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May 22, 2012 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 />N - Air Resource Protection <br />N - Availability of Records <br />R - Backfill & Grading <br />N - Excess Spoil and Dev. Waste <br />N - Explosives <br />N - Fish & Wildlife <br />R - Hydrologic Balance <br />R - Gen. Compliance With Mine Plan <br />R - Other <br />NA - Processing Waste <br />R -Roads <br />R - Reclamation Success <br />N - Revegetation <br />NA - Subsidence <br />R - Slides and Other Damage <br />R - Support Facilities On -site <br />Y -Signs and Markers <br />NA - Support Facilities Not On -site <br />NA - Special Categories Of Mining <br />R - Topsoil <br />COMMENTS <br />Rob Zuber and Dan Hernandez of DRMS conducted the partial inspection. Tony Tennyson and Chip Brown of <br />Colowyo also participated in the inspection. The ground was entirely free of snow. The weather was warm and <br />windy; no precipitation was experienced. <br />Activities on site during the one -day inspection included: <br />• The 102 dragline was undergoing maintenance at the West Pit Spoil Pile (aka Henks Peak), but the height <br />of the peak has been greatly reduced in recent weeks (since April inspection). <br />• In the West Pit, the 103 dragline was casting spoil. <br />• In the East Pit, the 101 dragline was idle. <br />• In South Taylor Pit, the 115 excavator and 114 shovel were loading trucks. <br />• Trucks were dumping material at elevation 7850' in the South Taylor Fill. <br />BACKFILL and GRADING — Rule 4.14: <br />West Taylor Fill was observed from the road below, and no problems were observed. The process of laying rock <br />in the side drains is complete or nearly complete. These rocks vary widely in size, from smaller than a human <br />hand to larger than a small car. <br />HYDROLOGIC BALANCE - Rule 4.05: <br />The following ponds were inspected: Prospect, West Taylor, East Taylor, and ponds in the East Pit area (PD -1, <br />NTEP -1). West Taylor, East Taylor, and Prospect were discharging (only small trickle out of Prospect — the flume <br />was dry). The discharge water was clear for these three ponds. No problems were identified with dams or other <br />structural aspects of the ponds. <br />Number of Partial Inspection this Fiscal Year: 9 <br />Number of Complete Inspections this Fiscal Year: 3 <br />Page 2 of 12 <br />