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<br />Plan View <br />Scale 1"=20' <br />Depths relative to each other <br />POWDERHORP! COAL COMPANY <br />North Decline <br />East Sump <br />0.00 <br />0 r. <br />1 <br />~ 2 <br />v <br />a <br />r 3 <br />c <br />a <br />0 <br />.;- . <br />~~,._ ,A~ ir: <br />~' ~ ' -' <br />~. <br />...r ~. <br />T; ~~~ <br />~~~=~~9zc_ 1 <br />4AY^"' <br />DEC 2 81992 <br />r~L\I~PiHL:..:. ...~ .. ~ .. <br />Sump Surface Area (Acres) <br />0.020 0.040 O.ObO <br />Freeboard 1.0' <br /> <br />0.080 <br />Original Grade <br />Storage Capacity Design Runoff Storage 0.080 A.F. <br />0.087 A.F. Measured Capacity 0.087 A.F. <br />(10-27-92) <br />As built Max. Storage Level 1.A' <br />As built bottom 3.6' <br />