ALLIANT ENERGY CORP
For the period ended Dec 31, 2023. Filed Feb 16, 2024.
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FY2023 · Filed Feb 16, 2024
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14. Asset Retirement Obligations
NOTE 14. ASSET RETIREMENT OBLIGATIONS
Recognized AROs relate to legal obligations for the removal, closure, dismantlement and management of several assets including, but not limited to, wind farms, active ash landfills, ash ponds, solar generation, above ground storage tanks and batteries. Recognized AROs also include legal obligations for the management and final disposition of asbestos and polychlorinated biphenyls. AROs are recorded in “Other current liabilities” and “Other liabilities” on the balance sheets. Refer to Note 2 for information regarding regulatory assets related to AROs. A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
| Alliant Energy | IPL | WPL | ||||
|---|---|---|---|---|---|---|
| 2023 | 2022 | 2023 | 2022 | 2023 | 2022 | |
| Balance, January 1 | $279 | $294 | $195 | $213 | $84 | $81 |
| Revisions in estimated cash flows | (6) | 19 | (9) | 15 | 3 | 4 |
| Liabilities settled | (51) | (48) | (44) | (39) | (7) | (9) |
| Liabilities incurred | 16 | 6 | 1 | — | 15 | 6 |
| Accretion expense | 8 | 8 | 5 | 6 | 3 | 2 |
| Balance, December 31 | $246 | $279 | $148 | $195 | $98 | $84 |
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