A $4 billion plan to rid a $5.5-billion coal ash mine in Kentucky of carbon dioxide emissions could cost the company billions of dollars.
A federal judge last month ordered a coal ash removal plan approved by the coal mining company, PGE, to proceed.
The federal government has given PGE until Nov. 29 to submit a plan for the project.
The judge said in the order that the company must submit the plan by Dec. 13.
The Environmental Protection Agency and the Kentucky Department of Environmental Quality are now investigating whether the plan violated state environmental laws, which require that all coal ash be removed by a federal agency.
The coal ash in the coal mine, which is owned by the Commonwealth Coal Company, is a waste of time, said Mike McBride, spokesman for the Kentucky Environmental Council.
He said he expects PGE to have a plan by the end of this week.
The state said in a statement it will seek a stay of the judge’s order pending the results of the EPA investigation.