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r rn tc~, ~~ ~~ ~ STATE OF COLORADO OEFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman Stmet, Room 818 Denver, Colorado 80203 Phone (303) 866-3581 FAX (303) 866-3589 www.water.siate.co.us R//ECEIVED ~dAN 0 2 2001 Division of Reclamation, Mining and Safety January 2, 2007 ~~~c .~e a ~ 'rave Melanie Lawrence Leonard Rice Engineers, Inc. 2000 Clay Street, Suite 300 Denver, Colorado 80211-5119 ,~ Re: S&H Mine Gravel Pit, Substitute Water Supp" ly Plan DMG File No. M-2000-158 / Section 35, T4N, R67W, 6th P.M. Water Division 1, Water District 2 Approval Period: January 1, 2007 through December 31, 2007 Contact phone number for Ms. Melanie Lawrence: 303-455-9589 Dear Ms. Lawrence: Bill Owens Owema Russell Oeosge Executive D'necYOr Hal D. Simpson, P.E. Sate Engineer We have received your letter of October 31, 2006, requesting renewal of the above referenced substitute water supply plan ("SWSP") to cover depletions caused by an existing gravel mining operation. The required fee of $257.00 for the renewal of this substitute supply plan has been submitted (receipt no. 3610512). The original supply plan was approved on April 30, 2001 and was most recently renewed on December 13, 2005. Plan Operation This plan seeks to replace depletions resulting from mining at the S&H Mine Gravel Pit ("S&H Pit") operated by Platte Sand and Gravel LLC. The depletions that result from the mining operation are evaporation, water lost in mined product, concrete belching and dust suppression. During 2006 Platte Sand and Gravel began construction of a slurry wall liner around Sharkey's Lake as shown in attached Figure 1. It is projected that the liner would be completed by the end of October 2006 at which time the 90 day liner test will be conducted. Should the liner pass the 90 day test, Platte Sand and Gravel will begin dewatering the lined area. The water confined within the slurry wall lining will be pumped directly to the South Platte River to allow dry mining. If the slurry wall fails the 90 day test, mining and dewatering of the area will not begin until the appropriate repairs have be made and the 90 day test is successfully completed. If the liner is approved prior to dewatering at the site and all water from the dewatering operation is pumped to the South Platter River without consumption, there will be no augmentation requirement for the dewatering pumping.