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Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Outfall Inspection - Ponds <br />First Quarter 2015 <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 />All ponds were surveyed during 2nd quarter, 2014 other than the West Taylor and East Taylor Ponds, which were surveyed after dredging during 3rd quarter, 2014 <br />The East Taylor Pond required additional dredging, which was completed during 4th quarter 2014. The East Taylor Pond was re- surveyed on 10- 31 -14. <br />Note: (d) Existing storage capacities were adjusted to reflect sediment import since 2014 survey. <br />47031 _ <br />3 -2 s -rs r <br />i '. <br />1111111 <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 />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <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 (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 <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 />`Water Elevation <br />6583.10 <br />7151.50 <br />6391.10 <br />Dry <br />6325.10 <br />6350.00 <br />6739.00 <br />6824.00 <br />7746.10 <br />6944.10 <br />7468.10 <br />Dry <br />( d ) <br />Existing Storage <br />1.63 <br />9.84 <br />1.49 <br />3.70 <br />0.35 <br />0.48 <br />2.01 <br />3.88 <br />0.59 <br />2.39 <br />1.67 <br />1.67 <br />Capacity (ac -ft) <br />(_e_) <br />Design storage below <br />2.63 <br />12.33 <br />300 <br />3.82 <br />0.38 <br />1.00 <br />2.25 <br />5.50 <br />1.26 <br />2.85 <br />1.77 <br />1.67 <br />weep holes /primary <br />discharge (ac -ft.) <br />Outlet pipe is <br />Outlet pipe is <br />f f I <br />scheduled to <br />scheduled to <br />Maintenance Items <br />None <br />be replaced <br />None <br />None <br />None <br />None <br />be replaced <br />None <br />None <br />None <br />None <br />None <br />during Q2, <br />during Q2, <br />2015 <br />2015 <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 />All ponds were surveyed during 2nd quarter, 2014 other than the West Taylor and East Taylor Ponds, which were surveyed after dredging during 3rd quarter, 2014 <br />The East Taylor Pond required additional dredging, which was completed during 4th quarter 2014. The East Taylor Pond was re- surveyed on 10- 31 -14. <br />Note: (d) Existing storage capacities were adjusted to reflect sediment import since 2014 survey. <br />47031 _ <br />3 -2 s -rs r <br />i '. <br />1111111 <br />