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All groundwater encountered during the mining sequence will be dewatered <br />through the Roadside North and South Portal workings and treated as <br />necessary for discharge into the Colorado River according to existing NPDES <br />permit requirements. <br />Normally, sumps inside the mine are used to settle out sediment prior to <br />discharge. There has been one period of time where mine discharge water at <br />the North Decline outfall 002 was treated in a settling basin on the land surface. <br />However, this portal has been sealed and this extra treatment is not anticipated <br />in the future. <br />There are no springs filed on or within or adjacent to the permit area. The <br />springs shown on Exhibit 17 beyond the southeast corner of the permit <br />boundaries are part of the Town of Palisade's domestic water system and are <br />considered to be outside the adjacent area. These springs discharge from <br />• landslide, land creep, and alluvial deposits. These springs have a pH range of <br />6.8 to 8.3 and a specific conductance of 95 to 1050 wStcm (Brooks, 1986). <br />A spring and seep inventory was done on portions of the permit area west of <br />the Colorado River in the spring of March 1994. There were multiple locations <br />where white chemical deposits were observed which indicate wet spots. These <br />white spots are residue from evaporation of water from springs or seeps. Table <br />7-6 is a listing of flow and field parameters taken at two of the largest sites. <br />These seeps had evaporated within a short distance of where flow was <br />observed. The source of these and other seeps is outcrops of sandstone on <br />steep south or southeast facing slopes. The dip of formations in the area is to <br />the southeast. These sandstone layers are fed by precipitation at the updip <br />exposure of the rock. <br />7-9 (New 311!96) <br />