UNDERGROUND MINES --
Underground Coal Mines, 20091231 (1:24,000)
Shows the locations and extents of underground coal mines. Includes locations
for all documented underground mines that operated in Indiana since the late
1800s. Mines can be differentiated based on mine type, mine number, source information,
and dates of mining.
Original source information includes company mine maps, field maps and notes
of IGS geologists, IGS publications, and Indiana State Mine Inspector Reports.
FGDC metadata: COAL_MINE_UNDERGROUND_IN