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• <br />Results <br />The University of Arizona ran the HYMO Program and obtained the results as <br />shown in the following tables (Tables 7-6-I through Table 7-6-6) for the 10, 25, and 100 <br />year-24-hour precipitation events on premining and post-mining contours. The tables <br />show the peak runoff volume, peak discharge, and peak velocity for each reach of all of <br />the watersheds at the Seneca mine on the premining and post-mining topography. <br />With the mining and recontouring of the surface within the permit boundaries, <br />Seneca Coal, LTD. is not adversely affecting the peak velocities in the various reaches; <br />and in fact, slightly reducing the overall average peak velocities and peak runoff <br />volumes. <br />• <br />• <br />7-6-~-~~ Revised 5/27/811 <br />