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South Platte Combined Replacement Plan March 1, 2017 South Platte Mainstem Page 8 of 19 Replacement Sources Projected 2017 Yield (acre-feet) Comments Westminster 1998 265.24 Available throughout the year -perpetual lease; 265.24 acre-feet proposed to be used in 2017 Westminster Annual Lease 120 Annual lease with Westminster Thornton Effluent 10.53 November - March only Fulton Ditch 113.11 96 shares total; 62 to be used in 2017 Brighton Ditch 226.90 1.038 shares total Note: Projected 2017 yields may vary from previous estimates of the net yield due to the computed return flow obligations based on the previous year's actual water deliveries. 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 (averaging 16.89 acre-feet per month) and an additional 0.17 cfs every day from October 1 to June 30 during each year (averaging 10.25 acre-feet per month) at the outfall of the Metro Wastewater Treatment Plant. The lease provides 294.79 acre- feet annually, of which 265.24 acre-feet are anticipated to be utilized in this SWSP. (The remaining 29.55 acre-feet are reserved for use in case no. 2007CW198. ) Westminster Annual Lease Pursuant to a March 4, 2009 Consumable Water Lease Agreement with the City of Westminster, Aggregate may lease up to 519 acre-feet of consumable water annually, with a minimum lease of 150 acre-feet per year unless changed by mutual agreement between the parties. The agreement is valid through December 31, 2019. Deliveries under this lease are available from November 10th through March 20th from either the Metro Wastewater Treatment Plant or the Big Dry Creek Wastewater Treatment Plant. For 2017, Aggregate and Westminster have agreed to a total annual delivery amount of 120 acre-feet. A copy of the proposed 2017 delivery schedule, dated October 18, 2016, is attached. For this SWSP, transit losses were assessed assuming deliveries will be from the Big Dry Creek Wastewater Treatment Plant. Notice must be provided and approval made by the water commissioner at least 48 hours prior to the release of replacement water, or as required by the water commissioner, and must identify which source the replacement water will originate from (the Metro Wastewater Treatment Plant or the Big Dry Creek Wastewater Treatment Plant) to allow confirmation of release and that water was delivered. Thornton Lease Aggregate has a perpetual lease of 10.53 acre-feet of fully consumable effluent from the City of Thornton, which will be released from the Metro Wastewater Treatment Plant at a rate of 0.035 cfs daily from November 1 st through March 31 St. Fulton Ditch Aggregate owns a total of 96 shares in the Fulton Ditch Company, consisting of 62 shares obtained from Cooley Gravel, 22 shares from CAMAS, 6 shares from C&M. Aggregates, and 6 snares from Hill ft Peterson. For 2017, Aggregate intends to utilize their 62 Cooley Gravel shares for replacement under this SWSP. (The 22 CAMAS shares, 6 ChM, Aggregates shares, and 6 Hill It Peterson shares will be leased to others for irrigation purposes). Prior to 1977, the 62 Cooley Gravel shares were used in two blocks: 30 of the shares were owned by the Montandon Trust and used for the irrigation of 48.7 acres, and 32 shares were owned Office of the State Engineer 1313 Sherman Street, Room 821, Denver, Co 80203 P 303.866.3581 www.water.state.co.us of ('01 OP o