_INSPECTION - C1981012 (18) - Laserfiche WebLink

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June 27,2013 C-1981-012/New Elk Mine RDZ The following culverts were inspected(in chronological order): the culverts southeast of Pond 007A,C48, C59,C17,C17A,C12A,C73,C16A,C13,C30 and nearby culvert to east, C-A,C45, C39,C40, C81, C41, C3, and C37. Most of the culverts meet the PAP specifications and are functional,requiring no immediate maintenance. Some repair and maintenance is required: • One of the culverts southeast of Pond 007A requires cleaning. • C17 requires minor vegetation removal at the lower end. • C73 is full of sediment, and ditch D15 needs to be deeper. • C16A needs to be replaced. • Culvert C30 has been replaced and a new culvert to the east has been added(under the road to State Highway 12). • C-A and C81 require minor cleaning. • Replacement of C41 is not complete. Also,there is a gully above the downstream end of the culvert,which should be monitored to make sure it does not head cut too close to the conveyor. • Part of C3 has been constructed (the upstream portion) and part of it(the lower portion) still needs to be replaced. • C37 requires cleaning, mostly at the upstream end. The following ditches were inspected(in chronological order): D26,D24A,D23,D22,D16,D15,DI7A, D1713,D10,D12,D19,D14,D56, and the ditch along the west side of the Refuse Disposal Area(RDA). The following was observed regarding the ditches: • Ditch D26 has been cleaned,and the water pipe that was causing an obstruction has been removed. • Water was flowing in ditch D23, and was very clear. The source of this,per Mr. Thompson,is a sump in the pedestrian tunnel. • The upper portion of D22 is smaller than the specification in the PAP. However,this does not appear to be a problem as it is below the confluence with ditch D32 and drains a small area. It should be monitored in the future. • Ditch D16 has been cleaned. • Ditch D15 needs to be cleaned. • Ditch D17B requires more definition near the fan. • The outfall for ditch D I O has been constructed. Many of the rocks in the riprap apron are greater than three feet in diameter. NECC will hydromulch the banks in the ditch above this outfall during the summer of 2013,per Mr.Thompson. • Based on a comparison to the specification in the PAP, ditch D12 is too shallow and narrow for much of its length, and NECC needs to address this problem. • D19 has been cleaned and hydromulched. • D56 is not well defined, and the direction of flow is unclear(map could be wrong). Best Management Practices for sediment and erosion control for two SAES were inspected. Near Pond 007A the silt fence was functioning properly. The silt fence near culvert C30 requires maintenance. GENERAL MINE PLAN COMPLIANCE: The mine was generally found to be in compliance with the mine plan. Number of Partial Inspection this Fiscal Year: 8 Number of Complete Inspections this Fiscal Year: 4 Page 3 of 11