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<br />Through a long-term lease with the City of Englewood, Centennial has a share of the storage <br />(3,900 acre-feet) in McLellan Reservoir. Centennial is currently developing storage in gravel pits <br />(South Platte Reservoir) near C-470 and the South Platte River. <br /> <br />Table C-.6 sLlmmarizes the surface water supplies available to Centennial. <br /> <br />Table C-6 - Centennial Surface Water Rights <br /> <br /> Yield (Acre-feet per year) <br />Stream/ Storage Water Right Average Year Dry Year <br />Lower Plum Creek Ditch (1870) W -6072 450 0 <br />Lower Plum Creek Ditch (1928 W -6072 238 0 <br />- 60) <br />Augmentation Plan and 85CW4l5 Exchange limited to 62 cfs with 13. I cfs <br />Exchange of reusable effluent limitation for effluent <br />and lawn irrigation return flows <br />Chatfield Conditional Storage 84CW41l 6000 acre-feet for storage in Chatfield <br /> pool or South Platte Reservoir. <br />South Platte Diversion 88CW222 Diversions varying between 24 and 93 <br /> cfs for points of diversion and storage at <br /> McLellan and South Platte Reservoirs. <br />South Platte Diversion 95CW239 Diversion of7-l1 Gulch flows and 57 cfs <br /> through Last Chance No.2 and Nevada <br /> Ditches with storage in South Platte <br /> Reservoir. <br /> <br />Centennial also has a series of water supply agreements for surface water supplies. These are <br />summarized in Table C-7. <br /> <br />Table c-7 - Centennial Water Supply Agreements <br /> <br />Source <br /> <br />Yield (Acre-feet per year) <br />Average Dry <br />2,500 1,500 <br /> <br />Englewood Water Supply <br />Agreement <br />Englewood Ranch Creek <br />Agreement <br />Denver Raw Water Lease <br /> <br />2,320 <br /> <br />o <br /> <br />1,000 <br /> <br />1,000 <br /> <br />Aquifer Storage and Recovery <br /> <br />Centennial has established a plan to inject treated water into the Denver Basin aquifers beneath <br />Highlands Ranch to store excess surface water, reduce mining of the aquifers and to maintain <br />groundwater levels. Currently, eight wells are equipped for injection into the Arapahoe aquifer, <br />three in the Denver formation and one in the Laramie-Fox Hills aquifer with a ma.;-dmum <br />injection capacity from all wells of 5.2 mgd. Ultimately, all Centennial wells are planned to be <br />equipped for injection with a potential injection rate of 15 mgd. Based on operating rules and <br />practices, Centennial will typically recharge the Denver Basin aquifers in winter, spring and fall <br />months. <br />