Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 256

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 7
Chunk 256
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 average of the monthly yields of the 30-year United States Treasury bonds plus 580 basis points (9.84% as of December 31, 2023).

•The recovery of labor and benefit costs for crews assisting other utilities with power restoration efforts, primarily caused by hurricane damage, increased revenues by $3 million.

Ameren Illinois Transmission

Ameren Illinois Transmission’s revenues increased $84 million, or 18%, in 2024, compared with 2023. Base rate revenues were favorably affected by higher recoverable expenses (+$58 million) and increased capital investment (+$33 million), as evidenced by a 17% increase in rate base used to calculate the revenue requirement. Base rate revenues were unfavorably affected by 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 (-$7 million). See Note 2 – Rate and Regulatory Matters under Part II, Item 8, of this report for additional information regarding the FERC ROE complaint cases.

Natural Gas Revenues

Ameren

Ameren’s natural gas revenues increased $22 million, or 2%, in 2024, compared with 2023, due to increased revenues at Ameren Illinois Natural Gas, partially offset by decreased revenues at Ameren Missouri, as discussed below.

Ameren Missouri

Ameren Missouri’s natural gas revenues decreased $19 million, or 12%, in 2024, compared with 2023. Revenues associated with “Cost recovery mechanisms – offset in natural gas purchased for resale” decreased $20 million in 2024, compared with 2023, due to lower commodity prices and the absence of amortization of natural gas costs deferred under the PGA related to the extremely cold weather in mid-February 2021. Changes in natural gas revenues under the PGA are fully offset by corresponding changes in natural gas purchased for resale expenses.

Ameren Illinois Natural Gas

Ameren Illinois Natural Gas’ revenues increased $41 million, or 5%, in 2024, compared with 2023. Revenues increased an estimated $47 million due to higher natural gas base rates as a result of the November 2023 natural gas rate order, and revenues associated with other cost recovery mechanisms increased $7 million primarily due to increased revenues for excise taxes. “Cost recovery mechanisms – offset in natural gas purchased for resale” decreased revenues $