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Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />T'970 -824 -1573 <br />Outfall Inspection - Ponds <br />1 st Quarter 2013 <br />Year <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of Environmental Solutions, Inc., P. O. Box 2996, Cheyenne %``, fl ttLN7�z�� /''' <br />Wyoming. The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation and the coal `� P CF i� <br />permitting process in Colorado, the information contained herein is reasonable and correct to the best of my experience. �� ••• • pFP ,A <br />� S i <br />Note: (d) impoundment volumes are estimated from pre- existing as -built surveys, pond cleaning, and estimates of accumulated sediment. 32%257 Z�I <br />L�/��t tv� <br />Selected ponds (Prospect, Streeter, West Taylor, and East Taylor) underwent field survey updates in 2012. ZO <br />G 1L,�� <br />THOMAS C PETERSON <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 />LoadoutPond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Pond <br />Inspection Date: <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3112/2013 <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3/12/2013 <br />3112/2013 <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 />T. Peterson <br />T. Peterson <br />T. Peterson <br />T. Peterson <br />T. Peterson <br />T Peterson <br />T. Peterson <br />T. Peterson <br />T Peterson <br />T. Peterson <br />T. Peterson <br />T. Peterson <br />Rule 4.05.9 (15) <br />( a ) <br />Does pond exhibit <br />Not Accessible <br />Not Accessible <br />Not Accessible <br />Not Accessible <br />structural weakness, <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />due to snow <br />due to snow <br />due to snow <br />due to snow <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 />7152.00 <br />6390.67 <br />Dry <br />6325.00 <br />6349.50 <br />6739.00 <br />6824.00 <br />N/A <br />N/A <br />N/A <br />N/A <br />Depth Water Level <br />( d ) <br />Existing Storage <br />1.52 ac -ft. <br />8.71 ac -ft. <br />2.41 ac -ft. <br />3.56 ac -ft. <br />0.45 ac -ft. <br />1.03 ac -ft. <br />1.56 ac -ft. <br />4.64 ac -ft. <br />1.32 ac -ft. <br />1.26 ac -ft. <br />0.41 ac -ft <br />1.70 ac -ft <br />Capacity <br />Partial cleaning <br />Partial <br />done Q32012, <br />cleanout <br />3,110 cu yd, <br />Cleaning <br />�e <br />Cleanout <br />None <br />None <br />None <br />None <br />None <br />completed <br />None <br />None <br />final survey <br />needed in <br />None <br />Maintenance Items <br />recommended <br />Q32012, 3,010 <br />completed, Re- <br />2013 <br />cu yds <br />Survey <br />Recommended <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of Environmental Solutions, Inc., P. O. Box 2996, Cheyenne %``, fl ttLN7�z�� /''' <br />Wyoming. The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation and the coal `� P CF i� <br />permitting process in Colorado, the information contained herein is reasonable and correct to the best of my experience. �� ••• • pFP ,A <br />� S i <br />Note: (d) impoundment volumes are estimated from pre- existing as -built surveys, pond cleaning, and estimates of accumulated sediment. 32%257 Z�I <br />L�/��t tv� <br />Selected ponds (Prospect, Streeter, West Taylor, and East Taylor) underwent field survey updates in 2012. ZO <br />G 1L,�� <br />THOMAS C PETERSON <br />