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21 April, 2017 C-1981-010/Trapper Mine RAR <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 10 <br />Number of Complete Inspections this Fiscal Year: 3 <br /> <br /> Page 3 of 9 <br /> <br />Culvert Maintenance Comments Size <br /> <br />A9 <br />Sediment plug on inlet side. Badger hole on bank <br />@ outlet caused a sediment plug. Both inlet and <br />outlet sides require cleaning. <br />48 <br />A10 Sloughing of slope at outfall 48 <br />A12 Both inlet and outlet require cleaning. 36 <br />SAH1 Sloughing of slope at outfall 24 <br />ASH1 Sloughing of slope at outfall <br />A2 Needs cleaning on inlet side and channel on outlet <br />side requires deepening. 60 <br />A4 Sediment deposition and, grasses growing at <br />outfall 48 <br />A5 Culverts require cleaning 48 <br />GRS1 Inlet and outlet need cleaning 24 <br />GRS2 Sediment at outfall requires removal 48 <br />SA4A Update culvert size in permit renewal to 48" 48 (36) <br />SA7 <br />Update culvert size in permit renewal to 36". <br />Culvert bottom is perforated at discharge end <br />about 8 feet in, requiring repair. <br />36 (30) <br />SA4A <br />Water exiting culvert through bottom about 8 feet <br />back from discharge end causing channel <br />undercutting. <br />36 <br />SA2 Water exiting culvert through bottom about 23 feet <br />back from discharge end, requiring repair. 48 <br />SA1 <br />East culvert not draining due to grasses near <br />discharge site. Both culverts exhibited deposition <br />inside the culvert that requires removal. <br />48 <br />AE7 Culvert more than half full of sediment. 24 <br />EMF1 Runoff not flowing over armored channel causing <br />channel side cutting. Rock in channel is too large. 36 <br /> <br />INSPECTION: <br /> <br />GENERAL MINE PLAN COMPLIANCE: <br />Ash was being hauled to the ash pit. The excavator was loading coal and 100 ton haul trucks <br />were operating. The Molly Brown was operating casting spoil in the K pit. An overburden <br />drill was active. Benches were being regraded to approximate original contour, (photo). The <br />stripped area East of the L pit is ready to blast within the next few weeks (photo 1, below). <br />