Coal Combustion Residuals (CCR) Part B Implementation

The CCR Part B Final Rule, published on November 12, 2020, allowed a limited number of facilities to demonstrate to EPA or a Participating State Director that, based on groundwater data and the design of a particular surface impoundment, the unit has and will continue to ensure there is no reasonable probability of adverse effects to human health and the environment. The regulations state that facilities had until November 30, 2020 to submit applications to EPA for approval, but since the effective date for the final rule was December 14, 2020, EPA accepted revisions or applications until December 14, 2020. EPA is updating this webpage with the current status of the demonstrations received in the table below.

This information is current as of 11/18/2025

On this page:

• EPA's Review of Submitted Demonstrations
• Facilities that Have Submitted Demonstrations for Alternate Liners
• Information about the November 30, 2021 deadline 
• EPA Contact Information

EPA's Review of Submitted Demonstrations

On January 11, 2022, EPA determined that the seven applications were complete, and one facility withdrew its application. Another facility withdrew its application in the fall of 2022. Five more facilities withdrew their applications in 2023 and 2024.

Coronado Generating Station’s Application

On January 16, 2025, EPA announced the denial of the alternate liner demonstration application Coronado Generating Station in St. Johns, Apache County, Arizona, submitted in 2020. The decision advances EPA’s commitment to protect groundwater from coal ash contamination. EPA denied the application because Coronado Generating Station failed to demonstrate that their surface impoundment complies with applicable requirements of the CCR regulations.

• Read the denial in the docket.

On March 20, 2025, EPA approved the Salt River Project’s request to extend the deadline to cease using the Coronado Generating Station Evaporation Pond due to grid reliability and resource adequacy concerns. To allow time for design, permit, and construction of alternative disposal capacity, the new deadline is September 30, 2026.  Read through the extension approval letter. (pdf) (148.62 KB) . 

On April 25, 2025, Salt River Project requested a rescission of the January 2025 decision and have an opportunity to address and resolve any concerns on the Part B application and demonstration. On September 10, 2025, EPA responded to Salt River Project’s request to rescind and stated that it intends to issue a proposal to rescind the denial and to approve the alternate demonstration.  Read EPA's response letter (pdf) (340.61 KB) . 

EPA Proposed Six Determinations

On January 25, 2023, EPA proposed determinations on six Part B demonstrations. All six proposals are proposed denials. The comment periods began on February 8, 2023, when the proposed determinations were posted in Regulations.gov. EPA extended the comment period deadline to April 10, 2023. Access the proposed determinations in the memos opening the dockets for public comments:

• Belle River Power Plant, China Township, Michigan.
• Coal Creek Station in Underwood, North Dakota.
• Conemaugh Generating Station in New Florence, Pennsylvania.
• Coronado Generating Station in St. Johns, Apache County, Arizona.
• Martin Lake Steam Electric Station in Tatum, Texas.
• Monroe Power Plant, Monroe, Michigan.

Read the announcement of these proposals.

Facilities that Have Submitted Alternate Liner Demonstrations

Information about the November 30, 2021 Deadline

Under the Part B rule, facilities with an approved application to conduct an alternative liner demonstration have until November 30, 2021 to conduct the work and submit that demonstration. As EPA has not yet issued approvals and denials for submitted Part B applications, the time to conduct the demonstration work is narrowing, such that a facility may have difficulty completing the demonstration in the time between an approval and the November 30, 2021 deadline. Below is a frequent question about this deadline:

Question: Does the delay in EPA’s issuing decisions make it such that facilities will need to perform the work for a demonstration without knowledge of whether their applications are approved or denied?

Response: EPA is aware of this issue, which has arisen as a result of unanticipated delays in making determinations on the Part B applications that have been submitted. EPA is weighing possible solutions to this issue and intends to take actions to ensure that any facility approved to conduct a demonstration has the same amount of time anticipated by the current regulation to initiate and complete the demonstration after an approval.

EPA Contact Information

If you have any questions regarding demonstration package submissions, contact:

Michelle Lloyd at Lloyd.Michelle@epa.gov or 202-566-0560
Jason Mills at Mills.Jason@epa.gov or 202-566-0215