Ameren Transmission Co. of Illinois (ATXI) on May 29 filed a conditional application with the Missouri Public Service Commission for a certificate of convenience and necessity (CCN) authorizing it to construct, install, operate, control, manage and maintain three new transmission line segments as part of the Mark Twain project.
It wants to build: a new 345-kV transmission line running generally from Palmyra, Missouri, and extending westward to a new substation located near Kirksville, Missouri, a new 345-kV line extending from the new substation north to the Iowa border; and a 2.2-mile 161-kV connector line from the new substation to an interconnection with the existing Adair substation owned by Union Electric d/b/a Ameren Missouri. Alternatively, it asked the PSC for an order declining jurisdiction in this matter on the grounds that the commission does not have jurisdiction over ATXI because ATXI is not a “public utility” under Missouri law.
The new transmission line consisting of the 345-kV and 161-kV line segments, and which includes the Zachary Substation (collectively called the “Mark Twain Project”), is a Midcontinent Independent System Operator (MISO)-approved multi-value project (MVP). As defined by MISO, the portfolio MVPs are transmission “[p]rojects providing regional public policy, reliability and/or economic benefits” through increased market competition and delivery of lower cost generation.
The company told the PSC: “There is a need for the transmission capacity to be provided by the Mark Twain Project, and the Project is in the public interest in that it will provide for the integration of wind energy in Missouri to increase the amount of electricity available from renewable resources, including wind energy that would be transported to aid Missouri public utilities in complying with Missouri’s Renewable Energy Standard, section 393.1020, RSMo., et seq. The Project is also part of improvements to the regional transmission system under MISO’s functional control and will improve the overall reliability of the regional transmission system and reduce transmission system congestion. The Project will provide the additional benefit of providing a remedy to several reliability issues which can result in unacceptable low voltage conditions in the Kirksville area.”