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TAIILE 7 <br />SEDIMENTATION POND DATA - PART I <br />REVISED (July 30, 1984) <br /> <br />Item Sedimentation Ponds <br />Sedimentation Pond No. 1 2 3 4 5 ~~ 6 <br />Designation Taylor Gulch Streeter Gulch Work Loadout Stoker <br />- ... Tributary Gulch A Area ..Area Siding <br />Watershed Area <br />Pre-mining (acres) 843 1,424 '419 Nil Nil 14 <br />Past-mining <br />Distrubed (acres) 595 1,049 650 137 26 8 <br />Undisturbed (acres) 499 318 17 0 0 6 <br />Total (acres) 1,094 1,367 667 137 26 14 <br />Precipitation, 10 yr. - 24 hr. (inches) 1.8 1.8 1.8 1.8 1.8 1.8 <br />Runoff Curve No. (CN) 67 67 67 78 40 90 <br />Runoff, Depth (inches) 0.055 0,055 0.055 0.37 0.58 0.58 <br />Volume (acre-feet) 5.01 6:27 3.06 4.22 1.25 0.69 <br />Sediment Yield - 3 years (acre-feet) 0.92 1.07 0.58 0.52 0.32 0.22 <br />Runoff Volume 6 Sediment <br />Yield "' (acre-feet) 5.93 7.34 3.64 9.74 1.57 0.87 <br />Storage Volume Below <br />Emergency Spillway (acre-feet) 8.21 11.77 5.01 17.30 3.78 1.48 <br /><,~ ~~ '~ <br />