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May 18, 2015 C-1981-025/North Thompson Creek Mine RAR <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 />R - Availability of Records <br />NA - Backfill & Grading <br />NA - Excess Spoil and Dev. Waste <br />NA - Explosives <br />NA - Fish & Wildlife <br />R - Hydrologic Balance <br />NA - Gen. Compliance With Mine Plan <br />R - Other <br />NA - Processing Waste <br />NA -Roads <br />R - Reclamation Success <br />R - Revegetation <br />Y - Subsidence <br />N - Slides and Other Damage <br />NA - Support Facilities On-site <br />R -Signs and Markers <br />NA - Support Facilities Not On-site <br />NA - Special Categories Of Mining <br />NA -Topsoil <br />COMMENTS <br />This complete inspection of North Thompson Mine outside Glenwood Springs, Colorado was conducted on Monday the <br />18th of May 2015. Ground conditions were damp and in places muddy. The day was overcast and 451 F and rainy. No <br />snow was present. <br />Robin Reilley accompanied by Dan Hernandez both of the Division of Reclamation Mining and Safety (DRMS) <br />conducted the inspection. This is an inactive site; therefore no company/operator was present for the inspection. <br />This was a complete inspection with a focus on hydrology and revegetation progress. The inspection was begun at the <br />reclaimed Mine 3 portal. <br />SIGNS AND MARKERS Rule 4.02: <br />Mine Identification signs and surface disturbance markers identified during this inspection were installed as required <br />throughout the areas visited. The exception being that the: <br />• Permit boundary sign at far end of the site is shot up and propped up between rocks rather than mounted on its vertical pole. <br />HYDROLOGIC BALANCE Rule 4.05: <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures <br />4.05.7; 4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; <br />Surface Water Monitoring 4.05.13; Drainage Acid and Toxic Materials 4.05.8; Impoundments <br />4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />The observed long pond and ponds T1, T2, P9 and the refuse pond appeared to be functioning. With the exception of the <br />refuse pond that held only a little water the other ponds held significant water. Discharge channels were free of debris. <br />Vegetation was beginning to emerge and no evidence of instability or damage were noted on pond slopes with the <br />Number of Partial Inspection this Fiscal Year: 1 <br />Number of Complete Inspections this Fiscal Year: 4 <br />Page 2 of 9 <br />