Ameren Transmission Company of Illinois (ATXI) and Ameren Illinois are working together to build a more reliable and resilient energy grid for the future. The Central Illinois Grid Transformation Program includes approximately 380 miles of new or upgraded transmission lines across central Illinois, with the vast majority to be rebuilt along existing corridors and co-located with existing Ameren Illinois facilities. The program also includes building three new substations and upgrades to several existing substations.

Just as additional roads need to be built or expanded over time, the program will prepare the grid for the future by replacing aging infrastructure, adding transmission capacity to ensure energy reliability and resiliency, and promoting more access to energy sources for communities. Whether energy reaches your home by Ameren Illinois or another company, energy arrives in our community via these transmission lines. Upgrading and investing in the system will produce benefits for everyone.

The program will be in service in June 2029 with restoration complete in 2030.

Adams, Brown, Champaign, Ford, Fulton, Hancock, Iroquois, McDonough, McLean, Morgan, Peoria, Pike, and Tazewell counties.

Ameren Illinois will coordinate with various environmental related agencies including, but not necessarily limited to, the, U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, Illinois Department of Natural Resources, State Historic Preservation Office. They have also all been invited to attend our meetings. Ameren has a strong commitment to incorporating environmental management and sustainability principles into our work.

Ameren uses an avian-safe structure design and flight diverters where necessary as part of our corporate Avian Protection Plan to minimize impacts to migratory birds.

As a part of Ameren’s evaluation of potential routes, the minimization of environmental impacts, including those to threatened and endangered species, is a priority. As a part of this routing evaluation, Ameren will prioritize those route that will avoid or minimize impacts to threatened and endangered species. Ameren will work with state and federal agencies to identify potential impacts and compensate/mitigate for such occurrences as required for any unavoidable impacts. In most cases through implantation of various conservation measures Ameren is able to avoid or substantially minimize impacts to most species. Many threatened and endangered species inhabit our ROWs after construction, especially where native vegetation and habitats are established as part of the restoration and ongoing maintenance efforts throughout the life of the project. Ameren will work with landowners during the restoration process to identify opportunities for creating quality habitats that may be beneficial to protected species, as well as other more common species.

The team has gathered and reviewed data from community members, landowners, and stakeholders during different stages of the routing process to understand and identify opportunities and sensitivities within the Program areas. All input received during our two phases of engagement was reviewed and considered, along with our routing criteria during the development of the Proposed Route. The route represents the best combination of technical guidelines while utilizing Opportunities and minimizing impacts to Sensitivities within the surrounding areas.

After studying the Program areas and existing corridors, Ameren determined there are existing Ameren transmission lines in the area that provide opportunities to locate the new 345 kV transmission line along a vast majority of Ameren’s existing corridors. Our preliminary routing review and routing study identified areas of the program where physical constraints and sensitivities limit the construction, operation and maintenance of the new transmission line within Ameren’s existing corridors. We utilized community input from our public engagement and technical routing criteria to develop routing in greenfield areas and select a Proposed Route.

The process of acquiring real estate is currently underway with landowners that own property affected by the final Approved Route. Affected landowners can find additional information about the real estate process by clicking here.

If you own property along or near the Approved Route, our Program team previously made contact in February 2024. The team will be working with affected landowners along the selected route to discuss the next steps in the right-of-way process. Should you have any questions about your property in regard to the final Approved Route, please contact our real estate team.

Affected landowners can find additional information about the real estate process, including contact information for the real estate team in their area, by clicking here.

Pre-construction activities are anticipated to start in 2024 for the Program. To properly design and build the structures, Ameren surveys the properties affected by the program to determine legal boundaries, soil conditions, proper foundation depth, cultural resources and environmental sensitivities. Some parcels may also require permanent or temporary access to the right-of-way for construction and maintenance at various points along the line.

Prior to construction, Ameren will conduct surveys to collect information necessary for construction to start. The field data we collect will help our engineers determine the final design and structure locations and will help to minimize impacts to cultural and biological resources during construction. Examples of types of surveys conducted include:

• Wildlife Surveys
• Archaeological Surveys
• Wetland and Stream Surveys
• Soil Surveys
• Property Surveys
• Vegetation Clearing

Pre-construction activities, including field surveys, are taking place throughout the Program area. Construction is anticipated to begin in 2026, with different start dates in each community. Construction at new or existing substations may begin earlier.