A recent report for the coal mining industry indicates the cleanup funds of some states in underfunded by a significant amount. Citing Ohio as a representative example, the report shows that when companies recalculated the potential cost to clean up every active mining site in Ohio, there was an 11% shortage of over $500 million.

An advisory board in charge of overseeing the state’s coal mining reclamation fund met Thursday to review those figures in the latest draft of an actuarial report which is due on the governor’s desk by June 30.