Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 261

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 7
Chunk 261
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 this report for more information.

•The absence in 2024 of the recognition of regulatory assets for previously expensed costs approved for recovery pursuant to the June 2023 MoPSC rate order increased expenses $15 million.

•Individually insignificant increases of $7 million in various other operations and maintenance expenses, including other labor, cloud computing costs, and a decrease in the cash surrender value of COLI.

•The absence of previously deferred expenses increased expense by $7 million.

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•Legal and administrative expenses increased by $6 million, primarily related to environmental matters.

•Costs for injuries and damages increased $4 million, primarily due to an increase in claims.

•Renewable development costs increased $3 million, primarily due to the absence in 2024 of the MoPSC order approving CCNs for the Boomtown and Huck Finn energy centers in the first half of 2023 that led to increased capitalization of renewable development costs pursuant to anticipated recovery from customers.

The following items partially offset the above increases in other operations and maintenance expenses between years:

•Pension and benefit costs decreased $20 million because of a lower base level of expenses, subject to a tracker, included in customer rates pursuant to the June 2023 MoPSC electric rate order. See Note 10 - Retirement Benefits under Part II, Item 8, of this report for more information.

•Energy center maintenance decreased $17 million, primarily because of lower amortization of Callaway Energy Center refueling and maintenance costs resulting from cost saving initiatives in the fall 2023 outage, compared to the spring 2022 outage, and lower headcount.

•Transmission and distribution storm-related costs decreased $10 million because of the major storms experienced throughout the service territory in July and August 2023.

•Transmission and distribution expenditures, excluding major storm-related costs, decreased $8 million, primarily due to reduced levels of vegetation management expenditures and lower inspection costs from decreased use of contractors, and lower headcount.

Ameren Illinois

Other operations and maintenance expenses increased $88 million at Ameren Illinois in 2024, compared with 2023, as discussed below. 

Ameren Illinois Electric Distribution

Other operations and maintenance increased $87 million in 2024, compared with 2023, was primarily due to the following items:

•Bad debt costs increased $52 million, primarily because of a higher base level of expenses included in customer rates pursuant to the associated