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h� DEPARTMENT OF NATURAL RESOURCES 0, DIVISION OF WATER RESOURCES 2 * 7+ � John W.F-Iickenlooper 'F 18 76 i`;' Governor ---" December 21, 2015 Mike King Executive Director Mr. Todd Williams, P.E. Dick Wolfe,P.E. Williams and Weiss Consulting, LLC Director/State Engineer 5255 Ronald Reagan Boulevard, Ste 220 Johnstown, CO 80534 RE: Kauffman No. 1 Substitute Water Supply Plan (WDID 0402530) Kauffman No. 1 Pit, DRMS No. M-1978-327 (WDID 0403009) RECEIVED Sections 20 and 21, T5N, R68W, 6 .M. Water Division 1, Water District 4, Larimer County DEC 3 0 2015 Approval Period: January 1, 2016 through December 31, 2016 t)MSIONOFRE-TION, Contact Phone Number for Mr. Todd Williams: 303-653-3940 �ININGAI�MFETY Dear Mr. Williams: We have reviewed your letter dated November 13, 2015 requesting renewal of the above referenced substitute water supply plan for a sand and gravel pit on behalf of Jake Kauffman and Son, Inc. The required fee of $257.00 for the renewal of this substitute water supply plan has been submitted (receipt number 3672360). The original substitute water supply plan was approved on April 6, 1992 and it was most recently approved on December 18, 2014 for operations through December 31, 2015. SWSP Operation The Kauffman No. 1 Pit (WDID 0403009, well permit no. 42901-F) is located in Larimer County in part of the E'h of Section 20 and the NW'/4 of the SWY4 of Section 21, Township 5 North, Range 68 West of the 6th P.M. Active mining at the site has ceased and the site is currently undergoing reclamation. The site contains three unlined ponds of approximately 24.7 acres, 9.1 acres, and 1.1 acres, all exposed to the atmosphere prior to January 1, 1981. As of 2012, all groundwater exposed to the atmosphere after December 31, 1980 has been backfilled so that there are no new evaporative depletions associated with this site. The applicant plans to place additional backfill on the eastern side of the 24.7-acre pond to meet reclamation requirements, which will further reduce the amount of exposed ground water at the site. Consumption of water at the site during this plan period will be Limited to dust control at the site required during reclamation. The replacement water will be supplied by a lease with the City of Loveland. Pursuant to S 37-90-137(11)(b), C.R.S. and 2009CW49, a gravel pit operator or property owner does not need to replace depletions that occur due to evaporation from ground water exposed prior to January 1, 1981 as a result of open mining of sand and gravel, regardless of whether mining continued after December 31, 1980. Previous SWSPs have recognized that 36.2 acres of water surface was exposed at the Kauffman No. 1 Pit prior to January 1, 1981 ("pre-81"). Due to the backfilling at the site and an overall drop in water levels, the pit now has an exposed surface area of 34.9 acres. Per our "General Guidelines for Substitute Water Supply Plans for Sand and Gravel Pits" updated April 1, 2011, pre-81 areas are tied to the physical location at which the groundwater was exposed prior to January 1, 1981 with the exception for areas whose reallocation was approved by the State Engineer prior to Office of the State Engineer 1313 Sherman Street, Suite 818•Denver, CO 80203•Phone:303-866-3581 • Fax:303-866-3589