Mark Twain Transmission Project

On April 27, 2016, the Missouri Public Service Commission, by a vote of 5-0, approved Ameren Transmission Company of Illinois' (ATXI) application seeking a certificate of convenience and necessity (CCN) to construct the Mark Twain Transmission Project in Northeast Missouri. As part of the decision, the Commission found the project is in the Missouri public interest because it is needed to:
Promote grid reliability
Relieve congestion
Promote renewable energy
Meet local load serving needs
Provide downward pressue on customer rates

The Mark Twain Transmission Project consists of a 345,000 volt transmission line that runs 100 miles from Palmyra to Kirksville and then north to the Iowa border. The project also includes building a 161,000 volt line segment to interconnect the existing Adair Substation to the new Zachary Substation. This connector transmission will be approximately 2 miles in length.

The Mark Twain Transmission Project is part of a Multi-Value Project (MVP) that was approved in 2011 by the Midcontinent Independent System Operator (MISO), a regional transmission organization providing regional grid management.

For additional information, please see the Missouri Public Service website and reference case number EA-2015-0146.

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

Energy Flow Graphic

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Learn about the Mark Twain Transmission Project 

Quick Facts
New transmission line from Palmyra to Kirksville and then north to the Iowa border
Length: Approximately 100 miles
In-service date: 2018
Voltage: 345,000 volts
Structures: Single-shaft steel poles
Easement width: 150 feet
MISO Multi-Value Project (MVP)

   Ameren Transmission
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