To save Pa. coal mines, officials devised a preposterous plan: Build a 137-mile tunnel - pennlive.com
Bitcoin operation ignites debate around the waste from coal mining in Pennsylvania - ABC News
Pennsylvania Could Face New Wave Of Abandoned And Hazardous Coal Mines | 90.5 WESA
Pennsylvania and the Coal Mines | The IUP Libraries Link
General Information - Pennsylvania Mines and Mining - Library Guides at Penn State University
Bootleg Mining in Centralia Pennsylvania
Penna. Historical Mining Reports
Coal In Pennsylvania - Pennsylvania Mines and Mining - Library Guides at Penn State University
AMD: Coal mining in PA
File:Coal Mining near Wadesville, New Castle Twp, Schuylkill Co PA 01.JPG - Wikimedia Commons
OPEN PIT MINING IN PA - YouTube
How one Pennsylvania company is using waste coal to mine Bitcoin
Pennsylvania-Mines
AMD: Coal mining in PA
The Woodward Coal Mine near Plymouth, Pa. which broke the world's record by mining 1,000,000 tons of coal for the year 1905 | Library of Congress
Coal Mining | Visit Johnstown Pennsylvania
Anthracite Heritage: Landscape, Memory and the Environment | Open Rivers Journal
Touring the Number 9 Coal Mine: The World's Longest-Operating Coal Mine - Uncovering PA
Dumping culm, slate pile, anthracite coal mining, Scranton, Pa. - Digital Commonwealth
Major Pa. anthracite coal mine project to be financed by $1 million grant - pennlive.com
15 Best Rare Coal Mining Photos From Pennsylvania
Mining Resources – Genealogical Society of Pennsylvania
