Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 139

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 1
Chunk 139
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)Portion of Ameren’s 2024 Operating Revenues(a)Ameren MissouriElectric service(b)MoPSCJune 2023July 2023(c)(c)(c)50%Natural gas delivery serviceMoPSCDecember 2021February 2022(d)(d)$0.32%Ameren IllinoisElectric distribution delivery service(e)ICCDecember 2024(e)8.72%50.00%(e)27%Natural gas delivery service(f)ICCNovember 2023November 20239.44%50.00%$2.812%Electric transmission service(g)FERC(g)January 202510.48%54.91%$4.46%ATXIElectric transmission service(g)FERC(g)January 202510.48%60.08%$1.63%

(a)Includes pass-through costs recovered from customers, such as purchased power for electric distribution delivery service and natural gas purchased for resale for natural gas delivery service, and intercompany eliminations.

(b)Ameren Missouri’s electric generation, transmission, and delivery service rates are bundled together and charged to retail customers under a combined electric service rate. Because the bundled rates charged to MoPSC retail customers include the revenue requirement associated with Ameren Missouri's FERC-regulated transmission services, the table above does not separately reflect a FERC-authorized rate base or allowed ROE.

(c)This rate order did not specify an ROE, capital structure, or rate base.

(d)This rate order did not specify an ROE or a capital structure.

(e)In December 2024, the ICC issued an order in Ameren Illinois’ MYRP proceeding. The order approved an average annual rate base for 2024, 2025, 2026, and 2027 of $4.2 billion, $4.4 billion, $4.6 billion, and $4.8 billion, respectively. Rate changes consistent with the December 2024 order became effective in late December 2024. Under an MYRP, Ameren Illinois will reconcile its actual revenue requirement, as adjusted for certain cost variations, to ICC-approved electric distribution service rates on an annual basis, subject to a reconciliation cap. The reconciliation cap limits the annual adjustment to 105% of the annual revenue requirement approved by the ICC.

(f)This rate order was based on a 2024 future test year.

(g)Transmission rates are updated annually and become effective each January. They are determined by a