Pittsburgh Coalfield

The Pittsburgh Coalfield (Pittsburgh Coal Region) is the largest of the Western Pennsylvania coalfields. It includes all or part of Allegheny, Fayette, Greene, Washington, and Westmoreland Counties in Pennsylvania. Coal has been mined in Pittsburgh since the 18th century. U.S. Steel and Bethlehem Steel owned Karen, Maple Creek, and Ellsworth mines. It is not possible to define sharp geographical boundaries for this district for none such exist or are reported differently.{{cite book | last = J. Peter Lesley | title = Annual Report of the Geological Survey of Pennsylvania for 1885-1887 | publisher = Board of Commissioners for the Geological survey | date = 1887 | location = Original from the University of Michigan | url = https://archive.org/details/annualreportgeo02leslgoog | page = [https://archive.org/details/annualreportgeo02leslgoog/page/n147 113] | quote = monroeville coal mine. }} The largest company in this field was the Pittsburgh Coal Company, which later became CONSOL Energy.{{cite web | title = Pittsburgh Field | work = Coalfields of the Appalachian Mountains | url = http://www.coalcampusa.com/westpa/pittsburgh/pittsburgh.htm | access-date = 2007-11-18 }} It is bordered on the west by the state of West Virginia, on the south by Panhandle Coalfield and Klondike Coalfield, on the East by Irwin Gas Coalfield, on the North by the Freeport Coalfield and at least one other coalfield. The Darr Mine Disaster occurred in this coalfield in 1907.