see more

FRIEDENS, PA - JUNE 08: Mining operations are underway at Corsa Coal's Acosta Deep Mine on June 8, 2017 in Friedens, Pennsylvania. The mine, which celebrated its grand opening Thursday, is expected to create more than 70 new jobs and should produce 400,000 tons of metallurgical coal a year. Coal mining operations began on Wednesday. (Photo by Justin Merriman/Getty Images)

FRIEDENS, PA - JUNE 08: Mining operations are underway at Corsa Coal's Acosta Deep Mine on June 8, 2017 in Friedens, Pennsylvania. The mine, which celebrated its grand opening Thursday, is expected to create more than 70 new jobs and should produce 400,000 tons of metallurgical coal a year. Coal mining operations began on Wednesday. (Photo by Justin Merriman/Getty Images)