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• POWDERHORN COAL COMPANY • <br />North Decline <br />Pond No. 7 <br /> <br />= 18" CMP <br />Emengercy Spillway <br />ew <br />Scale 1'=20' <br />Depths relative to each other <br /> <br />Surface Area (Acres) <br />0.000 <br />0 r- <br />1 <br />0.020 0.040 0.060 0.080 <br />Emergency Spillway <br />Y <br />d <br />G1 <br />L <br />n <br />v <br />v <br />7 <br />Runoff Storage 0.233 A.F. <br />DEC 2 81992 <br />CIVr:iIL~P ~F <br />MINcFiALfi F. ;~V~., r,r <br />0.100 0.120 <br />Design Runoff Storage 0.230 A.F. <br />Design Sediment Storage 0.028 A.F <br />Max. Sediment Level Total Design Storage 0.258 A.F <br />hteasured Capacity 0.273 A.F. <br />Sediment Storage (10-27-92) <br />0.040 A.F ~ As built htax Runoff Level 2. 1' <br />_~ "','~ As Built Max. Sed. Level 4.9' <br />As Built Bottom 6.7' <br />~~ ~ ~~. ~~ <br />~~,~- /2-IS y2 <br />N~ <br />