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<br />Arista Shippy <br />August 2, 2018 <br />Page 2 of 5 <br /> <br /> <br />water. Using an annual gross evaporation of 43 inches per NOAA TR-33, and an effective <br />precipitation of 8.66 inches per year, the anticipated depletion is 30.9 acre-feet annually of <br />evaporation loss from an exposed ground water surface area of 10.8 acres. Effective <br />precipitation was taken as 70% of the average precipitation recorded at the NOAA Fort <br />Lupton climate station. Net evaporation at this site is therefore 34.34 inches per year. <br />The depletions were lagged to the stream using a Glover analysis and assuming a distance <br />from the centroid of the pond to the stream of 1,000 feet, distance to the impermeable <br />boundary of 16,100 feet, transmissivity of 156,000 gpd/ft, and a specific yield of 0.2. The <br />Applicant has provided a monthly schedule of lagged actual depletions to the river system, <br />together with a schedule of replacement requirements (see Table 2). This SWSP accounts for <br />actual depletions determined to accrue to the steam system during this plan period. In total <br />31.0 acre-feet of lagged depletions are expected to accrue to the river annually. <br />Replacements <br />The proposed source of replacement for this pit is water stored during free river and in- <br />priority within Gilcrest Reservoir. This water will be pumped from the reservoir directly <br />to the South Platte River near the same location as depletions from Sharkey’s Pond accrue <br />to the river. Therefore, no transit losses will be applied and there will be no interviewing <br />water rights to be injured. <br />The Gilcrest Reservoir held 1,486 acre-feet of water on April 1, 2016, due to previously <br />approved diversions. The District 2 Water Commissioner approved the diversion of South <br />Platte River water into Gilcrest Reservoir during periods of free river in April 2016, <br />December 2016, January 2017, May 2017, June 2017, September 2017 and October 2017. <br />A total of approximately 364.8 acre-feet of water was brought into Gilcrest Reservoir via <br />two pumps. Releases were made while there was a call on the river as follows: 9.1 acre- <br />feet in September 2016, 4.4 acre-feet in October 2016, 3.9 acre-feet in March 2017, 2.7 <br />acre-feet in April 2017 and 11.0 acre-feet in September 2018. A total of 62 acre-feet of <br />water in storage (31 acre-feet per calendar year) will be used for replacement purposes <br />during this plan period. According to the lease agreement between United Water and <br />Sanitation District (“United”) and Scout dated July 1, 2018, United agrees to lease to <br />Scout up to sixty acre-feet of water every calendar year from Milliken Reservoir, through <br />June 30, 2023. <br />The necessary measurement and recording devices for pumping water into the river were <br />approved by the water commissioner on August 18, 2014. <br />The Applicant is seeking to make slug releases of replacement water each month. Slug <br />releases can only be made on a monthly basis upon prior approval and continued <br />coordination with the water commissioner. The monthly consumptive use and lagged <br />depletions for this plan period are shown in the attached Table 2. <br />Long Term Augmentation Requirements <br />In accordance with the letter dated April 30, 2010 from the Colorado Division of <br />Reclamation, Mining, and Safety (“DRMS”), all sand and gravel mining operators were <br />required to demonstrate to DRMS how they were in compliance with the requirements of the <br />Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of water