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4. There are seven reservoirs in the Rapid Creek Basin . The <br /> Bureau of Land Management has stated , and the Division agrees , <br /> that six will not be affected by coal mining in the area. <br /> Cabin Reservoir may be impacted by subsidence , although mining <br /> in this area is not expected until 2011 , well into the next <br /> century and certainly not in this five-year permit term. <br /> 5. Consumptive use of water at the Roadside Mine consists of <br /> domestic water used at the surface facilities and preparation <br /> plant, mine water used at the preparation plant, applied to <br /> underground roadways , and adsorbed to the coal and refuse, and <br /> water from the Highline Canal used for dust suppression on <br /> surface roads . <br /> Quantities of water consumed at the mine are reported annually <br /> in the Annual Hydrologic Report. Quantities consumed during <br /> water year 1992 were as follows: <br /> Gallons Used Location Used <br /> Domestic Water 1 ,397 ,000 Surface Facilities <br /> 2, 150,000 Preparation Plant <br /> Mine Water 3,350,000 Mining <br /> 3, 150,000 Preparation Plant <br /> 750,000 Underground Roads <br /> Highline Canal 1 , 170,000 Surface Roads <br /> The operator has shown appropriate documentation of right for <br /> water consumption. Domestic water is supplied by Palisade <br /> Domestic Water. <br /> All sediment ponds in the permit area are designed to retain <br /> less than ten acre-feet of water. The largest designed pond is <br /> pond 6 with a maximum capacity of 3.95 acre-feet. This pond <br /> has a primary spillway with a gated valve which allows for <br /> dewatering of the pond as soon as the discharge can meet <br /> effluent limits. Any water that may be detained in the <br /> sediment ponds is not put to any beneficial use . The sewage <br /> treatment lagoons are designed to treat 0.24 acre-feet within a <br /> two-week period. No water rights are required for the sediment <br /> ponds or the sewage lagoons . <br /> Surface Water Quality <br /> Possible hydrologic impacts on quality of surface water due to the <br /> Roadside and Cameo Mines include impacts to: <br /> 1 . Colorado River water due to mine water discharge , and <br /> 2 . Runoff from surface disturbance . <br /> 1 . As discussed in Section B. II .A. of this document, Powderhorn <br /> Coal Company has submitted a report to the Colorado Department <br /> -25- <br />