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COLORADOAV ' <br /> Division of Water Resources <br /> Department of Natural Resources <br /> n '1313 Sherman Street, Room 821 <br /> Denver,CO 80203 <br /> October 7, 2014 t <br /> Hall-Irwin Corporation <br /> 301 Centennial Drive ' <br /> Milliken, CO 80543 <br /> c/o Benny Siljenberg (Brierley Associates) <br /> bsilienberg@brierleyassociates.com ' <br /> RE: CLAY LINER APPROVAL <br /> CLAY LINER RESERVOIR-CELL 2 (WDID 0503324) <br /> HOKESTRA PIT, DRMS M-1980-149 (WDID 0503006) ' <br /> NW1/4 OF SECTION 2, T2N, R68W, WATER DIVISION 1, WATER DISTRICT 5 <br /> Dear Mr. Siljenberg: <br /> The purpose of this letter is to approve the lining of the Clay Liner Reservoir (Cell 2). The Clay Liner <br /> Reservoir is located primarily in the NW1/4 of the NW1/4 of Section 2, with areas in the NE1/4 of the NW1/4 <br /> and the SW1/4 of the NW1/4, of Section 2, all in Township 2 North, Range 68 West of the 61h P.M., and is a <br /> part of the Hokestra gravel pit (DRMS M-1980-149). This clay liner leak test commenced June 10, 2014 and <br /> concluded on September 8, 2014. Site inspection was performed by our office on May 28, 2014 and a <br /> meeting was held on July 9, 2014 to review site conditions and the leak test plan. <br /> Your report dated September 29, 2014 provides the liner summary and leak test result. The test data , <br /> provided indicates that the reservoir has been lined to the design standard referenced in the August 1999 <br /> State Engineer Guidelines for Lining Criteria for Gravel Pits (1999 SEO Guidelines). Meeting the design <br /> standard requires that during reservoir operations all water inflows and outflows for the liner perimeter <br /> enclosed area be accounted for on a monthly basis. <br /> With this liner approval, the Clay Liner 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 t <br /> allowed by statute or decree. At all other times, all inflow of water into the reservoir from any source, <br /> including precipitation and ground water inflows shall be removed to prevent illegal storage of water. Prior <br /> to ANY use of this site, the owner or operator will need to coordinate with Shera Sumerford, District 5 Water , <br /> Commissioner, to 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 /> tAJ1 <br /> Tracy Kosl Ff, P.E. ' <br /> Water Re ource Engineer <br /> ec: Shera Sumerford, District 5 Water Commissioner (Shera.Sumerford@state.co.us) <br /> Louis Flink, Diversion Records Coordinator (Louis.flink@state.co.us) <br /> WDID File (0503324 $ 0503006) <br /> o> coz <br /> "off <br /> 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.Co.us I 101 <br />