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r <br /> r' <br /> 41/4 oN COLORADO <br /> CODivision of Water Resources <br /> " Department of Natural Resources <br /> 1313 Sherman Street,Room 821 <br /> Denver,CO 80203 <br /> August 4, 2015 <br /> DEREK FOSTER <br /> DEERE&AULT CONSULTANTS, INC. <br /> 600 S. AIRPORT ROAD, BUILDING A, SUITE 205 <br /> LONGMONT, CO 80503 <br /> TRANSMISSION VIA EMAIL: Derek.Foster@deereault.com <br /> RE: SLURRY WALL LINER APPROVAL <br /> STAGECOACH STOP RESERVOIR(WDID 0203914) <br /> STAGECOACH STOP PIT, DRMS M-1983-067(WDID 0203015) <br /> WORTHING PIT, DRMS M-M1977-526(WDID 0203061) <br /> SECTIONS 26 AND 35,T1 S, R67W <br /> WATER DIVISION 1,WATER DISTRICT 2 <br /> Dear Mr. Foster: <br /> The purpose of this letter is to approve the lining of the Stagecoach Stop Reservoir. The Stagecoach Stop Reservoir <br /> is primarily located in the SW1/2 of the SW1/4 of Section 26 and the W1/2 of the NW1/4 of Section 35, all in <br /> Township 1 South, Range 67 West of the 6th P.M., and is part of the Stagecoach Stop gravel pit (DRMS M-1983-067) <br /> and Worthing gravel pit (DRMS M-1977-526), The slurry wail was provisional approved on August 7, 2012 while <br /> active mining continued to occur within the liner boundary.The mining is complete. In order for the liner to be <br /> approved for water storage the operator was required to perform a final modified 30-day leak test. The final <br /> modified slurry watt liner leak test commenced June 9, 2015 and concluded on July 16, 2015. Site inspection was <br /> performed by our office on June 24,2015 to review site conditions and the leak test plan. <br /> Your report dated August 3, 2015 provides the liner summary and leak test result. The test data provided indicates <br /> that the reservoir has been lined to the design standard referenced in the August 1999 State Engineer Guidelines <br /> for Lining Criteria for Gravel Pits (1999 SEO Guidelines). Meeting the design standard requires that during <br /> reservoir operations all water inflows and outflows for the liner perimeter enclosed area be accounted for on <br /> a monthly basis. <br /> With this liner approval, the Stagecoach Stop Reservoir is now classified as a lined reservoir in accordance with the <br /> 1999 SEO Guidelines. Water shall not be impounded in the reservoir except pursuant to lawful diversions allowed <br /> by statute or decree. At all other times, all inflow of water into the reservoir from any source, including <br /> precipitation and ground water inflows shall be removed to prevent illegal storage of water. Prior to ANY use of <br /> this site, the owner or operator will need to coordinate with William Schneider, District 2 Water Commissioner, to <br /> review operations,measurement structures,stage-storage curves,and accounting. <br /> Please contact me at the number below if you have any questions. <br /> Sincerely, <br /> cilia-kali/64 <br /> loana Comaniciu, P.E. <br /> Water Resource Engineer <br /> ec: William Schneider, District 2 Water Commissioner (William.Schneider@state,co.us) <br /> Louis Rink, Diversion Records Coordinator(Louis.flink@state.co.us) <br /> WDID Fite (0203914, 0203015 &0203061) <br /> I .e <br /> 1313 Sherman Street, Room 821, Denver,CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.rn " 1r� °' <br /> + ki <br /> ?,B76M <br />