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FRIEDENS, PA - JUNE 08: George Dethlefsen, CEO Corsa Coal Corp., right, stands with Pennsylvania Governor Tom Wolf after they cut the ribbon at the grand opening of Corsa Coal's Acosta Deep Mine on June 8, 2017 in Friedens, Pennsylvania. The mine is expected to create more than 70 new jobs and should produce 400,000 tons of metallurgical coal a year. (Photo by Justin Merriman/Getty Images)

FRIEDENS, PA - JUNE 08: George Dethlefsen, CEO Corsa Coal Corp., right, stands with Pennsylvania Governor Tom Wolf after they cut the ribbon at the grand opening of Corsa Coal's Acosta Deep Mine on June 8, 2017 in Friedens, Pennsylvania. The mine is expected to create more than 70 new jobs and should produce 400,000 tons of metallurgical coal a year. (Photo by Justin Merriman/Getty Images)