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Mr. Jared Dains /.Applegate Group, Inc. 1499 West 120 Avenue, Suite 200 Denver, CO 80234 -2728 DEPARTMENT OF NATURAL RESOURCES MAC, S W-S f DIVISION OF WATER RESOURCES October 11, 2011 Re: SerFer Pit Subsititute Water Supply Plan (WDID No. 0302534) DRMS File No.'M- 2008 -006 (WDID No. 0303028) Section 24, T6N, R68W of the 6 P.M. Water Division 1, Water District 3 Approval Period: July 28, 2011 through March 31, 2012 Contact Phone Number for Mr. Dains: 303 - 452 -6611 Dear Mr. Dains: Plan Operations Depletions John W. Hickenlooper Governor Mike King Executive Director Dick Wolfe, P.E. Director /State Engineer 0 T 112011 Mining and Safety Min This letter is in response to your letter dated July 28, 2011 on behalf of Connell Resources, Inc. (Applicant) requesting renewal of the above referenced substitute water supply plan (SWSP) for the SerFer Pit to cover depletions caused by gravel mining operations in accordance with § 37 -90- 137(11), C.R.S. The required renewal fee of $257 has been submitted (receipt no. 3651654). This plan seeks to replace depletions resulting from the mining at the SerFer Pit. The depletions that result from the proposed dry- mining operation include evaporation, dust control, and water lost in mined product. The Applicant has constructed dewatering trenches to allow for dry- mining and to reduce the evaporative losses associated with the operation. The water is pumped to settling ponds before being discharged to the Cache la Poudre River. SerFer Pit mining operations began in January 2011 and is expected to last approximately 4 years. Once reclamation•is complete, a lined reservoir will be created and will have a total surface area of approximately 20 acres. The proposed replacement source is excess credits resulting from a recharge project at the Timnath - Connell Pit (M- 1999 -050). This plan describes the water uses from January 1, 2011 through March 31, 2012 for the SerFer Pit. It is estimated that 184,800 tons of aggregate will be mined during this approval period, resulting in 2.72 acre -feet of water lost in the mined product, and 1.25 acre -feet of water to be used for dust control. Gross evaporation at this site is estimated to be 40 inches per year with an effective precipitation amount of 0.92 feet (11 inches). For the 0.5 acres of ground water exposed at this site, annual net evaporation is 1.31 acre -feet per year. During the period of January 1, 2011 through March 31, 2012 the net evaporation is 1.37 acre -feet. (See attached Tables 1 and 2.) Office of the State Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 www.water.state.co.us