Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 230

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 2
Chunk 230
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, Moberly, and Moreau energy centers are scheduled to retire by the end of 2029.

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Table of Contents

The following table presents in-service electric and natural gas utility-related properties for Ameren Missouri and Ameren Illinois as of December 31, 2024:

AmerenMissouriAmerenIllinoisCircuit miles of electric transmission lines(a)3,114 4,786 Circuit miles of electric distribution lines34,319 46,299 Percentage of circuit miles of electric distribution lines underground25 %16 %Miles of natural gas transmission and distribution mains3,558 18,750 Underground natural gas storage fields— 12 Total working capacity of underground natural gas storage fields in billion cubic feet— 24 

(a)ATXI owns 561 circuit miles of electric transmission lines not reflected in this table.

Our other properties include office buildings, warehouses, garages, and repair shops.

With only a few exceptions, we have fee title to all principal energy centers and other units of property material to the operation of our businesses, and to the real property on which such facilities are located (subject to mortgage liens securing our outstanding first mortgage bonds and to certain permitted liens and judgment liens). The exceptions as of December 31, 2024 are as follows:

•Certain property is situated on lands occupied under leases, easements, franchises, licenses, or permits. That property includes a portion of Ameren Missouri’s Osage Energy Center reservoir; certain facilities at Ameren Missouri’s Sioux Energy Center; most of Ameren Missouri’s High Prairie and Atchison energy centers; Ameren Missouri’s Boomtown, Cass County, Huck Finn, and Maryland Heights energy centers; certain substations; and most transmission and distribution lines and natural gas mains. The United States or the state of Missouri may own or may have paramount rights with respect to certain lands lying in the bed of the Osage River or located between the inner and outer harbor lines of the Mississippi River on which certain of Ameren Missouri’s energy centers and other properties are located.

•The United States, the state of Illinois, the state of Iowa, or the city of Keokuk, Iowa, may own or may have paramount rights with respect to certain lands lying in the bed of the Mississippi River on which a portion of Ameren Missouri’s Keokuk Energy Center is located.

Substantially all of the properties and plant of Ameren Missouri and Ameren Illinois are subject to the liens