Laserfiche WebLink
<br />EAST MINE SEDIMENT POND <br />Runoff is referenced ro National Engineering Handbook, 4 Hydrology, P. 9.2 and <br /> P.10.21 <br /> 1.6" storm occurring in 6 hours correlates ro <br /> .90" for paved highway CN 92 <br /> .75" for poor pasture/range CN 89 <br /> .30" for fair woods CN 79 <br /> Areas contributing to the Main East Mine sediment pond <br /> Location Area (Acres) Runoff Volume (Acre Inch) <br /> 2 .50 .3 .15 <br />• 3 .94 .75 .7] <br /> 4A .50 .3 .IS <br /> 4B .49 .3 .15 <br /> 4C .29 .75 .22 <br /> 5 4.25 .75 3.19 <br /> Subtotal 6.97 4.57 <br /> Hiway .41 .90 .37 <br /> TOTAL 7.38 4.94 <br /> Water Area 4.94 acre inch/12 inch/ft = .41 Acre foot <br /> Sediment Area .035 Acre foot/Acre x 6.97 Acre = .24 Acre foot <br /> TOTAL POND .65 Acre foot <br /> 28,314 cu. ft. <br />• Sample Dimensions 84 x 84 x 4 7,056 x 4 <br /> 97 x 97 x 3 9, 409 x 3 <br /> llBxllBx2 13,924x2 <br />