The Indiana Coal Fight Is in Federal Court, and the Capacity Costs Are Already Building on Your Bill

This story keeps developing. We first covered the Rockport coal situation in July when Indiana Michigan Power filed with the IURC for a 1,520-megawatt combined-cycle gas plant at the same Rockport site. This week's new development is a federal court filing.

On July 31st, Attorney General Todd Rokita filed a motion in Ohio federal district court to intervene in the 2007 consent decree governing the shutdown of I&M's Rockport Unit 1: a plant whose owner, American Electric Power, agreed in 2019 to close it by 2028. Governor Braun issued an executive order the same day to halt coal plant closures statewide. Sierra Club senior attorney Tony Mendoza called Rokita's filing "really late," noting I&M has already filed to build the replacement gas plant and signed a demand-response agreement with Google for its Fort Wayne data center.

Here's the contradiction at the center of this story: Rokita is trying to keep open a plant whose own owner is simultaneously planning its replacement. The state's grid reliability argument is undercut by I&M's own IURC filings.

For Indiana manufacturers, the cost pressure is already building regardless of how the court fight lands. PJM's 2025-26 base residual auction cleared roughly $14.7 billion compared to $2.2 billion in the prior auction, a $12.5 billion swing, per the Independent Market Monitor. For Indiana industrial customers on I&M or AEP tariffs, that flows through capacity cost trackers on a lag, typically hitting rate schedules over the next 12 to 24 months depending on your tariff class.

The political fight is secondary. Run two scenarios now (a 5% and a 15% all-in delivered electricity cost increase over three years) and see which capital or hedging decisions flip before the IURC proceeding forces the question.