Ameren wins Illinois approval for 21-mile Illinois Valley transmission line project

AEE•2026-09-17

Construction timeline and expected impact

Construction is slated to start in 2027; project completion is targeted by end-2029.

Added transmission capacity is expected to support higher demand, improving long-term growth prospects for the Illinois Valley service area.

Illinois approves Illinois Valley Reliability Project

Ameren secured state regulator clearance for the Illinois Valley Reliability Project in LaSalle and Bureau Counties, targeting stronger grid reliability.

Build-out centers on a new 21-mile, 138-kV transmission line linking the Princeton substation to a new switching station near Peru.

Sources

Ameren wins Illinois approval for 21-mile Illinois Valley transmission line project

Publicnow

Ameren wins Illinois approval for 21-mile Illinois Valley transmission line project

Construction timeline and expected impact

Illinois approves Illinois Valley Reliability Project

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Ameren wins Illinois approval for 21-mile Illinois Valley transmission line project

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