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John W. Hickenlooper <br />Governor <br /> <br />Robert Randall <br />Executive Director <br /> <br />Dick Wolfe, P.E. <br />Director/State Engineer <br /> <br /> <br /> <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 /> <br /> <br />March 31, 2017 <br /> <br />Mr. Todd Williams, P.E. <br />Williams and Weiss Consulting, LLC <br />5255 Ronald Reagan Blvd, Ste. 220 <br />Johnstown, CO 80534 <br /> <br />Re: Timnath-Connell Substitute Water Supply Plan (WDID 0302526, SWSPID 3615) <br /> Timnath-Connell Pit, DRMS File No. M-1999-050 (WDID 0303018) <br /> Section 3, T6N, R68W, 6th P.M. <br /> Water Division 1, Water District 3, Larimer County <br /> <br /> Approval Period: April 1, 2017 through March 31, 2018 <br /> Contact Phone Number for Mr. Williams: 303-653-3940 <br /> Contact Email address for Mr. Williams: tlwwater@msn.com <br /> <br />Dear Mr. Williams: <br /> This letter is in response to your letter dated February 14, 2017 in which you request <br />renewal of the above referenced substitute water supply plan (SWSP) on behalf of Connell <br />Resources, Inc (Applicant) in accordance with § 37-90-137(11), C.R.S. to cover depletions caused by <br />gravel mining operations at the Timnath-Connell Pit (M-1999-050). The required fee of $257 has <br />been submitted (receipt no. 3678417). The most recent SWSP renewal was approved on April 14, <br />2016 and expires on March 31, 2017. <br />SWSP Operation <br />The Timnath Pit is located in Section 3, Township 6 North, Range 68 West of the 6th P.M., <br />south of the town of Timnath and west of the Poudre River. Mining operations at the Timnath- <br />Connell Pit during this plan period will consist of evaporation from ground water exposed at the site <br />and dust control. The reclamation activity proposed to occur at the Timnath-Connell Pit during this <br />plan period is limited to backfilling of previously mined areas. No additional mining of sand and <br />gravel is proposed to occur at this site during this plan period. Replacement of depletions at the <br />site will be made via delivery of Box Elder Ditch Company shares to an on-site recharge pond. The <br />final reclamation plan for the site calls for a lined reservoir for the area west of the Box Elder Ditch <br />and backfilling of the mined area to the east of the Box Elder Ditch. An 8.10-acre recharge pond <br />and a 2.74-acre unlined pond will remain on the site after reclamation. <br />Depletions <br />There are 6.03 acres of exposed ground water at the site and an 8.10-acre recharge pond. <br />Ground water is exposed at the site in 0.15 acres of dewatering trenches, a 0.53-acre dewatering <br />sump, a 2.61-acre pond used to provide water for dust control purposes, and a 2.74-acre pond (Map <br />1). Evaporative depletions were calculated using a gross annual evaporation of 39 inches, with a <br />credit of 10.1 inches for effective precipitation [based on an average annual precipitation for the