The total investment for all of the MTEP11 projects is expected to be $6.5bn over 10 years, including $5.1bn with respect to 16 multi-value projects (MVPs).
Three of those approved MVPs are the ATX projects.
The ATX projects, approved by MISO’s board are a part of the Grand Rivers projects, consist of the Illinois Rivers and Spoon River transmission line projects in Illinois and Mark Twain transmission line project in Missouri.
As part of the expansion, ATX aims to invest about $1.3bn over a 10-year period.
The ATX projects approved today by the MISO board consist of:
The $860m Illinois Rivers project, will cover 331 miles with a new 345kV transmission line, crossing the Mississippi River near Quincy continuing east across Illinois to the Indiana border.
Key benefits include improved power transfer capability in the region and delivery and integration of renewable generation.
The $180m Spoon River project in Illinois, will span 70 miles of new 345kV transmission line from Oak Grove to Galesburg, continuing near Peoria, Illinois.
Key benefits include improved reliability in the northwestern Illinois area and integration of renewable generation.
The $230m Mark Twain project in Missouri, will span 89 miles in Missouri of new 345kV transmission line from the Iowa border to Adair on to Palmyra, Missouri.
Key benefits include enhanced ability to import power from the upper Midwest and delivery and integration of renewable generation.
ATX is a wholly owned subsidiary of Ameren Corporation whereas MISO is a regional organization serving a 12-state region, including the service territories of the Ameren utilities.
