Missouri approves Mark Twain Transmission Project


Ameren Transmission Company of Illinois (ATXI) has received approval from the Missouri Public Service Commission (PSC) to build the Mark Twain Transmission Project in northeast Missouri.

Mark Twain Transmission Project involves construction of a 100-mile, 345,000-volt transmission line and substation.

The project will run from Palmyra to Kirksville through Adair, Knox, Lewis, Marion and Schuyler counties in Missouri and north to the Iowa border, completing a link in the energy infrastructure of the region.

It will include construction of Zachary Substation adjacent to the existing Adair Substation in Adair County.

Most of the transmission line will be co-located on existing rights of way. Specifically, the route will co-locate on existing right of way on the 161,000-volt line of Northeast Missouri Electric Power Cooperative between Palmyra and Kirksville and the 161,000-volt line of Ameren Missouri from Kirksville to the Iowa border.

ATXI, a wholly owned subsidiary of Ameren , expects to invest $250m in the Mark Twain Transmission Project.

Construction is planned to begin in April 2018 and is expected to be operational in December 2019.

ATXI chairman and president Shawn Schukar said: “Approval of the Mark Twain Transmission Project is a significant step toward strengthening our region’s energy grid and delivering customer benefits.

“This project will deliver greater energy reliability, economic growth and improved access to clean energy sources for Missouri and its residents.

“We look forward to continuing our work with Northeast Power, landowners, community members, county commissioners and various local and state agencies as this necessary project moves forward.”

Ameren, based in St Louis, supplies power to 2.4 million customers and 900,000 natural gas customers through Ameren Missouri and Ameren Illinois rate-regulated utility subsidiaries.

Ameren Illinois provides electric distribution and transmission service, as well as natural gas distribution service, while Ameren Missouri provides vertically integrated electric service, with generating capacity of over 10,200MW, and natural gas distribution service.

ATXI develops regional electric transmission projects.

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