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Colowyo Coal Company Stockpond Inspections <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Fourth Quarter 2016 <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 information <br />provided to me by Colowyo Personnel, the Information contained herein is reasonable and corned to the best <br />of my knowledge and experience <br />E Pd Stockpond Insp 4th_Otr_2016 <br />PD1 <br />PD2 <br />NTEPI <br />EPI <br />EP2 <br />ETI <br />ET2 <br />ETD1 <br />Inspection Date <br />11/10/2016 <br />11/10/2016 <br />11/10/2016 <br />11/10/2016 <br />11/10!2016 <br />11/102016 <br />11/10/2016 <br />11/10/2016 <br />Inspector <br />Kurt Blunt <br />Kurt Blunt <br />Kurt Blunt <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 />Lee Sampson <br />Lee Sampson <br />Lee Sampson <br />Rule 4.05.9 (161 <br />(aI <br />Does pond exhibit <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />structural weakness, <br />erosion, or other <br />hazardous conditions? <br />( b l <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 />and Instrumentation <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />Inspections <br />( C I <br />73520 <br />75580 <br />7382.0 (Dry) <br />7373.8 <br />7495.0 <br />7282.0 <br />74480 <br />7285.0 <br />Elevation & As -built <br />Depth Water Level <br />(dl <br />Exlshng Storage <br />1.08 ac -ft. <br />1.49 ac -ft. <br />2.02 ac -ft. <br />1.25 ac -ft. <br />2 39 ac -ft. <br />0 737 ac -ft <br />2.33 ac -ft <br />0 915 ac -ft <br />Capacity <br />I� <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 />0 737 ac -ft <br />2.33 ac -ft <br />0 915 ac -ft <br />weep holes/pnmary <br />discharge (ac -ft) <br />Uf I <br />None <br />None <br />None <br />None <br />Pumping <br />None <br />None <br />None <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 information <br />provided to me by Colowyo Personnel, the Information contained herein is reasonable and corned to the best <br />of my knowledge and experience <br />E Pd Stockpond Insp 4th_Otr_2016 <br />