Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 254

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 7
Chunk 254
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 a decrease in the allowed base ROE under the MISO tariff resulting from the October 2024 FERC order, which included customer refunds for certain historical periods (-$10 million). See Note 2 – Rate and Regulatory Matters under Part II, Item 8, of this report for additional information regarding the FERC complaint cases.

Ameren Missouri

Ameren Missouri’s electric revenues increased $153 million, or 4%, in 2024, compared with 2023.

The following items had a favorable effect on Ameren Missouri’s electric revenues in 2024, compared with 2023:

•“Off-system sales, capacity, transmission, and FAC revenues, net” increased $96 million, primarily due to higher summer and fall capacity prices which were set by annual MISO auctions.

•Higher electric base rates, resulting from the June 2023 MoPSC electric rate order effective July 9, 2023, increased revenues an estimated $62 million.

•Excluding the estimated effects of weather and the MEEIA customer energy-efficiency programs, electric revenues increased an estimated $27 million, due to an increase in residential customer counts, retail sales volumes from large commercial and industrial customers, the absence of customer outages resulting from major storms experienced throughout the service territory in July and August 2023, and an additional day in 2024 as a result of the leap year. The increase is partially offset by lower realized prices due to changes in customer usage patterns and economic development discounts.

•Revenues associated with other cost recovery mechanisms increased $22 million, primarily due to an increase in RESRAM revenues and an increase in excise taxes due to increased retail sales revenue.

•Other revenues increased $6 million due to pole rents (+$2 million), other rentals (+$2 million), and other miscellaneous revenues 

(+$2 million).

•The aggregate effect of weather increased revenues an estimated $3 million as cooling degree days increased 7% and heating degree days decreased 4%.

The following items had an unfavorable effect on Ameren Missouri’s electric revenues in 2024, compared with 2023:

•Revenues associated with “Cost recovery mechanisms – offset in fuel and purchased power” decreased $54 million, due to decreased revenue related to the amortization of costs previously deferred under the FAC that were reflected in customer rates. The changes to “Cost recovery mechanisms - offset in fuel and purchased power” are fully offset by changes to “Cost recovery mechanisms -