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• <br />Section 779.16 (a) Continued. <br />Surface Water Drainage Systems: Water Quality <br />level by <br />vious inin~ing. C <br />f4~e general, area <br />Water Quality Dat <br />066194 0,, surface <br />activitie~contai <br />am nts of <br />Statio 0661 <br />ty in t general <br />cultural d elopm~ <br />e rations ~if~ <br />~~~~ <br />From analyses of <br />er in t!I <br />u~st Iy cal <br />same chemfc` charact <br />of magnesium, sulfate <br />sulfate ions. amples <br />>_am rom mining acti ti <br />ics, wi slightly highe <br />nitrogen. <br />trea~n~f~om mining <br />exhibit <br />Mine Plan Area <br />Surface water quality in the mine plan area is variable and depends <br />on several factors: source, intensity, and duration of runoff; <br />precipitation and evapotranspiration rates; watershed elope, soil <br />type, configuration and vegetative cover; and season. Therefore, <br />surface runoff from undisturbed and disturbed areas can be expected <br />to exhibit broad ranges in concentrations of dissolved and suspend- <br />ed constituents. Kerr Coal conducted a comprehensive baseline <br />surface water sampling program in the mine plan area in the spring <br />of 1980. See Table 14, Kerr Mine Area Surface Water Quality Data. <br />Analyses of samples taken twice per month at 20 different sample <br />sites have been summarized. Tn general, the ephemeral and inter- <br />mittent streams in the mine plan area contain water of the calcium- <br />bicarbonate type which is alkaline and high in suspended load. <br />Tipple Area <br />The surface water quality of the tipple area is not as variable as <br />. that of the mine plan area due to the perennial nature of the local <br />drainage system. Rowever, the quality of water in the tipple area <br />•ea a affected at the base- <br />, exi ting roads and pre- <br />~nd t ce constit ents in <br />~~,, 13, US Canadian iver <br />my~les taken USGS Stat n <br />779-42 <br />