2012-05-31_INSPECTION - C1982057

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May 21, 2012 C- 1982 - 057 /Seneca II -W Mine SLB Inspection Topic Summary NOTE: Y= Inspected N =Not Inspected R — Comments Noted V= Violation Issued NA Not Applicable NA -Air Resource Protection R -Availability of Records Y - Backfill & Grading NA - Excess Spoil and Dev. Waste NA - Explosives R - Fish & Wildlife R - Hydrologic Balance Y - Gen. Compliance With Mine Plan NA -Other NA - Processing Waste R -Roads Y - Reclamation Success R - Revegetation NA - Subsidence R - Slides and Other Damage Y - Support Facilities On -site Y -Signs and Markers NA - Support Facilities Not On -site Y - Special Categories Of Mining Y - Topsoil COMMENTS This was a complete inspection of the Seneca IIW Mine conducted by Susan Burgmaier of CDRMS. In addition to the ground inspection conducted May 23r aerial photographs of the site taken May 21S were reviewed. Weather conditions were warm and windy; ground conditions were dry. No activities were observed on site, recent activities included repair of the Pond 016A slide area. AVAILABILITY OF RECORDS Rule 5.02.4(1): Records were inspected at the Sage Creek Mine offices on May 23, 2012. All required records were available and up to date. FISH and WILDLIFE Rule 4.18: The game trails around Ponds 016, 017, and T18 all showed signs of recent heavy use by elk, and ten elk were observed crossing the reclaimed G Road near T18. There was a sand hill crane at the outfall flume of Pond 005. A red- tailed hawk was circling above Pond 015. 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: Ponds 006, 015, 016 and 017 were discharging clear water. Ponds 005 and 009 held water below the discharge level. The outfall of Pond 009 is leaking, presumably in the riser joint, and should be repaired when water level allows. Pond embankments were stable and vegetated; spillways were functional. Stocktanks T1, T18, and T25 were dry. T1 had been breached and is no longer constructed as a stocktank. T25 also had been breached to prevent saturation of the slope above Pond 017. Stocktanks T5, T20, T26 and T27 both held water. The spring running into Pond 017 was active, but flow was extremely low. The spoil spring above Pond 016 was discharging into the pond via PM -2. The south area drainage channels were in poor condition as a result of a major storm event last season; the Number of Partial Inspection this Fiscal Year: 13 Number of Complete Inspections this Fiscal Year: 4 Page 2 of 9