Archival objects in this container: Plaster mill and plaster packing, schematic diagram, undated "Quick-as-a-wink" solenoid operated air valves schematic, 1948 Rotary drill test holes, 1950-1972 and undated Annual tons crush to mill, 1992-1996 Core drilling analyses, 1977-1978 Mine plan, 1972-1995 Daily drill logs, 1951 June Drill logs, 1951-1979 and undated Ore reserves, 1967 Pit waste, 1951-1953 1972 year-end waste summary, 1972 Proposed stripping, 440 area, 1966 Mine operations notebook, 1987 Safety program manual, 1982 "Federal Surface Mining Regulations", 1978 Budget, 1987 Tractor purchase request, 1985 Equipment authorizations and vouchers, 1983-1987 Truck performance and requests, 1977-1984
