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<br />As material is excavated, it will be washed on site. The water retained in this mat rial is <br />considered as consumptive use. The anticipated amount of material that will be fined and <br />washed each year is estimated at 100,000 tons. Assuming 4 percent moisture con ent by weight <br />as suggested by the State Engineer's Office, the total annual depletion due to wat retained in <br />product is 2.9 acre-feet. <br />In addition, water use at the site will include dust control. This is water applied to haul roads and <br />stockpiles. It is estimated that one load from a 3000-gallon capacity water truck ice a day <br />(Monday through Friday) for nine months is required for dust control. This result in a <br />consumptive use of 3.6 acre-feet per year. <br />The total annual consumptive uses associated with the mining operations are as fo~lows: <br />Evaporation 34.9 acre-feet <br />Moisture Retained in Product 2.9 acre-feet <br />Dust Control 3.6 acre-feet <br />Total 41.4 acre-feet <br />Water Rights <br />The landowner of the Challenger Pit, AI Challenger, will be providing the necess water rights <br />for the operation. The landowner owns 20 shazes of the Hill and Brush Ditch. Th proposed <br />mining operation will take approximately 34 acres of historically irrigated acreage ut of <br />production. The 20 shazes of Hill and Brush Ditch were historically used on a tota 61.5 acres. <br />The acreage taken out of agricultural production accounts for 55.3% of the historic irrigated <br />acreage (34 acres/61.5 acres). Therefore, 11 shazes of the 20 shazes of Hill and B sh Ditch will <br />be made available for augmentation. The average yield of the 11 shazes owned by Challenger is <br />165.5 acre-feet annually. <br />For the purpose of calculating the average annual consumptive use of the Hill and rush Ditch <br />shares, a 20% ditch loss and a 60% irrigation efficiency were assumed. This resul in a <br />consumptive use of approximately 7.2 acre-feet per shaze. <br />The Hill and Brush Ditch shares and leased water from the City of Loveland will used to <br />augment during mining. An application to temporazily change [he use of the Hill d Brush <br />shares from agricultural use to augmentation will be submitted to the State Engine is Office. <br />117 AmenAmenl <br />Page /0 of l3 <br />