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Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Outfall Inspection - Ponds <br />Second Quarter 2014 <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. ``�� �� ..��• Fti ���� <br />` Moment in time measurement of the elevation of the top of the captured pool of water within the pond. ` • N •' i <br />All ponds were surveyed during 2nd quarter, 2014 other than the West Taylor and East Taylor Ponds, which will be surveyed after dredging during the 3rd quarter, 2014 _ 47031 <br />P Y 9 4 Y Y Y 9 9 9 Q <br />Note: (d) Existing storage capacities were adjusted to reflect corrected design storage capacity based on field survey. The West Taylor and East Taylor existing �i ', '• •••••••.• <br />storage cities were during 3rd. ed on field estimates of sediment inflow. The West Taylor and East Taylor capacities will be corrected following survey, <br />scheduled a <br />CF 21.1.2 2014 <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 />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <br />6/24/2014 <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 />Dry (Pumped for <br />Dry (Pumped for <br />`Elevation & As -built <br />6583.00 <br />outlet repair) <br />6390.00 <br />Dry <br />6325.00 <br />6347.50 <br />6742.00 <br />6824.00 <br />7745.33 <br />6944.10 <br />sediment <br />Dry <br />Depth Water Level <br />removal) <br />( d ) <br />1.18 ac -ft. <br />0.36 ac -ft <br />Existing Storage <br />1.64 ac -ft. <br />9.84 ac -ft. <br />1.54 ac -ft. <br />3.70 ac -ft. <br />0.35 ac -ft. <br />0.52 ac -ft. <br />2.06 ac -ft. <br />3.90 ac -ft. <br />0.60 ac -ft. <br />(Pending 3rd <br />(Pending 3rd <br />1.67 ac -ft <br />Capacity <br />quarter survey) <br />quarter survey) <br />(_eJ <br />Design storage below <br />2.63 ac -ft. <br />12.33 ac -ft. <br />3.0 ac -ft. <br />3.82 ac -ft. <br />0.38 ac -ft. <br />1.0 ac -ft. <br />2.25 ac -ft. <br />5.5 ac -ft. <br />1.26 ac -ft. <br />2.85 ac -ft. <br />1.77 ac -ft. <br />1.67 ac -ft. <br />weep holes /primary <br />discharge (ac -ft.) <br />Dredging in <br />Dredging in <br />! f 1 <br />progress. <br />progress. <br />Maintenance Items <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />Survey <br />Survey <br />None <br />scheduled post- <br />scheduled post <br />dredging. <br />dredging. <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. ``�� �� ..��• Fti ���� <br />` Moment in time measurement of the elevation of the top of the captured pool of water within the pond. ` • N •' i <br />All ponds were surveyed during 2nd quarter, 2014 other than the West Taylor and East Taylor Ponds, which will be surveyed after dredging during the 3rd quarter, 2014 _ 47031 <br />P Y 9 4 Y Y Y 9 9 9 Q <br />Note: (d) Existing storage capacities were adjusted to reflect corrected design storage capacity based on field survey. The West Taylor and East Taylor existing �i ', '• •••••••.• <br />storage cities were during 3rd. ed on field estimates of sediment inflow. The West Taylor and East Taylor capacities will be corrected following survey, <br />scheduled a <br />CF 21.1.2 2014 <br />