www.ameren.com

Montgomery-Callaway Connector 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.

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. An in-depth routing study was completed in 2025. Ameren Missouri has also gathered input from landowners, community members, interested agencies and local officials. The project schedule is now being reevaluated. 
 

Project Benefits

  • Increasing transmission capacity to meet changing energy needs.
  • Improving energy reliability for the surrounding region and local communities.
  • Promoting access to diverse energy sources.
  • Growing economic development opportunities.
 

Project Timeline

  • 2025: Data Collection and Design - Gather public, stakeholder and agency input; Final route(s) identified; File final route(s) with Missouri Public Service Commission (PSC)
  • 2026: Missouri PSC decision and issuance of Certificate of Convenience and Necessity (CCN) decision, Engineering and permitting, Environmental Surveys and permitting, Real Estate Easement acquisition
  • 2027: Construction begins
  • 2030: Project in service

*All items shown are pending regulatory approvals. Schedule is subject to change.
 


Next Steps

Landowners along the preferred corridor will receive letters from Ameren Missouri about the selection of a preferred corridor along with a map. Our Project team will work with landowners to develop a route within this preferred corridor and along Ameren Missouri's existing right of way. Once a route has been developed, Ameren Missouri will file an application and submit this route to the Mo PSC in Fall 2025.

Virtual Engagement

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

Share Feedback

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

 

Project Maps

Contact Us

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

Call Us
Email Us
314.200.4463
connect@montgomery-callawayconnectorproject.com

 

Frequently Asked Questions

General Questions

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.
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

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.
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.
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.
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

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.
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.
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.
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