_INSPECTION - C1981025 (17) - Laserfiche WebLink

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June 7,2011 C-1981-025/North Thompson Creek Mine Inspection Topic Summary NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable N -Air Resource Protection R -Roads R -Availability of Records R -Reclamation Success N -Backfill&Grading N -Revegetation N -Excess Spoil and Dev.Waste N - Subsidence N -Explosives N - Slides and Other Damage N -Fish&Wildlife N -Support Facilities On-site R -Hydrologic Balance R -Signs and Markers N -Gen. Compliance With Mine Plan N -Support Facilities Not On-site R -Other N - Special Categories Of Mining N -Processing Waste N -Topsoil COMMENTS This was a complete inspection of the North Thompson Creek Mines conducted by Jim Stark of the Colorado Division of Reclamation,Mining and Safety(Division). No representative from Minrec, Inc. accompanied me on the inspection. The bond has been released for all but 4.1 acres of the site,which represents a mine discharge and a series of treatment ponds in a developed water resource. The weather was warm and sunny and the ground was dry at the time of the inspection. AVAILABILITY OF RECORDS—Rule 5.02.4(1): -All of the necessary records were in the records room at the Garfield County Court House in Glenwood Springs. See the Availability of Records form at the end of this inspection for more detailed information. HYDROLOGIC BALANCE-Rule 4.05 Drainage Control 4.05.1,4.05.2,4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7,4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; Drainage—Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: -The water discharging from the#3 mine was discharging very high in iron, as evidenced by the orange color of the discharge. This is normal for the spring runoff time for the#3 mine. The discharge from the#1 mine was clear at the time of the inspection. These discharges combine and flow through the Long Pond, where most of the iron is removed. -The Long Pond was stable and well vegetated at the time of the inspection. There was a good stand of cat tails in the pond,which helps to remove the iron from the mine discharge. There is a good deal of iron(orange) staining at the inlet of the long pond from the iron in the#3 mine discharge. As the water flows through the pond the staining goes away, as the iron is removed. The Long Pond discharges into treatment ponds T-1 and T-2. Number of Partial Inspection this Fiscal Year: 0 Number of Complete Inspections this Fiscal Year: 4 Page 2 of 7