2009-12-22_HYDROLOGY - M1977436 - Laserfiche WebLink

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, Jared Dains Page 9 South Platte Combined Replacement Plan December 21, 2009 Westminster Annual Lease 92.0 Annual Lease Thornton Effluent 10.53 November — March onl Fulton Ditch 336.42 96 Shares total; no RF owned for 2010 Brighton Ditch 196.01 1.323 Shares total Old Brantner Ditch 1 0.0 11 shares total; not proposed in 2010 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. The Applicant shall provide a copy of the lease with the City of Westminster by October 31, 2010 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, 2010, 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 92.0 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. 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 decreed in case number 82CW393. In this approach, headgate diversions were based on average monthly values for the period of 1976 -1988 and a 10% conveyance loss was assumed as well as a farm efficiency of 50 %. The return flow obligations, which were not addressed in the above decree, were calculated in the previous plan using a SDF value of 270 days and the assumption that all water diverted but not used by the crops is returned to the stream system through deep percolation. The expected consumptive use credit for the 96 Fulton Ditch shares for 2010 has been estimated from a dry-up farm headgate delivery of 3.50 acre -feet per share or approximately 336 acre -feet for the 96 Fulton Ditch shares. Because there is no immediate surface component the return flow obligations were calculated as a percentage of the previous year farm headgate delivery. Since, no Fulton Ditch water was delivered in 2009, there will be no return flows owned in 2010.