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FERC Combined Filings - Electric Corporate, Wholesale Generators, Rate Filings

FERC received multiple electric corporate, exempt wholesale generator, and electric rate filings between April 13-15, 2026. Filings include a Section 203 joint application supplement from AEP Indiana Michigan Transmission Company and Mammoth North LLC, self-certification notices from renewable energy companies, and numerous market-based rate tariff revisions under Section 205(d) from wind, solar, and hydro generators. Comment deadlines range from April 23 to May 6, 2026.

Ameren and Southern Illinois Electric Joint Petition for Approval of Amendment 14

Ameren Illinois Company and Southern Illinois Electric Cooperative, Inc. filed a Joint Petition with the Illinois Commerce Commission seeking approval of Amendment 14 under the Electric Suppliers Act. The petition was filed on April 14, 2026, and has been assigned Docket Number P2026-0344. The case is currently in initial status with an Administrative Law Judge action pending.