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~~ .. <br />;~ MOUNTAIN COAL COMPANY <br />WEST ELK MINE <br />Quarterly Pond Inspection Report <br />Somerset, Gunnison County, Colorado <br />Date: March 29. 1996 Quarter: <br />Location: West Elk Mine Inspector: <br />Pond IdentiScation <br />Type of Pond <br />Sediment Level <br />Water Level (Approx.) <br />Outflow <br />Features <br />Page I of 2 <br />MB-l South MB-I North MB-2R MB-3 MBA <br />Sediment Sediment Sediment Sedunent Sediment <br />0% 0% 10% 2% 10% <br />75% Full 75% Full 70% Full 40% Full ---- <br />0 0 0 0 0 <br />Problem <br />Comments <br />Erosional: <br />Rills & Gullies on Embanlanent Yes No <br />/ <br />Inadequate Vegetation / <br />Outlet Channel Erosion / <br />Burrows / <br />Other / <br /> <br />Structural: <br />Differential Settling Yes No <br />/ <br />Cracks or slides / <br />Seepage / <br />Other / <br /> <br />Appurtenant Stmctures: <br />Defective Spillways Yes No <br />/ <br />De-watering Device Clogged / <br />Faulty Gates, Bathes, Pumps / <br />Other / <br /> <br />Additional Comments: <br />The WEM mine site experienced a >10-Year, 24-Hour rainfall on snowpack event February 2l, 1996. Ponds were full, <br />however, only MB-2R discharged through the principal spillway. No outflow was observed at the time of this inspection. <br />Ac[ion Required or Needed: <br />Intensive pond management to receive and tmzt increased pond inflow fr~o~m ~Z~~~ mine inflow discharge. <br />P"Oq.P00 RECisll <br />/ ^ : v -~ <br />~ : az 228! 5 ~ ~ <br />a <br />A ~ <br />i <br />o~ . ~, <br />i <br />tt~ s~~NAtENG. <br />