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Colowyo Coal Company Stockpond Inspections <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Third 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 47031 <br />was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the information �t9�/ti—�� : < <br />provided to me by Colowyo Personnel, the information contained herein is reasonable and correct to the best OF <br />of my knowledge and experience. S •••••' a�^ \�C <br />E Pit Stockpond Insp 3rd_Qtr_2016 <br />PD1 <br />PD2 <br />NTEP1 <br />EP1 <br />EP2 <br />ETI <br />ET2 <br />ETD1 <br />Inspection Date <br />9/19/2016 <br />9/192016 <br />9/192016 <br />9/192016 <br />9/19/2016 <br />9/19/2016 <br />9/19/2016 <br />9/192016 <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 (151 <br />ta) <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 />Ic) <br />Elevation 8 As -built <br />7352.0 <br />7559.0 <br />7382 0 (Dry) <br />73708 <br />7495.0 <br />7281.0 <br />7447.0 <br />7282.0 <br />Depth Water Level <br />I d I <br />Existing 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! e 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 />U <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 47031 <br />was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the information �t9�/ti—�� : < <br />provided to me by Colowyo Personnel, the information contained herein is reasonable and correct to the best OF <br />of my knowledge and experience. S •••••' a�^ \�C <br />E Pit Stockpond Insp 3rd_Qtr_2016 <br />