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COAL_MINE_UNDERGROUND_DNR_IN.SHP provides the locations of all documented underground coal mines that have operated in the coal region of Indiana since the mid-1880s, up to December 31, 2016. COAL_MINE_UNDERGROUND_DNR_IN.SHP is attributed with mine number (IDNR), map number (IDNR), start dates, and end dates. The following is excerpted from the metadata provided by IDNR, Division of Reclamation, for the source point feature class named \"SURFACE_AFFECTED\": \"Coal_Mine_Underground_DNR_IN is a polygon-based ESRI ArcGIS shapefile that shows the location and extent of underground coal mines in the coal region of west-central and southwestern Indiana. Coal_Mine_Underground_DNR_IN includes mine locations from documented underground mines that operated in Indiana since the late 1800s. 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