"01'45"W. 257.55 feet; Thence S.85"32'24"W. 225.52 feet; Thence N.76" 1$'35"W. 394.5( feet; Thence S.59"(10'59"W. 253.21 feel; Thence S.56"56'07"W. 101.52 feet to Station 19+37.11 on said gas pipeline right of way, S.53"25'05'L:. 1,060.45 feet from the quarter section corner COI1111)011 to said Sections 12 and 13, being a brass cap and iron pipe monument. This right of way ttnd easement is granted in consideration of TEN a11cI NO/I0O DOLLARS ($10.00) and other good and valuable consideration, receipt of which is acknowledged, all(I shall permit Grantee to lay, maintain, operate, repair, inspect, 1)rOtect, remove and replace pipelines, valves, valve boxes and other gas transmission and distribution facilities, (collectively, the "Facilities") through and across the (.ands. Grantee shall be entitled to have and to hold this right of way and easement for so Tong as the facilities shall be maintained, with the right of ingress to, egress from, and access on and along the right of way to construct, maintain, Operate, repair, inspect, protect, remove and replace the Facilities. This right of way and easement shall carry with it the right to use existing roads for the purpose of conducting the foregoing activities. Grantee may also temporarily use such portion of Grantor's property along and adjacent to the right of way as may be reasonably necessary in connection with construction, maintenance, repair, removal or replacement of the facilities. Grantor shall have tight to use the Lands, except for 1I•urposes for which this right of way and easement is granted to Grantee, provided such use does not interfere with the Facilities or any other rights granted to Grantee under this Right -of -Way and Easement Grant ("Grant"). Grantor shall not huild or construct nor in any way permit to be built or constructed any building or other improvement over or across the right of way, nor change its contour without written consent of Grantee. Grantee will use such methods of weed control on the easement for live (5) years as are reasonably necessary Io control the growth of thistle and other noxious weeds. Grantee agrees to pay damages that may arise to crops or fences caused by the exercise of its rights under this Grant. Should any unresolved dispute arise as to such damages, it shall, at the written request of either party, be arbitrated and determined by disinterested arbitrators, one Io he appointed by Grantor and one by Grantee within 20 days after such request. If the two so chosen arc unable to agree within 90 clays alter appointment, then they shall, within 30 days after written request by either the Grantor or the Grantee, select a third arbitrator. if the two arbitrators cannot agree on a third arbitrator, either Grantor or Grantee may seek appointment of a third arbitrator by 0 federal district judge of the district in which the Lands lie. The decision of any two of the arbitrators so appointed shall he final. This Grant shall he binding upon and inure to the benefit of the (heirs, legal representatives, successors and assigns of Grantor and the successors and assigns Or the Grantee and may he assigned in whole or in part by Grantee. 'Phis Right -of -Way and Easement Grant represents the entire agreement between the parties. WITNESS the execution hereof this 1_6- day of /V� VI , 1995. Witness: GRANTOR: waw W. F. CLOUGI-I STATE OF Abod COUNTY OhOd/iWe 1 On this / rH day of NOV , 1995, personally appeared before me >!(i.F. cis , the signer of the foregoing instrument, who duly acknowledged tcYme that _he__ executed the snnne. My Commission Expires: 7 -1n -9F" ONO Notary Public Residing at: 1 • • QUESTAR PIPELINE COMPANY 79 SOUTH STATE STREET • P.O. BOX 11450 • SALT LAKE CITY, UTAH 84147 • PHONE (801) 530-2400 • FAX (801) 530-2570 John E. Corrent, Senior Design Engineer Codes and Environmental Affairs September 27, 1995 Colorado Department of Health Air Pollution Control Division 4300 Cherry Creek Drive South Denver, Colorado 80222-1530 Attn: Mr. Dennis Myers Re: APEN/Permit Application for the installation of an engine driven compressor for the Rifle Yard, Garfield County. Dear Mr. Myers: Questar Pipeline Company (Questar Pipeline) is planning on installing a natural gas fired, internal combustion engine driven compressor at the Rifle Yard located in Garfield County, Colorado (refer to attached drawing M-14551). Questar Pipeline based the emission rates listed below on the potential to emit for the proposed unit. The potential to emit is based on yearly operating hours (8760) multiplied by the maximum emission rate in pounds/hour. The actual make of the engine has yet to be finalized; therefore, the emissions reflected in this Application are intended as a not to exceed number. The actual'emissions for the unit will be determined and reported to the APCD prior to final approval of the permit. The proposed engine will account for the following emissions in tons/year: Proposed Source Potential to Emit TABLE I VOC refers to non -methane & non -ethane hydrocarbons. Make/Model EMISSIONS TPY BASED ON 0760 HOURS/YEAR NOx CO NMHC VOC1 TOTAL 10.43 1 1 .73 7.5 4.17 VOC refers to non -methane & non -ethane hydrocarbons. • The listed emissions in tpy are based on the maximum emission rates in Lb/hr. for this engine operating at nominal conditions; NOx = 2.38 Ib/hr., CO = 2.68 Ib/hr., NMf-IC = 1 .71 Ib/hr, and VOC = 0.952 Ib/hr The new engine driven compressor will be installed in Questar's existing Rifle yard. The unit will compress gas from Questar's facilities into the Rifle Dew Point Plant owned and operated by others. This gas will then be discharged into the Avon Pipeline for delivery to residential customers. Questar has no other reportable emission sources located at this site. Schedule Questar must commence with the installation of this unit beginning on November 1, 1995. It is estimated that construction will be completed and start-up will commence on or around December 1 6, 1995. Questar requests that this project receive expedited review and approval. The gas being supplied from Questar's proposed compressor will be delivered to the Rifle Dew Point Plant to be processed and used for the residential customers located along the Avon Pipeline to provide heat for the coming winter months. A partial list of the communities that will be served are Rifle, Glenwood Springs, Snowmass, Aspen and the Vail Valley. Questar requests that the Division exempt the installation of this compressor unit from the 30 day comment period. In accordance with Regulation No.3, Part B, IV.C.1 .a., the new installation will not have emissions greater than fifty (50) tons/year and is located in an attainment area which is rural in nature. Questar would appreciate the opportunity to meet with the APCD to discuss ways to expedite the approval of this project. Questar will plan on contacting the APCD within the next 15 days to arrange a convenient time to meet and discuss this project. An APEN has been included in accordance with Regulation No. 3, Part A.II. for the proposed source, plus $100 in APEN filing fees. If there are any questions concerning this information, please contact me at the above letter address or by telephone number at (801) 530-2516 or FAX (801) 530-2684. attachments Jahn E. Corrent (JC) .APPLICATION FOR AIR POLLUTION EMISSION PERMIT OR PERMIT MODIFICATION This application trust be filled out completely except for #14 and #15: otherwise, application will be considered incomplete - SEE INSTRUCTIONS ON REVERSE SIDE. Mail completed application APENs and filing fee to: Colorado Department of Health APCD-SS-B1 4300 Cherry Creek Drive South Denver, Colorado 80222-1530 Telephone: (303)692-3150 1. Permit to be issued to: Questar Pipeline Company 2. Mailing Address: State: Utah 79 South State Street P.O. Box 11450; Salt Lake City Zip Code: 84147 3a. Agent for Service (see No. 3 on reverse): N/A 3b. Federal Tax Identification Number:87-0307401 4a. General Nature of Business Natural Gas Transportation 4b. SIC Code: 4922 Sa. Air Pollution Source Description: Natural gas fueled Internal combustion engine compressor 5b. Days per year source will operate: 365 6a. Source Location Address (Include Location Map): Sec. 18, T6S R93W Township Range, direction and distance from nearest town or intersection) County: Garfield 6b. UTM Coordinates (un tan) 257 E 437.8 N (If using and give 7. ESTIMATED COSTS: 7a. Source, Process Equipment or Project: Cap. Cost $ 500,000 Air Pollution Control Procedures or Equipment 7b. Capital Cost: 7c. Operating Cost: /annually 8a. STATUS X New Air Pollution Source ❑ Modification to Permitted Source (Control Equipment added, process change, etc.): ❑ Transfer of Ownership - Transferred front: ❑ Existing Source -not permitted (Include Date of Source Startup): ❑ Other: Projected Dates for Construction,to: 8b. Begin: Nov., 1995 8c.End Jan., 1995 Projected Source Startup Date: 8d. Dec, 1995 9. Enclose check to cover APEN FILING FEES. One APEN should be filed for each emission point NOTE: Additional processing fees Hurst also be paid prior to permit issuance. APENS @$100.00 per APEN = $100 10. SIGNATURE OF LEGALLY AUTHORIZED FRSON (NOT Ven r or Equipment Manufacturer) 1, J 11a. Date Signed: i s � lib. Telephone No.: (mo) 5 - 6 - z i z I / 12. Type or Print name and official title of person signing item 10. Mr. Gary DeBernardi, Vice President of Engineering and Transmission Services 13. Check appropriate box if you want: Agency Use Only a. Copy of preliminary analysis conducted by Division b. To review a draft of the permit prior to issuance? Note: Checking either item could result in increased fees and/or processing time. See Reverse. 14. DATE RECEIVED 15. PERMIT NUMBER z 3. 3 10 c9 iP 1 1 O 0 0 z m G 0 H 0 WOO Uo1SSIWS O C 0 O z 0 0 z 0 0 0 1ua33o3 '3 u3 uoISad 3oivas3uu 9ISZ-OC 9 IL 08)3.“'"d 'Alia a)1 1 1IeS •OSPL L X08 O d LCL7:79 401(1 o40asNouvDo11NV1J z C N (33 0 (D 0 n 3 piaiye3w,Nnoo ON 11WU3d H 71 ro 0 0 xoa aJIsox NOISSIW 0 ad SOURCE EMISSIONS DATA AIR CONTAMINANTS EMITTED: Emission Point Engine Data: Ajax DPC-360 A. Exhaust Gas Temperature - 480° F estimated' B. Exhaust Gas Flow Rate - 2,628 ACFM estimated' C. Exhaust Stack Diameter - 13.25 I.D. D. Exhaust Gas Velocity - 2,995 ft/min, estimated' E. Nominal Rated Ilorsepower - 364 BHP Ccr? 400 rpm Heat Rate - • 8,500 BTU/BHP-hr. ±/- 3% estimated' F. Pollutant Data: (Q 15% 02) estimated* Pollutant tons/yr a. NOx 16.7 CO 28.0 SO2 N/A NMHC 5.4 * Estimated quantities are based on fuel composition, BHP, RPM, ignition timing, and exhaust stack diameter: • . Inter -Office Correspondence To: Dave Ingleby Date: October 31, 1995 From: Bill Baum Subject: Rifle Compressor Information DEF: 95-545 Copy: The compressor installation for Rifle will be an AJAX DPC-360. The unit will boost pressure from 550 psig to 850 psig to supply gas to KN Energys liquids recovery plant. Compressed volumes will range from a minimum of 5 MMSCFD through a maximum of 18 MMSCFD. Plans are to transfer the compressor to this location, along with portable surface mount bases, and set the unit on a prepared pad adjacent to an already existiing foundation. The compressor will be housed in a pre-engineered non-flammable industrial style metal building designed for local snow and wind loads and live loads due to hoisting equipment. Ancilliary on site equipment will include a stock tank for accumulation of dumped scrubber liquids, tank for lubrication oil, and spare parts stroage. Noise estimates are derived from A -weighted Sound Pressure Levels measured at 200 feet with the engine running at its maximum 400 RPM from vendor supplied infromation for the AJAX DPC-360. Using the supplied A -weighted dB's; the source power level was calculated and then projected out at 20' intervals as follows: Source Sound Pressure Levels (dB's) 20' 40' 60' 80' 100' 120' 140' 160' 180' 200' 107.87 81.35 75.33 71.81 69.31 67.37 65.79 64.45 63.29 62.27 61.35 Attached are copies of vendor data for the AJAX DPC-360 and information about the physical equipment on this unit. • • FIRE CONTROL MEASURES QUESTAR PIPELINE COMPANY'S RIFLE YARD COMPRESSOR & INTERCONNECT PIPELINE GENERAL All project personnel are instructed as to: 1. Location of fire control equipment 2. Operation and use of fire control equipment 3. Emergency procedures and how to call for additional help WELDING At least one person is dedicated to act as a fire watch during welding operations with a Eire extinguisher at hand. Welding shields are used during grinding operations to prevent sparks from leaving the work areas and igniting vegetation. as conditions dictate. Water trucks are used to wet down ground and nearby vegetation, as conditions dictate. At the close of each day, welding personnel inspect the area of welding activities for any s►noldering debris and any conditions conductive to fires. COMMUNICATIONS All Questar Pipeline vehicles are equipped with radio communications to 0 central dispatch which can relay any prohlenls to the prO!)er authorities. IN THE EVENT OF ;\ TIRE In the event of a fire, all personnel and appropriate equipment on site will he committed to its containment and control. The BLM and appropriate fire authorities will I)c notified immediately. Direction of the fire control efforts will be transferred to appropriate fire fighting agency personnel upon their arrival on site. • • RECLAMATION PLAN FOR `TIE KN ENERGY INTERCONNECT 1.0 INTRODUCTION The following KN Energy Interconnect Reclamation Plan provides for reclamation and revegetation of areas disturbed by construction of the interconnecting pipeline. This plan consists of procedures that are expected to optimize reclamation and revegetation success. The procedures described in this plan are intended to accomplish the following objectives: • Provide effective erosion control through physical reclamation means such as salvaging and protecting topsoil; and • Reestablish, in a timely manner, indigenous or other suitable vegetation. 2.0 PROJECT DESCRIPTION The project consists of approximately 1.800 linear feet of 10 3/4 -inch diameter pipe interconnecting Questar's transmission pipeline system with KN Energy's facilities. The interconnect is located on private lands previously disturbed by natural gas transmission facilities. Appurtenant facilities associated with the interconnect consists of compression and a 10 -inch tap and valves which will he installed at Questar's Rifle facility located in Section 13, Township h South. Range O=1 West, Garfield County, Colorado. 3.0 RECLAMATION Reclamation activities will be initiated alter the completion of construction. Reclamation consists of both physical methods incl revegetation methods. Construction, backfilling and grading activities commonly cause compaction and alter soil conditions that affect soil productivity and/or seeding success. The following practices and techniques will be used to improve these soil conditions, protect soil from erosion and provide a favorable seedbed: • Disturbed areas will he scarified to ensure that soil compaction is reduced and preconstruction soil permeability is restored. • Seedbed preparation will he conducted to a depth of 3 to 4 inches to provide a first seedbed to enhance rcvct;clation. • 'Topsoil replacement will be performed over the disturbed area. • Topsoil will not be redistributed if the ground or topsoil is frozen. • Seed will he planted by drilling or broadcasting. Drill seeding with a drill equipped with a depth regttlator will he used where soil conditions allow operation of equipment. In areas not suitable for drilling, die seed will he broadcast and covered by raking or chaining. If broadcasting methods are used, seeding rates will he doubled. • The following seed mixture is proposed: Seed mixture Drilled Western wheatgass 3 lbs/acre Thickspike wheatt;rass 3 lbs/acre Indian Ricegrass 3 lbs/acre Salt S;iLLe 3 lbs/acre llourwinti, SiIthush 3 Ihs/acre • Ninety percent pure live sled will be used. • Noxious weed control measures will he implemented for at least give years after construction. • Fertilizers will he used if requested by the landowner. • Any brush removed during.; construction will be spread along the right-of-way to control erosion. • Stormwater discharges and spring runoff will he diverted by waterbars to a stabilized outlet. Waterhars will he installed according to the following table: Grade << Spacing (feel) 5(,,i or less None 5`-r - 15c/c 300 1 >cii. - 3U<<. 2U() >30 100 • Disturbed areas with rock fragments, such as very coarse gavel, cobble, or stone scattered on the surface, will be restored to the original preconstruction surface condition to blend with the adjoining area. • • 4.0 MAINTENANCE AND MONITORING An inspection of the right-of-way will be conducted by Questar for two growing seasons after construction. Monitoring will determine if revegetation efforts were successful. Problem areas will be identified and reseeded. Revegetation efforts will be continued until vegetation is established. Erosion control structures will a Iso be inspected and repaired if necessary. z O NOI1d1213S3a to SNOISIA3M 'D 0 m (f U 0 L r� • I i • I _ _ 1 r -� L 1 r -1 fr' L _i [1 i• • • • r w R94w. . 9 3 \'J.