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h:Yhibit A <br />Railroad Loadout Loop Sedimentation Pond <br />Coal Transportation System <br />Western Fuels - Utah, Inc. <br />Design Criteria of Sedimentation Pond <br />1.) Location - SZ NWT, Section 22, T3N, R101W <br />2.) Drainage area equals l,2.5 acres. <br />3.) Reservoir was excavated out oi' virgin soil <br />4.) Storage Capacity is: <br />Elevation 5630.0 2.6 Acre Feet <br />Elevation 5630.5 2.8 Acre Feet <br />Elevation 5633.5 5.0 Acre Peet <br />5.) Discharge Volume is: <br />30" Drop inlet with reservoir at 5633.5 equals 36 cfs. <br />2-30 Culverts with reservoir at Sb33.5 equals 44 ci's. <br />b.) Maximum peak flow for s 100 year 24 hour rainfall is equal to 27 cfs. <br />7.) At elevation 5630.0, three years sedimentation plus storage for <br />runoff' on a 10 year 24 hour rainfall is provided. <br />Construction drawings No. 13617.01-EY-11BY-8 and 13617.01-EY-11CP-2 showing <br />details for the sedimentation pond are attached. <br />