COAL MINE ENTRIES --
Entrances to Underground Coal Mines, 20071231 (1:24,000)
Shows the locations of entrances to underground coal mines that have operated in the coal region of Indiana since the mid-1800s. Includes information on entrance type (hoist shaft, other shafts, slope, unknown), depth, mine number, and source information (map number).
Derived from the Indiana Coal Mine Information System (CMIS).
FGDC metadata: COAL_MINE_ENTRIES_IN