_INSPECTION - C1980007 (19) - Laserfiche WebLink

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June 19,2013 C-1980-007/West Elk Mine JRS RPE pond)was stable and clean. The ditches along the west and north sides of the RPE were also clean and stable. -The freshwater and sediment control ditches from the RPEE to the RPE pond are riprapped ditches. These ditches were well maintained and stable at the time of the inspection. The sediment ditch flows west at the bottom of the drainage (to the RPE pond) and enters a half-culvert. In May a large rock came loose from the slope above the half-culvert and crushed a portion of it. The rock has been removed and the ditch has been somewhat repaired to allow water to continue to flow until a replacement culvert arrives and is installed. There is an area below the HR-1 slide area(below this half-culvert)that is an SAE. The SAE is straw bales. The straw bales have all been replaced and the SAE appears to be functioning as designed. GENERAL MINE PLAN COMPLIANCE: -West Elk was currently mining in the E-Seam in the E4 longwall panel. They mining has progressed to station 76+00 and just passed cross-cut 40. -Development work continues in the longwall panel E5 headgate. The development was currently at station 135+20,midway between cross-cuts 70 and 71. There has been no change in the development work in the longwall panel E6 headgate(still at cross-cut 6) and the E-Seam South Mains(still at station 79+00). -Mining is progressing as permitted and shown on approved Map 51 -E-Seam Projected Operations. PROCESSING WASTE/COAL MINE WASTE PILES—Rule 4.10 and 4.11 Drainage Control; Surface Stabilization;Placement: -The RPE was stable and well graded at the time of the inspection. There was no water pooling on the surface of the pile and the pile was graded to allow for adequate runoff to the perimeter ditches. There were a few piles of uncompacted refuse on the pile at the time of the inspection. The area on the east side of the pile that was excavated in the spring and early summer has been filled. He reclaimed surfaces of the RPE were well vegetated and stable and no erosional problems were noted. -The RPEE was active at the time of the inspection. The operator was hauling, spreading and compacting refuse at the time of the inspection. They were currently working on the fourth lift of the pile. There were numerous piles of uncompacted refuse on the pile but the operator was actively working the pile. The underdrain has been extended up the drainage to allow for additional refuse placement in this area. The operator was also working on the Phase IB of the rock buttress. They were using a loader and excavator to place rock on the buttress. Much of the rock is coming from rock scaling work being performed by CDOT along McClure Pass. ROADS—Rule 4.03 Construction 4.03.1(3)/4.03.2(3)Drainage 4.03.1(4)/4.03.2(4) Surfacing and Maintenance 4.03.1(5) and(6)/4.03.2(5)and(6) Reclamation 4.03.1(7)/4.03.2(7): -The road segment in Box canyon between the entrance gate and the first drill pad(for MDWs19-07 and 19-08) was well graded and stable,with no erosional problems noted at the time of the inspection. The road was steep and blended well with the surrounding undisturbed land. Slash material was placed along the road to limit access and to help control erosion. There was positive drainage on the road and no sediment was observed in the undisturbed area. There was a good amount of first-year growth with perennial grasses and forbs present. There was some Canadian and musk thistle noted on the road. This will need to be sprayed. Although not a Phase I Bond Release criterion, all of the stripped topsoil has been replaced on this road segment. No topsoil depth measurements were taken as all stripped topsoil on light-use roads is stockpiled locally and replaced to that same Number of Partial Inspection this Fiscal Year: 9 Number of Complete Inspections this Fiscal Year: 4 Page 9 of 53