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Colowyo Coal Company Stockpond Inspections <br />5731 State Highway 13 East Pit <br />Meeker, CO 81641 <br />First Quarter 2015 <br />Notes: <br />- Impoundment volumes(d) are estimated from pre- existing as -built surveys, and estimates of accumulated <br />sediment. <br />I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document <br />was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the <br />information provided to me by Colowyo Personnel, the information contained herein is reasonable and <br />correct to the best of my knowledge and experience. .00'll I"'11i,, <br />�; <br />47031 <br />"o� '• � 2 S �s•' ter, <br />PD1 <br />PD2 <br />NTEP1 <br />EP1 <br />EP2 <br />Inspection Date: <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />3/23/2015 <br />Inspector: <br />Kurt Blunt <br />Kurt Blunt <br />Kurt Blunt <br />Kurt Blunt <br />Kurt Blunt <br />Lee Sampson <br />Lee Sampson <br />Lee Sampson <br />Lee Sampson <br />Lee Sampson <br />Rule 4.05.9 (15) <br />( a ) <br />Does pond exhibit <br />None <br />None <br />None <br />None <br />None <br />structural weakness, <br />erosion, or other <br />hazardous conditions? <br />( b ) <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Quarterly/ <br />Monitoring Procedures <br />Annual <br />Annual <br />Annual <br />Annual <br />Annual <br />and Instrumentation <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />c) <br />Elevation & As -built <br />7356.0 <br />7560.0 <br />7381.0 <br />7374.8 <br />7495.0 <br />Depth Water Level <br />( d Z <br />Existing Storage <br />1.10 ac -ft. <br />1.49 ac -ft. <br />2.03 ac -ft. <br />1.27 ac -ft. <br />2.41 ac -ft <br />Capacity <br />(G) <br />Design storage below <br />1.10 ac -ft. <br />1.49 ac -ft. <br />2.03 ac -ft. <br />1.29 ac -ft. <br />2.43 ac -ft <br />weep holes /primary <br />discharge (ac -ft.) <br />Lf) <br />Pumping <br />None <br />None <br />None <br />Pumping <br />Maintenance Items <br />Notes: <br />- Impoundment volumes(d) are estimated from pre- existing as -built surveys, and estimates of accumulated <br />sediment. <br />I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document <br />was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the <br />information provided to me by Colowyo Personnel, the information contained herein is reasonable and <br />correct to the best of my knowledge and experience. .00'll I"'11i,, <br />�; <br />47031 <br />"o� '• � 2 S �s•' ter, <br />