Review the FAQs below to learn more about the Mark Twain Transmission Project.
What is the Mark Twain Transmission Project?
The Mark Twain Transmission Project is a new 345,000-volt (345kV) approximately 96-mile transmission line to be built in northeast Missouri. It includes construction of a new substation near Kirksville, Missouri.
Why is the Mark Twain Transmission line needed?
This project is necessary to promote grid reliability; relieve congestion to the energy grid; meet local energy needs; and promote renewable energy, such as wind power.
Why is ATXI proposing a new route for the Mark Twain Transmission Project?
After listening to community members, landowners, county commissioners and other local and state representatives, ATXI evaluated new route options for the project. ATXI is working with Northeast Power and Ameren Missouri to use existing right of way for the majority of the new line. Under this new plan, the proposed route will minimize impact to landowners, communities and existing farmland - and will result in fewer utility structures along the existing right of way.
What is the new route?
The proposed new route will run through Adair, Knox, Lewis, Marion and Schuyler counties and includes construction of the Zachary Substation near Kirksville, Missouri. It will collocate nearly 100 percent of existing right of way on Northeast Power's 161 kV line between Palmyra and Kirksville and Ameren Missouri's 161 kV line from Kirksville to the Iowa border. The new route will minimize impact to landowners, communities and existing farm land, and result in fewer utility structures along the existing right of way. New right of way will be sought in Adair County to connect the Zachary and Adair substations and in Marion County to connect to the Maywood Substation. Additionally, 50 feet of expanded right of way is needed along the Ameren Missouri line in Adair, Marion and Schuyler counties.
What about the rest of the line? Will it be a new build?
New right of way will be sought in Adair County to connect to the Zachary and Adair substations - and in Marion County to connect to the Maywood Substation. ATXI has shared maps with landowners to get their feedback on where the new right of way should be.
How does northeast Missouri benefit from this project?
This project is expected to generate millions of dollars in economic activity and annual tax revenues to support schools, roads, police and emergency and social services in the five Missouri counties where the line will be located (Adair, Knox, Lewis, Marion and Schuyler counties).
What happens to the original route?
ATXI is committed to the proposed new route, and it remains optimistic that the counties will view it favorable. The option to use the original filed route by ATXI in 2015 will remain open until this new route is approved.
What is the benefit to Northeast Power and its Member-Distribution Cooperatives for working with ATXI on the project?
Approximately 55 miles of Northeast Power's line, running between Palmyra and Kirksville, will be completely rebuilt, and the current wooden H-frame transmission structures will be replaced by fewer steel monopoles. Due to the age of Northeast Power's current 161kV line, replacement would likely be necessary within 10 to 15 years, which would cost approximately $30 million.
Working with ATXI allows Northeast Power to save a significant amount of money while making important infrastructure improvements. In addition, future right of way maintenance costs will be split with ATXI, which results in ongoing savings for Northeast Power and its Member-Distribution Cooperatives.
Landowners will benefit from new easement payments as well as less burden on farm and, due to the reduced number of poles and the elimination of guy wires and anchors.
What is the benefit to Ameren Missouri?
ATXI will completely rebuild Ameren Missouri's line between Kirksville and the Iowa border. This project will help avoid costs that would otherwise have been paid for by Ameren Missouri customers.
Landowners will benefit from new easement payments as well as less burden on farmland, due to the reduced number of poles and the elimination of guy wires and anchors.
Will co-location of the line raise Northeast Power rates?
Northeast Power's involvement with the project will not result in a rate increase for member-distribution cooperatives or their member-owners.
Will ATXI need to have the new route approved by the Missouri Public Service Commission (PSC)?
In mid-September ATXI submitted an application to the Missouri Public Service Commission (PSC) for a certificate of convenience and necessity (CCN) for the Mark Twain Transmission Project. The expected timing for a PSC decision is 2018.
What is the cost of the project and when will it begin?
ATXI is still in the process of completing the routing and design. However, it is anticipated the new route may cost slightly more than that of the original design. The in-service date is December 2019.
Where can landowners find out more information?
If you believe your property is located on the proposed final route selection, please feel free to contact ATXI at 877.830.3440 or by email at firstname.lastname@example.org. A member of Contract Land Staff, a group hired by ATXI for real estate matters, can assist landowners with questions and concerns about their property. If you have questions specifically for Northeast Power, please call 573.769.2107.
What do the new structures look like?
Single steel monopoles with no guy wires or anchors will be used for the majority of the route. At locations where the line turns a large angle or where a full tension dead end is required, two steel structures will be used, because the loads would be too large for a single pole. See the diagram below.