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June 23, 2015 C-1981-019/Colowyo Coal Mine RDZ <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA Not Applicable <br />R - Air Resource Protection <br />Y - Availability of Records <br />Y - Backfill & Grading <br />R - Excess Spoil and Dev. Waste <br />R - Explosives <br />R - Fish & Wildlife <br />R - Hydrologic Balance <br />R - Gen. Compliance With Mine Plan <br />N - Other <br />NA - Processing Waste <br />R - Roads <br />R - Reclamation Success <br />Y - Revegetation <br />NA - Subsidence <br />Y - Slides and Other Damage <br />Y - Support Facilities On-site <br />R -Signs and Markers <br />NA - Support Facilities Not On-site <br />R - Special Categories Of Mining <br />R -Topsoil <br />COMMENTS <br />A complete inspection was conducted by Rob Zuber of DRMS on June 23 - 25, 2015. The Colowyo employee <br />who participated in the on -the -ground field inspection was Kurtis Blunt. Blasting records were checked with <br />Tracy (Chip) Brown. Martin Stearns and Tony Tennyson participated in office discussions. <br />The weather was warm. The ground was dry. <br />hi the South Taylor Pit the following was observed: <br />The 103 dragline was idle near the north end of the pit. <br />The highwall miner was producing E seam coal along the eastern wall; it has advanced to past half way along the <br />east side (hole 190). <br />The 114 shovel was idle at the time of the inspection. It was near the southeast corner of the pit. <br />AIR RESOURCE PROTECTION — Rule 4.17: <br />A water truck was seen controlling dust on the roads. <br />EXCESS SPOIL and DEVELOPMENT WASTE — Rule 4.09 <br />Placement; Drainage Control; Surface Stabilization: <br />The West Pit Fill was inspected from above and below. No rills or gullies were observed. Per Kurt <br />Blunt, there is an area on the fill that requires more topsoil, and this will be done in 2015; it was not completed in <br />2014 because the wet season interrupted this reclamation. <br />EXPLOSIVES — Rule 4.08 <br />Distance Prohibitions 4.08.4; Warnings 4.08.4; Control of Adverse Effects 4.08.4: <br />A blast of E2 overburden in the southwest corner of the pit was observed from the overlook at the north <br />end of the pit. The pre -blast sirens were heard, and the all clear signal was heard. No noxious fumes were seen. <br />Number of Partial Inspection this Fiscal Year: 9 <br />Number of Complete Inspections this Fiscal Year: 4 <br />Page 2 of 12 <br />