Company: AILIM
Filing Date: 2025-05-05
Form Type: 10-Q
Source: 0001002910-25-000098
Chunk: 118

Company: Ameren Illinois Co
Filing Date: 2025-05-05
Form: 10-Q
Item: Part I, Item 1
Chunk 118
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 taken to comply with the CEJA. 

•Storm-related costs, including related amortizations of previously deferred balances, increased $2 million due to major storms experienced throughout its service territory in January and March 2025.

Ameren Illinois Natural Gas

Other operations and maintenance costs decreased $3 million in the three months ended March 31, 2025, primarily due to a decrease in labor expense resulting from steps taken to align operations and maintenance expense as a result of the November 2023 ICC natural gas rate order. 

Ameren Illinois Transmission

Other operations and maintenance expenses were comparable between periods.

51

Depreciation and Amortization Expenses

Increase (Decrease) by SegmentTotal by Segment(a)Overall Ameren Increase of $6 Million

(a)Includes other/intersegment eliminations of $2 million and $1 million in the three months ended March 31, 2025 and 2024, respectively.    

Ameren MissouriAmeren Illinois Natural GasOther/Intersegment EliminationsAmeren Illinois Electric DistributionAmeren Transmission

Depreciation and amortization expenses increased $6 million in the three months ended March 31, 2025, compared with the year-ago period, at Ameren and Ameren Illinois, respectively, primarily because of an increase of $9 million at Ameren Transmission due to additional property, plant, and equipment investments. Depreciation and amortization expenses decreased $1 million at Ameren Missouri in the three months ended March 31, 2025. Ameren’s and Ameren Missouri’s depreciation and amortization expenses for the three months ended March 31, 2025, compared with the year-ago period, were affected by the following, which include the effect of the additional investments at Ameren Missouri:

•Depreciation and amortization expenses reflected a deferral to a regulatory asset of depreciation and amortization associated with investments in eligible property, plant, and equipment not yet included in base rates, pursuant to PISA and RESRAM, which decreased depreciation and amortization expenses by $10 million.

•The amortization of a regulatory asset associated with the securitization of Ameren Missouri’s Rush Island Energy Center increased depreciation and amortization expenses by $6 million.

•The lower net under-recovery of RESRAM eligible expenses increased depreciation and amortization expenses by $3 million.

52

Taxes Other Than Income Taxes

Increase (Decrease) by SegmentTotal by Segment(a)Overall