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May 25, 2011 C- 1992 - 080 /Carbon Junction Mine MLT <br />Inspection Topic Summary <br />NOTE: Y= Inspected N =Not Inspected R= Comments Noted V= Violation Issued NA =Not Applicable <br />• -Air Resource Protection <br />• -Availability of Records <br />N - Backfill & Grading <br />N - Excess Spoil and Dev. Waste <br />NA - Explosives <br />Y - Fish & Wildlife <br />R - Hydrologic Balance <br />N - Gen. Compliance With Mine Plan <br />R - Other <br />NA - Processing Waste <br />Y -Roads <br />N - Reclamation Success <br />R - Revegetation <br />NA - Subsidence <br />N - Slides and Other Damage <br />NA - Support Facilities On -site <br />N -Signs and Markers <br />NA - Support Facilities Not On -site <br />N - Special Categories Of Mining <br />N - Topsoil <br />COMMENTS <br />This was a partial inspection of the Carbon Junction Mine conducted by Marcia Talvitie of the <br />DRMS Durango Field Office. Weather conditions were clear and breezy; the temperature was in <br />the low 70's. <br />I arrived at the permit area at 15:00. The gate was closed and locked. <br />Due to the time of year, the main focus of this inspection was the identification of any noxious <br />weeds that might be appearing. Weeds were observed at several locations within the pen area; <br />specific details are provided in the Revegetation section of this report, below. <br />In the lower reaches of the rerouted Carbon Junction channel, I met two Geological Engineering <br />students from the Colorado School of Mines. They indicated that numerous students were in the <br />area, studying glacial outwash terraces. <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 Carbon Junction channel downstream of the dual culverts passing beneath the haul road <br />shows no evidence of stream flow, and the channel appears to be in good condition. Riprap <br />lining the channel shows no sign of movement (Photo 1). <br />• There is some accumulation of sediment in the channel upstream of the culverts (Photo 2). <br />Both culverts are clear and appear to be in good condition. The outlet ends of the culverts <br />appear to be slightly lower than the elevation of the channel downstream (Photo 3). <br />REVEGETATION — Rule 4.15 <br />Vegetative Cover; Timing: <br />• Numerous Canada thistle rosettes were observed sprouting up between the riprap boulders at <br />various locations in the Carbon Junction channel, downstream of the dual culverts (Photo 4). <br />• Thistles are especially prevalent within the basin of the reclaimed Sediment Pond 2. The <br />Number of Partial Inspection this Fiscal Year: 8 <br />Number of Complete Inspections this Fiscal Year: 3 Page 2 of 7 <br />