Laserfiche WebLink
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 /> June 19, 2017 <br /> <br />Todd Williams, P.E. <br />Williams and Weiss Consulting, LLC <br />5255 Ronald Reagan Blvd., Ste. 220 <br />Johnstown, CO 80534 <br /> <br />Re: G.L. Pit Substitute Water Supply Plan (WDID 0302518, Plan ID 5369) <br />G.L. Gravel Pit, DRMS Permit No. M-1981-022 (WDID 0303008) <br />NW¼ Section 3, T7N, R69W, 6th P.M. <br />Water Division 1, Water District 3, Larimer County <br /> <br />Approval Period: June 1, 2017 through May 31, 2018 <br /> Contact Information for Mr. Williams: 303-653-3940; tlwwater@msn.com <br /> <br />Dear Mr. Williams: <br />We have received your letter dated May 3, 2017, requesting renewal of the above- <br />referenced substitute water supply plan (“SWSP”) on behalf of Connell Resources, Inc. (“Connell” <br />or “Applicant”). This SWSP is requested in accordance with § 37-90-137(11), C.R.S., to cover <br />depletions caused by an existing sand and gravel mining operation known as the G.L. Pit. The <br />required fee of $257.00 for the renewal of this substitute water supply plan has been submitted <br />(receipt no. 3679651). This substitute water supply plan was initially approved on March 26, 1993 <br />and was most recently renewed on June 1, 2016 for operations through May 31, 2017. <br />Plan Operation <br />Mining at the G.L. Pit has been completed for several years and backfilling of the pit was <br />completed in October of 2016. There will be no consumptive use of ground water at the site during <br />this plan period. Depletions are limited to lagged depletions resulting from past evaporation from <br />exposure of ground water at the site. <br />Depletions <br />Net evaporative depletions from past ground water exposure were calculated using a gross <br />annual evaporation of 39.0 inches from the exposed water surface, with a credit of 8.6 inches for <br />effective precipitation. A monthly breakdown of past consumptive use at the site is shown in the <br />attached Table 1. Depletions were lagged to the Cache la Poudre River using the Alluvial Water <br />Accounting System (AWAS) stream depletion model developed by the Integrated Decision Support <br />Group with the following assumptions: <br /> Distance from the gravel pit centroid to the river (X) = 1,900 ft <br /> Alluvial aquifer width (W) = 5,800 ft <br /> Specific Yield (S) = 0.2 <br /> Transmissivity (T) = 160,000 (gpd/ft)