Company: EAI
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0000065984-25-000012
Chunk: 117

Company: ENTERGY ARKANSAS, LLC
Filing Date: 2025-02-18
Form: 10-K
Item: Item 1A
Chunk 117
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 resulted in the EPA’s continuing review of the rules.  Consequently, the nature and cost of additional corrective action requirements may depend, in part, on the outcome of the litigation and further EPA review.  Given the complexity and recency of the EPA guidance, Entergy is still evaluating the level of work that will ultimately be required to comply with the 2024 CCR Rule.  Based on initial estimates of multiple possible remediation scenarios, Entergy recorded in 2024 a $42 million increase in its decommissioning cost liabilities for White Bluff and 

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Table of ContentsPart I Item 1Entergy Corporation, Utility operating companies, and System Energy

Independence, along with corresponding increases in the related asset retirement cost assets that will be depreciated over the remaining useful lives of the unit.  Entergy will continue to update the asset retirement obligation as the requirements of the 2024 CCR Rule are clarified.  As of December 31, 2024, Entergy has recorded asset retirement obligations related to CCR management of $73 million.  Additionally, all three sites (White Bluff, Independence, and Nelson) are preparing to implement measures to meet the new and updated Effluent Limitation Guidelines discussed below.

Clean Water Act

The 1972 amendments to the Federal Water Pollution Control Act (known as the Clean Water Act) provide the statutory basis for the National Pollutant Discharge Elimination System permit program, section 402, and the basic structure for regulating the discharge of pollutants from point sources to waters of the United States.  The Clean Water Act requires virtually all discharges of pollutants to waters of the United States to be permitted.  Section 316(b) of the Clean Water Act regulates cooling water intake structures, section 401 of the Clean Water Act requires a water quality certification from the state in support of certain federal actions and approvals, and section 404 of the Clean Water Act regulates the dredge and fill of waters of the United States, including jurisdictional wetlands.

Federal Jurisdiction of Waters of the United States

In June 2020 the EPA’s revised definition of waters of the United States in the Navigable Waters Protection Rule (NWPR) became effective, narrowing the scope of Clean Water Act jurisdiction, as compared to a 2015 definition which had been stayed by several federal courts.  In August 2021 a federal district court vacated and remanded the NWPR for further consideration.  The EPA and the U.S. Army Corps of