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• reclamaCio^. Initially, most o[ that incrennc~l 2cud <br />would be retained in the soils and alluvium along <br />Foidel Creek, Eventunll}', however, most of this <br />increased load would probabl,: pass through the drain- <br />age net and reach the Colorado pivcr. <br />Current dissolved solids load in the Colorado Ri•:er <br />! downstream from Hoover Dam is about 8,975,800 tens <br />I annually, and dissolved solids concentration ave.=ges <br />about 681 mg/1. Increasing that amount by 5.0 [o::s/yr <br />would represent an increase in load of only O.CC; <br />' percent and an increase in dissolved solids concan- <br />tration of only 0.04 mg/1. Small as this percent <br /> change is, the salinity problem in the lo~:~er Colorado <br /> <br /> River system is such that any increase in load and <br /> <br /> consequent incr ease in dissolved solids concentration <br /> <br /> is regarded as a significant impact to the use of <br />!. <br />this water downstream. <br />b. Surface idater <br />All existing drainage courses would be removed within <br />1 the mined areas and would be replaced by channels <br />constructed in spoil materials and surfaced by <br />i <br />replaced spoils. Re-establishment of stable charnels <br />I is required by P,egulations 30 CI'R 700. Re-establishment <br />1 <br />of channels that would be as stable as chose now <br />existing would be.difficult, however, if [ire present <br />} 125 <br />