Mark Twain Transmission Project

A new route is being proposed for the Mark Twain Transmission Project (Project), a 345,000-volt transmission line and substation to be built in northeast Missouri. After listening to community members, landowners, county commissioners and other local and state representatives, Ameren Transmission Company of IIllinois (ATXI) is collaborating with Northeast Missouri Electric Power Cooperative (Northeast Power) and Ameren Missouri to use existing right of way for the majority of the new approximately 100-mile line.

The proposed new route will run through Adair, Knox, Lewis, Marion and Schuyler counties and will include construction of the Zachary Substation near Kirksville, Missouri. To minimize the potential impacts of the Project and to address concerns of property owners and local communities, the proposed route will use nearly 90 percent of existing right of way on Northeast Power's 161,000-volt line between Palmyra and Kirksville and Ameren Missouri's 161,000-volt line from Kirksville to the Iowa border. After reviewing the proposed new route, the Adair County Commission asked ATXI to consider reconfiguring a portion of the route that runs through Adair County. As a result, we are seeking input on five route options in the area south of Kirksville. The route options include relocation of the new substation adjacent to the existing Adair substation. We are seeking feedback from landowners in all five counties along the proposed route.

Project benefits include:

Improved electric system reliability

Improved access to renewable sources of energy

Regional and local growth in northeast Missouri

New annual tax revenue to the five counties in northeast Missouri for schools, police, roads and social services

Improved transmission capacity

Contact Us
Hotline: 888.340.6640
Mail: Mark Twain Transmission Project
         c/o Burns & McDonnell
         Jen Berry
         9400 Ward Parkway
         Kansas City, MO 64114

Quick Facts
New transmission line from Palmyra to Kirksville and then north to the Iowa border
Length: Approximately 100 miles
In-service date: 2019
Voltage: 345,000 volts
Structures: Single-shaft steel poles (double circuit) minimal double dead-end steel poles
Easement width: 150 feet
MISO Multi-Value Project (MVP)


   Ameren Transmission

    Feedback options and open house information is now available for the Mark Twain Transmission Project.

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