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j w ~. <br />}';4i~ <br />PEAK WATER RUN-OFF ON UP-SLOPE AREAS ' <br />Watershed area d 35 acres <br />Using 2.25 inches precipitation for a 10 year, twenty four hour <br />storm event. <br />0.19 acre feet water = 2.25 inches water <br />0.19 x 80 - 6.65 acre feet water <br />This run-off will be diverted directly to the meadow. <br />DIVERSIONS: <br />t <br />~1 <br />Overland low from undisturbed areas draining into the meadow Twill be ` ,~Y( <br />ay;•~= <br />diverted away from the disturbed area by means of temporary ditches, ',to min- ' ~;.'.~' <br />I r ~+,: <br />imize erosion and to reduce the volume of water flowing into the sedimentation ;,E' <br />pond. • <br />• These diversion ditches will be constructed to safely pass therun-off 46~~ <br />?.;;.{.. <br />from a ]0 year, twenty four hour storm event. ANN HALDRIGE has supplied the <br />BLUE FLAME COAL COMPANY with the needed information to construct these div- <br />ersions as they conform to Division specifications. They call for a trap- <br />ezoidal ditch design that reduces water velocities. These recommendations will <br />be followed. See attached letter from ANNE BALDRIGE to PETER O'CONNOR. <br />The NPDES point source discharge permit has been applied for. See <br />attached copy. <br />We request that upon completion, the Division inspect the diversion <br />ditches to evaluate what channel protection may be necessary. <br />The same design will be used in constructing the diversion ditches <br />into the sedimentation pond. See ANtiE BALDRZGES' letter to PETER O'CONNOR. <br />CJ <br />