Montgomery-Callaway Connector Project

Ameren Transmission

The Project includes approximately 30 miles of double-circuit, 345-kilovolt transmission line in Montgomery and Callaway counties. The proposed transmission line will connect the existing Burns substation in Callaway County to the existing Montgomery substation in Montgomery County.

About the Project

The regional grid operator, Midcontinent Independent System Operator (MISO), identified the need for this project to support new, third-party energy sources. As the incumbent energy provider, federal regulation requires Ameren Missouri to develop grid infrastructure projects that fulfill these needs.

View the Interactive Map

Community Benefits

Increased Capacity

Increasing transmission capacity to meet changing energy needs

Reliability

Improving energy reliability for the surrounding region and local communities

Energy Sources

Promoting access to diverse energy sources

Development Opportunities

Growing economic development opportunities

Project Maps

View Interactive Map

Proposed Route (PDF)

Study Area – Winter 2024 (PDF)

Preferred Corridor Map (PDF)

Project Schedule

Fall 2024 – Early 2025

Routing, Stakeholder, and Public Engagement

Early 2025 – Fall 2025

Finalize routes

Fall 2025

File final route with Missouri Public Service Commission

Fall 2025 – Spring 2027

Receive a Certificate of Convenience and Necessity (CCN) decision from Missouri Public Service Commission

Spring 2027 – Spring 2028

Easement and permitting procurement

Fall 2027 – Spring 2029

Vegetation clearing & geotechnical exploration

Summer 2029 – 2030

Construction

Late 2030

Project in service

Next Steps

Following a detailed routing study and feedback from residents, agencies and officials gathered at multiple open houses and online, a Proposed Route has been selected and filed with the Missouri Public Service Commission (PSC). Thank you to everyone who participated and provided input during our engagement process.

On Nov. 10, 2025, Ameren Missouri submitted an application to the MO PSC for a Certificate of Convenience and Necessity (CCN) for the Montgomery-Callaway Connector Project. Routes are not final and are subject to final approval by the PSC. The expected timing for the PSC's decision is fall 2026.

If approved by the PSC, easement negotiations will begin with affected landowners shortly after. Vegetation clearing and pre-construction activities are planned to begin in 2027. The goal is to have this new project in service and providing benefits to the local community by the end of 2030. Our project team will maintain ongoing communications with landowners, local government, agencies and other stakeholders during the project.

Virtual Engagement

View our self-paced, virtual engagement and interactive comment map to learn about the project and provide feedback.

Provide Feedback

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Complete a questionnaire for our routing team to help us understand the project area and inform the route selection process.

Complete Questionnaire

General Questions

What is the Montgomery-Callaway Connector Project?

This Project, known as the Montgomery-Callaway Connector Project, will construct an approximately 30-mile, double-circuit 345-kilovolt (kV) transmission line in Montgomery and Callaway counties.

What is the need for the Montgomery-Callaway Connector Project?

A recent study by the Midcontinent Independent System Operator (MISO) revealed the need for significant system upgrades in the region to handle an increase of approximately 1,500 megawatts of new, third-party generation. Federal regulation requires Ameren to meet these needs and provide access to our transmission system. These upgrades will also enhance local grid reliability and improve energy flexibility. Our primary goal throughout the project will be to work with the local community and minimize landowner and agricultural impact. We care about your property rights and want to be good neighbors in the communities we’ve served for more than 100 years.

Public & Stakeholder Involvement

What is the purpose of holding meetings?

The public process is meant to engage landowners with our team so that we can learn as much as we can about Montgomery and Callaway Counties. During this process, stakeholders can learn about the need and benefits of the Project, discuss questions or issues with our Project team and provide input on sensitivities and opportunities to help our team improve the routing and siting process. We look forward to the public's input and our public process is aligned with the Project’s milestones.

How will you determine where the routes will be?

Developing a transmission route is a phased process that involves the collection of information to understand and identify opportunities and sensitivities within Montgomery and Callaway Counties. At our public open houses, we'll gather data from the project area and begin to narrow down route corridors through opportunities and sensitivities that meet technical guidelines. During this collaborative process of working with agencies, community members and landowners, Ameren Missouri will develop constructible routes that minimize impacts and then identify at least two routes that will be filed with the Missouri Public Service Commission.

How is Ameren working with the communities within the Project Area?

We started by identifying all affected communities as well as all other units of government such as school districts and soil and water conservation districts. We also identified other organizations that may have an interest in this in the Program Area, including the U.S. Fish and Wildlife Service, Missouri Department of Conservation, State Historic Preservation Office and others. Our team is also available to meet individually with community officials or organizations, as requested.

How can I provide comments?

We appreciate your participation. We not only want your comments, but we also encourage them. You can submit questions, leave a comment, provide input, or express concerns on the website. We also have a dedicated Project hotline: 314.200.4463. If you leave a message, a Project representative will return your call. You can also send us an email at connect@montgomery-callawayconnectorproject.com.

Environmental & Agency Coordination

Is Ameren coordinating environmental planning with any agencies or organizations?

Ameren Missouri will coordinate with various environmental related agencies, including the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, Missouri Department of Conservation, State Historic Preservation Office and others. We also invite these agencies to attend our meetings. Ameren Missouri is committed to environmental management and sustainability. Learn more at Ameren.com/Biodiversity.

Will the Project impact birds?

Ameren Missouri 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.

Will the Project impact threatened or endangered species?

As a part of Ameren Missouri’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 routes that will avoid or minimize impacts to threatened and endangered species.

Phone: 314.200.4463

Email: connect@montgomery-callawayconnectorproject.com

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