2020-03-20_INSPECTION - C1981010

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Mine Site Inspection Mine Name: Trapper Mine Permittee: Trapper Mining, Inc. Permit ID#: # C-1981-010 Inspection Date: March 11 & 12, 2020 Time: 1:00 —3:00; 7:30 — 5:45 Inspection Type: Complete Oversight Inspection Weather Conditions: Cool (30's - 40's), scattered clouds, melting snow cover, muddy ground Participants: Christine Belka: Office of Surface Mining Reclamation and Enforcement(OSMRE) #182 Forrest Luke (records review only), Trapper Mining, Inc (TMI) Robin Reilley: Division of Reclamation Mining and Safety (DRMS) Graham Roberts, TMI Background /General Information Trapper is an active, producing, surface coal mine in Moffat County. In addition to active coal mining operations, TMI has a coal ash disposal pit that receives material from the adjacent Craig Station. Dragline and truck shovel operations were removing overburden in L Dip Pit during this inspection. All observed office, shop, chlorination facility, wash bays, ready line, and storage yards were orderly and well-maintained. Rule 4.02: Signs and Markers Permit identification signs contain all required info (permit number, mine and operator names, address, and phone number) and are placed, along with blasting notification signs, at all entrances to the mine site from public roads. The immediate blasting area within the permit area was appropriately marked and access controlled. Topsoil stockpile markers are in place as required. All observed sedimentation ponds had signs that were easily visible from access roads. The permit boundary is well-marked using t-posts with PVC caps labeled "P". Rule: 4.03: Roads All roads travelled were in good repair although wet and muddy due to seasonal snowmelt. Haul roads are graveled and in good condition. Many smaller access roads were snow-covered or muddy and difficult or impossible to pass. This is normal in this area this time of year and does not indicate a problem with road drainage. Scrapers were grading roads during the inspection. Rules: 4.05.5 and 4.05.6: Sediment Control Measures and Sedimentation Ponds The following sedimentation ponds were inspected or observed from the nearest access road: • Impoundment H: several Russian olive (Elaeagnus angustifolia) weed trees are well- established within embankment must be removed. These have been noted in DRMS inspection reports for several months. Mr. Roberts indicated that conditions will likely be ideal for removal in May (mud should dry allowing access and workability). • West Pyeatt: partially iced-over • Middle Pyeatt: small amount of water/ice • East Pyeatt: iced-over but discharging due to spring water flow • Grouse and Oak Ponds: frozen over. The Oak Drainage was inaccessible due to steep 1 I Page .