The Indiana Department of Environmental Management, or IDEM, is writing new rules for the disposal of coal ash.
The update is part of a federal overhaul aimed at tightening regulations governing coal combustion residuals, or CCRs.
The waste, commonly referred to as coal ash, is a byproduct of burning coal for electricity.
The new rules from the U.S. Environmental Protection Agency set requirements for how electric utilities dispose of coal ash.
But the EPA leaves it up to the states to write a plan for meeting the federal requirements.