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Col 0 IfQ 0 o 1876 °"`N DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER RESOURCES April 21, 2014 Mr. Todd Williams, P.E. Williams and Weiss Consulting, LLC 5255 Ronald Reagan Boulevard, Ste. 220 Johnstown, CO 80534 Re: SerFer Substitute Water Supply Plan (WDID 0302534) SerFer Pit, DRMS File No. ,M- 2008 -006 (WDID 0303028) Section 24, T6N, R68W, 6th P.M. Water Division 1, Water District 3, Larimer County Approval Period: April 1, 2014 through March 31, 2015 Contact Phone Number for Mr. Williams: (303) 653 -3940 Dear Mr. Williams: John W. Hickenlooper Governor Mike King Executive Director Dick Wolfe, P.E. Director /State Engineer APR ;" ? 2014 Division of Reclamation, Mining & Safety This letter is in response to your letter dated February 14, 2014 in which you request renewal of the above referenced su fltute water supply plan (SWSP) on behalf of Connell Resources, Inc. (Applicant) in accordance with S 37 -90- 137(11), C.R.S. to cover depletions caused by gravel mining operations at the SerFer Pit (M- 2008 -006). The required renewal fee of $257 has been submitted (receipt no. 3663652). The most recent SWSP renewal was approved on March 27, 2013 and expires on March 31, 2014. Plan Operations This plan seeks to replace depletions resulting from mining operations 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. Due to unfavorable economic conditions a precise end date is unknown. 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, WDID 0303018) and reusable water leased from the City of Fort Collins. Depletions Ground water is exposed at the site in a 0.23 acre dewatering trench (3 ft wide x 3,340 ft long), a 0.05 acre dewatering sump, and two settling ponds of 0.14 and 0.16 acres. Evaporative depletions were calculated using a gross annual evaporation of 40 inches, with a credit of 9.0 inches for effective precipitation (based on an average annual precipitation for the Windsor weather station). For the total of 0.58 acres of ground water exposed at this site, net evaporation is equal to 1.50 acre -feet per year (see attached Table 1). You have estimated that 240,000 tons of aggregate will be mined during this approval period. The material will be mined below the ground water table in a dewatered state and not washed; Office of the State Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 www.watenstate.co.us