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Colowyo Coal Company <br />573 State Highway 13 <br />Meeker, CO 81641 <br />T 970 - 824 -1573 <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of Environmental Solutions, Inc , P O. Box 2996, Cheyenne <br />Wyoming The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation and the coal <br />permitting process in Colorado, the information contained herein is reasonable and correct to the best of my experience. <br />Note (d) impoundment volumes are estimated from pre - existing as -built surveys, and estimates of accumulated sediment <br />CF2112 2011 <br />Outfall Inspection - Ponds <br />Outfall Point <br />4th Quarter 2011 <br />Year <br />Q`PO0 001111 1/1 4 <br />S' - 32257 2 <br />1 ; <br />t2Izz/ll <br />OA F ........ <br />S iONAL F '` . ‘ <br />TH • A P RSO <br />P.E. No. 32257 <br />001A <br />002A . <br />003A <br />004A <br />005A <br />006A <br />007A <br />008A <br />. 009A <br />,'010A , <br />011A <br />012A <br />Other: <br />Other <br />Other <br />.Other <br />Other <br />Other <br />Streeter <br />Sediment 'Pond <br />Work Area : <br />Pond ' <br />Gossard <br />Loadout Pond <br />Gulch A <br />Pond <br />Stoker Siding <br />' Pond , <br />Rail Loop <br />' Pond <br />Prospect <br />Pond <br />.. West Pit . <br />Pond ' <br />Section 16 <br />. Pond <br />East Taylor ,,, <br />' Pond '"' ' <br />West Taylor <br />Pond <br />See. 28 ' <br />Pond <br />Wash say <br />Pond <br />Taylor Pump r <br />Holding Pond <br />Aeration <br />Pond <br />West Overflow <br />Pond <br />East Overflow <br />Pond ' <br />Washbay <br />Sediment .Sump <br />Inspection Date <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/30/2011 <br />11/8/2011 <br />11/8/2011 <br />11/8/2011 <br />11/28/2011 <br />11/8/2011 <br />11/28/2011 <br />11/28/2011 <br />11/28/2011 <br />11/28/2011 <br />Inspector <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Chip Brown <br />Rule 4.05.9 (15) <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />fa <br />Does pond exhibit <br />structural weakness, <br />erosion, or other <br />hazardous conditions'? <br />(bl <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Quarterly/ <br />Annual <br />Inspections <br />Monitoring Procedures <br />and Instrumentation <br />(c1 <br />6583 0 ft. <br />7150.1 ft <br />6386.8 ft. <br />6609.7 ft <br />6324.9 ft. <br />6348 0 ft <br />6743.7 ft. <br />6822.9 ft. <br />7744.8 ft. <br />6944.0 ft <br />7468 0 ft. <br />DRY <br />7203.3 ft. <br />6545.7 ft. <br />7212.7 ft. <br />DRY <br />DRY <br />7238.5 ft. <br />Elevation & As - built <br />Depth Water Level <br />Liu <br />Existing Storage <br />Capacity <br />1.43 ac -ft <br />7 16 ac -ft <br />0 49 ac -ft. <br />4.83 ac -ft. <br />0.40 ac -ft. <br />1.02 ac -ft. <br />2.37 ac -ft. <br />3.21 ac -ft. <br />0.75 ac -ft. <br />2 01 ac -ft. <br />1.39 ac -ft <br />1.05 ac -ft <br />6 18 ac -ft. <br />4.56 ac -ft. <br />0 79 ac -ft. <br />1 40 ac -ft. <br />1.70ac -ft <br />0.67 ac -ft. <br />(e l <br />None <br />Partial <br />Cleaning <br />Complete <br />during 4th <br />Quarter <br />None <br />None <br />None <br />Partial <br />Cleaning <br />Complete <br />during 4th <br />Quarter <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />Maintenance Items <br />Colowyo Coal Company <br />573 State Highway 13 <br />Meeker, CO 81641 <br />T 970 - 824 -1573 <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of Environmental Solutions, Inc , P O. Box 2996, Cheyenne <br />Wyoming The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation and the coal <br />permitting process in Colorado, the information contained herein is reasonable and correct to the best of my experience. <br />Note (d) impoundment volumes are estimated from pre - existing as -built surveys, and estimates of accumulated sediment <br />CF2112 2011 <br />Outfall Inspection - Ponds <br />Outfall Point <br />4th Quarter 2011 <br />Year <br />Q`PO0 001111 1/1 4 <br />S' - 32257 2 <br />1 ; <br />t2Izz/ll <br />OA F ........ <br />S iONAL F '` . ‘ <br />TH • A P RSO <br />P.E. No. 32257 <br />