The Bituminous coal mine maps of Pennsylvania were created by the Works Progress Administration from 1934-1938. Workers transcribed information about the extent of underground bituminous coal mines on to these maps, as well as locations of oil and gas wells. These maps are based on 15-minute topographic quadrangles, divided into nine sections. (For example, "Altoona 1" represents the northwestern corner of the Altoona 15-minute quadrangle. "Altoona 9" represents the southeastern corner of the quadrangle).
Although some mine information was never transcribed, this set provides an excellent representation of the extent of mining throughout western and central Pennsylvania.
The counties covered include Allegheny, Armstrong, Beaver, Bedford, Blair, Bradford, Butler, Cambria, Cameron, Centre, Clarion, Clearfield, Clinton, Elk, Fayette, Forest, Fulton, Greene, Huntingdon, Indiana, Jefferson, Lawrence, Lycoming, Mercer, Somerset, Sullivan, Tioga, Venango, Washington, and Westmoreland.
