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Talen Energy Corp

For the period ended Sep 30, 2024. Filed Nov 14, 2024.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2024 · Filed Nov 14, 2024

TLN$361.18-0.5%Stored close · as of Nov 10, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

9. Asset Retirement Obligations and Accrued Environmental Costs

  1. Asset Retirement Obligations and Accrued Environmental Costs
Successor
September 30, 2024December 31, 2023
Asset retirement obligations$495$464
Accrued environmental costs2223
Total asset retirement obligations and accrued environmental costs517487
Less: asset retirement obligations and accrued environmental costs due within one year (a)4218
Asset retirement obligations and accrued environmental costs due after one year$475$469

(a)Presented as “Other current liabilities” on the Consolidated Balance Sheets.

Asset Retirement Obligations

The changes of the ARO carrying value were:

ARO Rollforward
Carrying value, December 31, 2023 (Successor)$464
Obligations settled(9)
Accretion expense40
Carrying value, September 30, 2024 (Successor)$495

Supplemental information for the ARO:

Successor
September 30, 2024December 31,2023
Supplemental Information
Nuclear (a)$234$214
Non-Nuclear (b)261250
Carrying value$495$464

(a)Obligations are expected to be settled with available funds in the NDT at the time of decommissioning. See Note 12 for additional information on the NDT.

(b)Certain obligations are: (i) partially supported by surety bonds, some of which have been collateralized with cash and (or) LCs; or (ii) partially prefunded under phased installment agreements.

As a result of environmental regulations issued by the EPA or other rule-making entities, the Company may be required to revise and (or) recognize new AROs. See “Environmental Matters” in Note 10 for additional information. See “Talen Montana Financial Assurance” in Note 10 for information on Talen Montana’s requirement to provide financial assurance for certain environmental decommissioning and remediation liabilities related to Colstrip.

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