US Federal Regulation
Hazardous and Solid Waste Management System: Disposal of Coal Combustion Residuals From Electric Utilities; Extension of an Alternative Closure Requirement Deadline
This item sits inside Zelica’s Battery & Grid Storage house board.
Key metadata
- Document number
- 2025-21597
- Type
- Proposed Rule
- Publication date
- 2025-11-28
- Agencies
- Environmental Protection Agency
- CFR references
- 40 CFR part 257
- Original source
- Federal Register
EPA Proposes Coal Ash Deadline Extension to Support Grid Reliability, Comments Due Jan 7, 2026 (US)
The Environmental Protection Agency (EPA) is proposing to extend a key compliance deadline for certain coal-fired power plants. Specifically, the deadline for owners and operators to complete closure of their unlined coal ash (CCR) surface impoundments larger than 40 acres would be pushed back by three years, from October 17, 2028, to October 17, 2031.
Why it matters
This extension is intended to promote electric grid reliability by allowing a subset of coal-fired power plants to continue operating beyond their currently scheduled retirement dates. For battery storage and other clean electricity technologies, this means a slight delay in the immediate pressure to replace this specific segment of coal-fired generation capacity. While the long-term transition to clean energy remains, this proposal could temporarily reduce the urgency for certain grid infrastructure upgrades, transmission projects, and new generation interconnections that would otherwise be driven by these specific coal plant retirements. It provides a temporary reprieve for the grid to manage the transition, potentially impacting the timing of some new battery storage deployments aimed at replacing these particular coal assets.
Who is affected
Owners and operators of coal-fired power plants with large, unlined coal ash impoundments that were previously facing the 2028 closure deadline. Indirectly, the broader electric grid, energy developers, and communities reliant on these plants for power.
Key timing
Comments on this proposed rule are due by January 7, 2026. A virtual public hearing will be held on January 6, 2026.
Want the broader context around this item? The Battery & Grid Storage board combines curated notes, trackers, and linked signals in one working view.