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III. COMMENTS -COMPLIANCE <br />Below are comments on the inspection. The comments include discussion of observations made <br />during the inspection. Comments also describe any enforcement actions taken during the inspection <br />and the facts or evidence supporting the enforcement action. <br />The final graded areas of the Wolf Creek, South Valora, and Scraper Pits were seeded in the fall <br />of 2006. Vegetation is becoming well established in most areas of Yoast South with exception of <br />the slide damaged area above Pond 012 and a portion of the drainage area above Yoast <br />Stockpond ST-2 (which has not been fully constructed). The recently re-graded lands inspected <br />all remain stable and there were no significant erosion features noted during this inspection. <br />Hydrologic Balance <br />Surface water control and sediment control is achieved in the former pit areas of Yoast South by <br />the installation of numerous permanent post-mine drainage channels, two permanent stockponds <br />and three sedimentation ponds (Ponds 012, 013, and 014). Certified designs have been approved <br />for all post-mine drainage channels, stockponds and sediment ponds. Channel construction is <br />being finalized at the Yoast Mine. With Technical Revision No. 3Q, the use of turf reinforced <br />mat lined channels was incorporated into several of the post-mine channels designs. During this <br />inspection construction of several post-mine drainages was observed. The installation of <br />composite turf reinforcement mat is shown in the attached Photograph No. 4. <br />To conclude the inspection, Sedimentation Ponds 012, 013, and 014 were inspected. Pond inlets, <br />discharge structures, and embankments were stable at all pond locations and no problems were <br />noted. Ponds 013 and 014 were retaining water but not discharging. Pond 012 was dischazging a <br />small amount of clear water at the time of this inspection. Based on the observations made <br />during this inspection, the sediment control practices are functioning as intended and no off-site <br />impacts from re-graded lands were identified. <br />