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Mt. Vernon Area Reliability Project

Improving energy reliability in your community

Ameren Illinois Company (AIC) and Ameren Transmission Company of Illinois (ATXI) are proposing the Mt. Vernon Area Reliability Project to improve energy reliability for local customers in Jefferson and Wayne counties and the surrounding region.

Project Overview

The Mt. Vernon Area Reliability Project is the first proposed project in a larger portfolio of energy projects called the South Central Illinois Transmission Expansion (SCITE) Program. The SCITE Program is being jointly developed by Ameren Transmission and regional member cooperatives and will provide significant reliability benefits for regional energy grids and customers across the southern portion of Illinois.

The Project includes two phases. Phase 1 includes construction of an approximately 6-mile 138 kV transmission line from AIC’s existing Mt. Vernon 42nd Street substation to the proposed Reifen substation located east of Mt. Vernon in Jefferson County. Our goal is to have these facilities in service in December 2025.

Phase 2 includes the construction of a 138 kV transmission line* approximately 35 miles from the proposed Reifen substation to another proposed substation, named Kays, located near Fairfield in Wayne County. Our goal is to have these facilities in service in December 2026.

*Phase 2 will be designed with the potential to add a future additional 345 kV circuit.

Download the Fact Sheet (PDF)

Ameren Selects Preferred Routes, Files Application with Illinois Commerce Commission

On September 22, 2023, Ameren submitted an application to the Illinois Commerce Commission (ICC) for a Certificate of Public Convenience and Necessity (CPCN) for the Mt. Vernon Area Reliability Project. Ameren anticipates the ICC’s decision in 2024.

Landowners of record along the filed Preferred Route will receive mailed notification letters from Ameren and the ICC. If Ameren’s application is approved, easement negotiations will begin with landowners in 2024. Our goal is to have Phase 1 facilities in service by December 2025 and Phase 2 facilities in service by December 2026.

For more information on the ICC filing, visit icc.illinois.gov/docket and enter P2023-0658 in the docket search box.


Tentative Project Schedule

The project schedule below will be updated as major milestones are met. All items listed are pending regulatory approvals. Schedule is subject to change.

  • Gather public and agency input through Community Representative Forums and Public Open Houses
  • Route siting studies
  • Final route identified
  • Engineering
  • File route(s) with Illinois Commerce Commission (ICC)
  • Certificate of Public Convenience & Necessity (CPCN) Decision
  • Environmental surveys and permitting
  • Easement acquisition process
  • Preconstruction activities
  • Construction
  • Restoration
  • Project in service: December 2025 (Phase 1: Mt. Vernon to Reifen) and December 2026 (Phase 2: Reifen to Kays)

Project Benefits

The Mt. Vernon Area Reliability Project will benefit the local area by:

  • Providing reliable energy for Jefferson and Wayne counties and the surrounding region
  • Improving resiliency to minimize power limitations and impacts to local communities
  • Increasing energy capacity to support homes, businesses and agricultural customers
  • Supporting continued area economic growth



Public and Stakeholder Involvement

Our Project team gathered and reviewed data and collected input from community members, landowners, and stakeholders in the Study Area during different stages of the Project. Our first round of engagement, in April 2023, was held to introduce the project and gather feedback on the Route Segments. All input received was reviewed and considered during development of the Preliminary Route Alternatives. Our second round of public engagement, in June 2023, was offered to gather input on the Preliminary Route Alternatives. All comments collected were reviewed and considered by the Project team during the selection of the Preferred Route for the project, which was filed with the ICC. We appreciate everyone’s participation during the routing study and public involvement process.

Contact Us

We have a designated project hotline and email address that the public can use to keep in touch with members of our project team. Have a question? Please contact us using one of the methods below.




2610 Broadway Street
Mt. Vernon, IL 62864

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