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Colowyo Coal Company First Quarter 2017 <br />5731 State Highway 13 Year <br />Meeker, CO 81641 Outfall Inspection - Ponds <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 />Note (d) The Gossard pond, Rail loop pond and West Pit pond were cleaned during the 4th quarter of 2015 Capacities for those pond have been adjusted to represent the pond capacity after cleaning <br />The remaining ponds capacities have been adjusted to represent the capacity after 2014 survey <br />001A <br />002A <br />003A <br />004A <br />006A <br />008A <br />007A <br />008A <br />009A <br />010A <br />011A <br />012A <br />Streeter <br />Work Area <br />Goesard <br />Gulch A <br />Stoker Sliding <br />Rail Loop <br />Prospect <br />Nest Pit <br />Section 18 <br />East Taylor <br />West Taylor <br />Sec. 28 <br />SedknentPond <br />Pond <br />LoadoutPond <br />Pond <br />Ports <br />Pond <br />Pond <br />Pats <br />Pond <br />Pond <br />Pond <br />Pond <br />Inspection Date <br />3242017 <br />3242017 <br />3242017 <br />3242017 <br />3242017 <br />3242017 <br />3242017 <br />3242017 <br />3282017 <br />3242017 <br />3/242017 <br />3242017 <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 4.06.81161 <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 conditions9 <br />Ibl <br />Monitoring Procedures <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 />and Instrumentation <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />Inspection <br />LJ <br />*Water Elevation <br />658300 <br />715400 <br />639300 <br />661150 <br />6325.00 <br />634850 <br />6744.00 <br />682000 <br />7745.80 <br />6944.00 <br />7468.00 <br />Dry <br />Idill l <br />Existing Storage <br />1 52 <br />9 81 <br />2 49 <br />370 <br />0 35 <br />070 <br />1.69 <br />4 35 <br />0.58 <br />203 <br />1.54 <br />1 67 <br />Capacity (ac -ft) <br />(a) <br />Design storage below <br />2.63 <br />1233 <br />3.00 <br />382 <br />0.38 <br />1 00 <br />225 <br />550 <br />126 <br />2 85 <br />1 77 <br />1.67 <br />weep holes/pnmary <br />discharge (ac -ft) <br />Ll <br />Maintenance Items <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <br />None <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 />Note (d) The Gossard pond, Rail loop pond and West Pit pond were cleaned during the 4th quarter of 2015 Capacities for those pond have been adjusted to represent the pond capacity after cleaning <br />The remaining ponds capacities have been adjusted to represent the capacity after 2014 survey <br />