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The total annual consumptive uses associated with the mining operations are as follows: <br />Evaporation (acre-feet) 17.89 <br />Moisture Retained in Product (acre-feet) 29.43 <br />Dust Control (acre-feet) 2.00 <br />Total (acre-feet) 49.32 <br />The maximum annual evaporation from the site after mining has been completed will be <br />approximately 265 acre-feet. As reclamation progresses, portions of the reclaimed pit will <br />gradually be backfilled, thereby reducing the total amount of exposed surface area. <br />Water Rights <br />Replacement water is currently, and will continue to be provided under Aggregate Industries' <br />South Platte Combined Replacement Plan that has been accepted and approved by the State <br />Engineer's Office. Sources of water include historic consumptive use credits from the Fulton <br />Ditch, water from the City of Westminster, and other water currently available to Aggregate <br />Industries under lease agreements. Under the Combined Replacement Plan, replacements are <br />made to the South Platte River at various locations including the Metro Wastewater Treatment <br />Plant outfall structure located upstream of the property. Transit loss associated with the <br />replacement water sources is assumed to be 0.5% per mile. Sources of water currently available <br />to Aggregate Industries are described as follows: <br />• 0.28 cfs of fully consumable water every day of the year delivered in <br />perpetuity at the confluence of Cleaz Creek and the South Platte River in <br />Adams County, Colorado. <br />• In addition to the amounts identified in the above paragraph, an additional <br />0.17 cfs of fully consumable water every day from October 2 until June 30 <br />delivered in perpetuity at the confluence of Clear Creek and the South Platte <br />River in Adams County Colorado. <br />• Water attributable to Aggregate's ownership of Fulton Ditch shares. <br />• A lease with Silver Heights Water and Sanitation District for fully <br />consumable wastewater delivered at the Plum Creek Wastewater Treatment <br />Plant. <br />• Fully consumable water from the Centennial Water and Sanitation District <br />delivered at Little Dry Creek or Plum Creek, from McLellan Reservoir, or <br />from Centennial's Marcy Gulch Wastewater Treatment Plant. <br />To the extent the water is available from the above-identified sources, it will be used to replace <br />out ofpriority stream depletions for mining and reclamation. <br />Platte Valley Oper¢k¢n <br />DMG 172 Permit Amendment <br />Page 15 <br />