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December 21, 2011 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 />Y - Air Resource Protection <br />N - Availability of Records <br />N - Backfill & Grading <br />Y - 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 />Y - Revegetation <br />NA - Subsidence <br />N - Slides and Other Damage <br />R - Support Facilities On -site <br />R -Signs and Markers <br />NA - Support Facilities Not On -site <br />NA - Special Categories Of Mining <br />Y - Topsoil <br />COMMENTS <br />The weather was cloudy and cold, and the ground was mostly covered with snow. <br />Operations have begun to move the large West Pit spoil pile (aka "Henk's Peak ") to fill the pit. The 102 dragline <br />was working on a pad during the inspection. <br />At the sound end of West Pit, the 103 dragline was making dump room beside the highwall. <br />In South Taylor Pit (northeast corner) the 114 shovel was loading trucks with interburden. <br />At South Taylor fill, trucks were dumping loads and a dozer was working. <br />In the East Pit, the 101 dragline was idle. <br />HYDROLOGIC BALANCE - Rule 4.05 Drainage Control 4.05.1, 4.05.2, 4.053; Siltation Structures 4.05.5, <br />4.05.6; Discharge Structures 4.05.7, 4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water <br />Monitoring 4.05.13; Surface Water Monitoring 4.05.13; Drainage — Acid and Toxic Materials 4.05.8; <br />Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />Due to the cold weather (well below freezing), no snow melt runoff was observed during the inspection. <br />Drainage ditches, contour ditches and ponds were inspected in the East Pit area. No problems were observed. <br />All NPDES ponds were inspected except Stoker Siding, West Taylor, Section 16, and Section 21. The following <br />ponds were discharging: Streeter and East Taylor. The water flowing from these two ponds was clear. No <br />problems were observed with any of the embankments. The flume at Gulch A requires some willow removal. <br />Number of Partial Inspection this Fiscal Year: 4 <br />Number of Complete Inspections this Fiscal Year: 2 <br />Page 2 of 8 <br />