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C O L O R A D O John W. Hickenlooper <br /> Governor <br /> Division of Water Resources <br /> Department of Natural Resources Robert Randall <br /> Executive Director <br /> Kevin G. Rein, P.E. <br /> Director/State Engineer <br /> December 7, 2018 <br /> J at T Consulting Inc. <br /> J.C. York, P.E. <br /> 305 Denver Avenue, Suite D <br /> Fort Lupton, Co 80621 <br /> Transmission via Email: icyork@i-tconsulting.com <br /> RE: Slurry Wall Liner Approval - Provisional <br /> Journey Venture Reservoir (WDID 0103032) <br /> Journey Venture Gravel Pit, DRMS M-2008-080 (WDID 0110849) <br /> E'/z of Section 7, T5N, R64W, 6ch P.M. <br /> Water Division 1, Water District 1, Weld County <br /> Dear Mr. York: <br /> The purpose of this letter is to provisionally approve the lining of the Journey Venture Reservoir. This reservoir is <br /> located in the EY2 of Section 7, Township 5 North, Range 64 West of the 6"' P.M., and is a part of the Journey Venture <br /> gravel pit (DRMS M-2008-080). A slurry wall was constructed around the mining area. Mining has not completed within <br /> the liner boundary and will continue for several years. The slurry wall liner leak test commenced on July 28, 2018 and <br /> concluded on October 26, 2018. A site inspection was performed by our office on November 20, 2018 to review site <br /> conditions. <br /> Your report dated November 5, 2018 provides the liner summary and leak test result. The test data provided indicates <br /> that liner meets the performance standard referenced in the August 1999 State Engineer Guidelines for Lining Criteria <br /> for Gravel Pits (1999 SEO Guidelines). Meeting the performance standard requires that during reservoir operations <br /> all water inflows and outflows for the liner perimeter enclosed area be accounted for on a weekly basis. <br /> This liner approval is applicable only during mining operations at the site and does not classify the structure as a <br /> reservoir capable of water storage. However, for the remainder of mining operations, water within the liner boundary <br /> is now classified as trapped native ground water. The trapped native ground water may be removed from within the <br /> lined area and returned to the stream system through surface flow or ground water recharge without the need for <br /> replacement so long as the operator does not put the water to beneficial use. All native trapped ground water <br /> remaining that is put to beneficial use (except for the water removed in product) must be replaced by the operator. <br /> All inflow of water into the liner boundary from any source, including precipitation and ground water inflows shall be <br /> removed by the pit operator so as not to cause out-of-priority storage. In order for the liner to be approved for <br /> water storage the operator must perform a final leak test once mining is complete and the site is at final grade. <br /> The final leak test will be allowed to have a modified duration of 30-days as long as the liner continues to satisfactorily <br /> operate during mining operations. <br /> Please contact me at 303-866-3581 x8246 if you have any questions. <br /> Sincerely, <br /> loana Comaniciu, P.E. <br /> Water Resource Engineer <br /> Ec: Michael Hein, Assistant Division Engineer (Michael.Hein @ State.co.us) <br /> Evan Snyder, District 1 Water Commissioner (Evan.Snyder@state.co.us) <br /> Louis Rink, Diversion Records Coordinator (Louis.Flink@state.co.us) <br /> WDID File (0103032 It 0110849) <br /> Office of the State Engineer <br /> 1313 Sherman Street, Room 821, Denver,CO 80203 P 303.866.3581 <br /> www.water.state.co.us <br /> �18�76 <br />