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have settled out , the water is released into the Coal Basin <br /> surface drainage system. See Appendix III-E-4 , Mine Discharge <br /> Monitoring Reports and Table III-E-2 , Mine Discharge Rates . <br /> 3 . Surface water <br /> a . Introduction <br /> This section describes the Coal Basin permit <br /> and adjacent areas surface water flow and drainage charac- <br /> teristics , quality, use, rights and control techniques to <br /> mitigate possible impacts resulting from mining operations . <br /> Precipitation and water flow data has been <br /> obtained from the NOAA, USGS and USFS records , and from <br /> continuous recording stations located in the area . <br /> A USGS regression analysis technique was used <br /> to define <br /> - stream-aquifer flow relationships <br /> - solute travel time in selected streams <br /> - flood profiles along stream channels <br /> - areas that are subject to inundation by floods of <br /> selected frequencies <br /> - stream flow and stream channel parameters such as <br /> velocities, depths , bed material and water quality <br /> and <br /> - basin characteristics that have significant influence <br /> on the flow and which can be used to project <br /> stream flows using regression analysis techniques . <br /> 1.4 <br />