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September 26, 2012 C- 1980 -001 /Edna Strip Mine RDZ <br />Inspection Topic Summary <br />NOTE: Y= Inspected N =Not Inspected R — Comments Noted V= Violation Issued NA Not Applicable <br />N - Air Resource Protection <br />N -Availability of Records <br />N - Backfill & Grading <br />N - Excess Spoil and Dev. Waste <br />NA - Explosives <br />N - Fish & Wildlife <br />R - Hydrologic Balance <br />N - Gen. Compliance With Mine Plan <br />R -Other <br />NA - Processing Waste <br />N -Roads <br />R - Reclamation Success <br />N - Revegetation <br />NA - Subsidence <br />N - Slides and Other Damage <br />N - Support Facilities On -site <br />N -Signs and Markers <br />NA - Support Facilities Not On -site <br />NA - Special Categories Of Mining <br />N - Topsoil <br />COMMENTS <br />The weather was partly cloudy; the ground was mostly dry. <br />Elizabeth Shaeffer, Howard Strand, and Spencer Shumate attended the oversight inspection for OSM. The focus <br />of the inspection was reconstruction of drainages, namely the West Ridge drainage with check dams, the Moffat <br />Final Pit Ditch, and down drains near Moffat Pond. <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 />The Moffat Final Pit Ditch and Moffat Down Drains 1, 2, 3, and 4 were inspected and found to be in good <br />shape. There was no significant erosion in the channels and they are well vegetated and stable. In Moffat Down <br />Drain 44 a small bank cut was observed and there is a short reach where flow has split into two distinct channels; <br />neither of these issues appears to be problematic. <br />One of the check dams in the West Ridge drainage was holding water (CD 12). The upper check dams are nearly <br />filled in with sediment. No significant problems were identified with the check dams, although minor bank <br />erosion was seen between CD5 and CD6, and in some locations the geo- fabric is exposed. At CD2, the spillway <br />has washed out and head cutting has occurred. <br />A gully was found east of where the West Ridge drainage crosses the West Ridge Road, near the top of the "String <br />of Pearls." This gully is the result of erosion in a roadside ditch, and it is approximately three feet deep and <br />approximately 200 yards long. There is no evidence that this gully has caused significant sediment loading into <br />the drainage below. Another, smaller gully was observed on the west side of the drainage along the old road. <br />The east side of Moffat Pond has seen significant use by sheep and the bank has been degraded. <br />Number of Partial Inspection this Fiscal Year: 2 <br />Number of Complete Inspections this Fiscal Year: 1 <br />Page 2 of 8 <br />