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Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Outfall Inspection - Ponds <br />Third Quarter 2013 <br />Year <br />I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document was provided by Colowyo Coal L.P. <br />Being familiar with the Colowyo operation, and relying on the information provided to me by Colowyo Personnel, the information contained herein is <br />reasonable and correct to the best of my knowledge and experience. <br />Moment in time measurement of the elevation of the top of the captured pool of water within the pond. <br />Note: (d) impoundment volumes are estimated from pre - existing as -built surveys, pond cleaning, and estimates of accumulated sediment. <br />Selected ponds (Prospect, Streeter, West Taylor, and East Taylor) underwent field survey updates in 2012. <br />CF 21.1.2 2013 <br />`````�\\\ \1111111 / / /��''''' <br />N <br />N� <br />o <br />47031 <br />o <br />��jt'._ �F1•- NNE <br />X <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 />Streeter <br />Work Area <br />Gossard <br />Gulch A <br />Stoker Siding <br />Rail Loop <br />Prospect <br />West Pit <br />Section 16 <br />East Taylor <br />West Taylor <br />Sec. 28 <br />Sediment Pond <br />Pond <br />Loadout Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Inspection Date: <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9117/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />9/17/2013 <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />K. Blunt/ <br />Inspector: <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />L. Sampson <br />Rule 4.05.9 (151 <br />(a) <br />Does pond exhibit <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 />structural weakness, <br />erosion, or other <br />hazardous conditions? <br />( b 1 <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Monitoring Procedures <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />and Instrumentation <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />(c1 <br />'Elevation & As -built <br />6583.10 <br />7150.00 <br />6389.00 <br />Dry <br />6324.90 <br />6346.50 <br />6740.00 <br />6824.00 <br />7745.90 <br />6944.10 <br />7468.10 <br />Dry <br />Depth Water Level <br />(d) <br />Existing Storage <br />1.52 ac -ft. <br />8.71 ac -ft. <br />2.31 ac -ft. <br />3.56 ac -ft. <br />0.45 ac -ft. <br />0.80 ac -ft. <br />1.31 ac -ft. <br />4.64 ac -ft. <br />1.32 ac -ft. <br />1.16 ac -ft. <br />0.36 ac -ft <br />1.70 ac -ft <br />Capacity <br />( e ) <br />Cleanout <br />Cleanout <br />Cleanout <br />Cleanout <br />Maintenance Items <br />scheduled for <br />None <br />None <br />None <br />None <br />None <br />scheduled for <br />None <br />None <br />scheduled for 4'th <br />scheduled for <br />None <br />4'th Quarter <br />4'th Quarter <br />4'th Quarter <br />Quarter 2013 <br />2013 <br />2013 <br />2013 <br />I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document was provided by Colowyo Coal L.P. <br />Being familiar with the Colowyo operation, and relying on the information provided to me by Colowyo Personnel, the information contained herein is <br />reasonable and correct to the best of my knowledge and experience. <br />Moment in time measurement of the elevation of the top of the captured pool of water within the pond. <br />Note: (d) impoundment volumes are estimated from pre - existing as -built surveys, pond cleaning, and estimates of accumulated sediment. <br />Selected ponds (Prospect, Streeter, West Taylor, and East Taylor) underwent field survey updates in 2012. <br />CF 21.1.2 2013 <br />`````�\\\ \1111111 / / /��''''' <br />N <br />N� <br />o <br />47031 <br />o <br />��jt'._ �F1•- NNE <br />X <br />