2011-03-21_HYDROLOGY - M1994027 - Laserfiche WebLink

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Jared Dains South Platte Combined Replacement Plan March 21, 2011 Page 10 plan since the replacement water is not required. However, Aggregate may use the sources in future plans to supplement the current augmentation water. South Platte River Replacement Sources Projected 2011 Yields acre-feet Comments Centennial 30.0 Available throughout the year Westminster 1998 294.79 Available throughout the year-perpetual lease Westminster Annual Lease 185.0 Annual Lease Thornton Effluent 10.53 November - March only Fulton Ditch 242.23 96 Shares total Brighton Ditch 196.01 1.323 Shares total Old Brantner Ditch 0.0 11 shares total; not proposed in 2011 Centennial Lease Aggregate conveyed water rights in exchange for a lease of augmentation water in an agreement with Centennial Water and Sanitation District in 1996. The agreement requires Centennial to provide Aggregate 30 acre-feet of fully consumable water each year. The rate of delivery for the 30 acre-feet cannot exceed 0.5 cfs, but can be taken at any time throughout the year. Westminster 1998 Lease The 1998 effluent lease with the City of Westminster is a perpetual lease that provides 0.28 cfs of fully consumable water every day of each year (average 16.89 acre-feet per month) and an additional 0.17 cfs every day from October 1 to June 30 during each year (average 10.25 acre-feet per month). The lease provides 294.79 acre-feet annually. Westminster Annual This lease is in lieu of the 1999 conditional lease with the City of Westminster that has expired. A copy of the 2011 lease from the City of Westminster for 150 acre-feet was provided to this office with the SWSP request. Aggregate is in the process of requesting an additional 35 acre-feet from Westminster, for a total of 185 acre-feet. The Applicant shall provide a copy of the additional lease of 35 acre-feet with the City of Westminster by October 31, 2011 for the fully consumable replacement water to replace depletions from the operation of the gravel pit sites included in this plan. The Applicant shall provide a copy of the lease to the SEO, division engineer, and water commissioner. If a lease is not provided by October 31, 2011, this plan shall expire and all use of water under this SWSP must cease immediately. Under this lease, the City, at its discretion, can make replacements at either Metro Wastewater Treatment Plant or the Big Dry Creek Waste Water Treatment Plant. The lease provides 185.0 acre-feet annually. Thornton Lease Aggregate has leased 10.53 acre-feet of fully consumable effluent from the City of Thornton, which will be released from the Metro Wastewater Treatment Plant from November 1 through March 31 st. Fulton Ditch The historic use of the 96 Fulton ditch shares yields 235.88 acre-feet of water during April through September while generating 67.75 acre-feet of return flow obligation during October through March. This quantification is based on the technique used in the March 24, 1999 approval for the Fulton Lakes Pit, where the historic consumptive use values were determined using an analysis