Company: TVC
Filing Date: 2025-11-13
Form Type: 10-K
Source: 0001376986-25-000056
Chunk: 35

Company: Tennessee Valley Authority
Filing Date: 2025-11-13
Form: 10-K
Item: Item 6
Chunk 35
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.  In compliance with the CCR Rule, TVA published the results of the 2024 groundwater testing at its CCR facilities during the second quarter of 2025.  Similar to prior years, the tests identified certain CCR units with constituents at statistically significant levels above site-specific groundwater protection standards.  TVA has completed an assessment of corrective measures ("ACM"), which analyzes the effectiveness of potential corrective actions, and has published ACM reports to its CCR Rule Compliance Data and Information website.  Based on the results of the ACM, TVA is required to 

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select a remedy as soon as feasible.  TVA has selected remedies for two of its plants: a groundwater pump and treat system at the Allen East Ash Disposal Area and monitored natural attenuation at Shawnee.  TVA continues to investigate and evaluate remedies for its other plants and will continue posting semi-annual progress reports on the status of remedy selection until the final remedy is selected.  The cost of these final remedies cannot reasonably be predicted until investigations and evaluations are complete and remedial methods are selected.

The final Part A revision to the CCR Rule became effective September 28, 2020.  Among other things, the final Part A rule requires unlined CCR surface impoundments to stop receiving CCR and non-CCR waste streams and to initiate closure or retrofit by no later than April 11, 2021.  TVA ceased sending CCR and non-CCR waste streams to, and initiated closure of, unlined CCR surface impoundments by the specified deadline.

As of September 30, 2025, TVA had spent approximately $3.5 billion on its CCR Program.  Through 2030, TVA expects to spend an additional $2.1 billion on the CCR Program.  Estimates for these amounts and costs after 2030 may change depending on the final closure method selected for each facility.  While the conversion portion of the CCR Program is completed, TVA will continue to undertake CCR closure and storage projects, including building new landfill cells under existing permits and closing existing cells once they reach capacity.

    TVA was involved in two lawsuits concerning the CCR facilities at Gallatin.  One case was resolved by the entry of a consent order, under which TVA agreed to close the existing ash facility by removal, either to an on-site landfill or to an offsite facility.  The removal plan and the Environmental Assessment Report ("EAR") were approved by