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Kim Edwards South Platte Combined Replacement Plan October 23, 2007 Page 7 Leggett-Owens Reservoir Donald J. Sherwood owns 19.6 shares of the Leggett-Owens Ditch and Reservoir company, which Aggregate may use for augmentation pursuant !o the mining lease agreement. During an average year the 19.6 shares represents 60 acre-feet of water and can be released when needed. The consumptive use credit available from the 19.6 shares is estimated at 33 acre-feet, based on a 55% efficiency. The applicant may only utilize the 19.6 shares in this plan at such time as all required measurement and bypass structures have been installed and approved by the water commissioner. Citv of Longmont Lease Aggregate is not proposing to use fully consumable water leased from the City of Longmont in this 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 2007 Yields acre-feet Comments Centennial 30.0 Available throu hout the ear Westminster 1998 294.79 Available throw hout the ear Thomton Effluent 22.42 November- March onl Fulton Ditch 138.43 96 Shares total Bri hton Ditch 204.58 1.323 Shares total Westminster 1999 515.71 November- March onl New Brantner Ditch 0.0 no shares a lied to this Ian Old Brantner Ditch 0.0 11 Shares total, no share a lied to this Ian 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 Thornton Lease Aggregate currently has access to a lease with the City of Thornton for fully consumable effluent from the Metro Wastewater Treatment Plant. The lease provides up to a total of 22.4 acre-feet of fully consumable effluent from November through March. 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