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Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Outfall Inspection - Ponds <br />Fourth 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 and East Taylor) underwent field survey updates in 2013. <br />CF 21.1.2 2013 <br />47031 S , <br />/ -7 -1 4 ,: <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 Pk <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 />12/3/2013 <br />12/3/2013 <br />1213/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />12/3/2013 <br />Inspector: <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 />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 (15) <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) <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 />C) <br />*Elevation & As -built <br />6583.10 <br />7154.00 <br />6390.60 <br />Dry <br />6325.10 <br />6347.50 <br />6735.00 <br />6823.00 <br />7745.50 <br />6936.00 <br />7468.10 <br />Dry <br />Depth Water Level <br />( d l <br />2.34 ac -ft. <br />2.24 ac -ft. <br />1.18 ac -ft. <br />Existing Storage <br />Pending survey <br />8.35 ac -ft. <br />2.15 ac -ft. <br />3.56 ac -ft. <br />0.45 ac -ft. <br />0.70 ac -ft. <br />Surveyed post <br />4.64 ac -ft. <br />1.32 ac -ft. <br />Surveyed post <br />0.36 ac -ft <br />1.70 ac -ft <br />Capacity <br />confirmation <br />cleanout <br />cleanout <br />Removed 1200 <br />yards during <br />Cleanout <br />Removed 1310 <br />Removed 1834 <br />November 2013. <br />Maintenance Items <br />yards during <br />None <br />None <br />None <br />None <br />None <br />yards during <br />None <br />None <br />Additional <br />scheduled for <br />None <br />2'nd Quarter <br />October 2013 <br />October 2013 <br />removal <br />2014 <br />scheduled for 2'nd <br />Quarter 2014 <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 and East Taylor) underwent field survey updates in 2013. <br />CF 21.1.2 2013 <br />47031 S , <br />/ -7 -1 4 ,: <br />