EPA Greenhouse Gas Repeal: Does Coal Extension Lower Indiana Electricity Prices?

EPA Administrator Lee Zeldin finalized the repeal of the Biden administration's requirement that existing coal plants and new natural gas plants control 90% of their carbon dioxide emissions. The announcement was made Monday at the G20 energy ministers meeting in Houston: against the backdrop of Indiana's Gibson Generating Station in Princeton, Duke Energy Indiana's 3,132-megawatt facility, which had already proposed extending its operating life to 2038.

The administration's cost-reduction argument has a direct problem. EIA's most recent delivered-fuel data shows coal generation costs running materially above combined-cycle gas in the MISO footprint. That cuts against the rationale for extending coal on cost grounds. Duke is betting on extended coal capital costs flowing through its HEA 1002 rate cases. NIPSCO is exiting coal entirely by 2028. Those are materially different long-term cost and risk profiles, and which utility serves your site is not an abstract question.

For Indiana manufacturers with European export exposure, the EU's Carbon Border Adjustment Mechanism is phasing in regardless of what Washington does. If you export CBAM-covered goods to the EU (primarily steel, aluminum, cement, fertilizers, or hydrogen) embedded emissions from your electricity supply factor into the certificate cost. Indiana's grid mix makes that exposure worse than a European competitor's. If you are outside those covered categories today, assess your exposure now; the covered-goods list is expanding. Factor the Duke-versus-NIPSCO trajectory into your next procurement cycle accordingly.