Michigan Thumb Loop Project

The Michigan Thump Loop Project includes a 140-mile line, 345-kV double-circuit transmission line and four new substations. The line originates from Tuscola County, Mich., and ends in Huron County, Mich. The transmission project will be capable of supporting a maximum capacity of about 5,000 MW.  ITC energized the first phase, comprising 62 miles on Sept. 27, 2013. The remainder was energized mid-May 2015. ITC Holdings Corp. subsidiary International Transmission Co d/b/a ITCTransmission will own and operate the project. The company received a siting certificate for its Thumb Loop project from the Michigan Public Service Commission in February 2011.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
ITC Transmission 140 345 MI MI 2015
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
510 Operating MVP Tuscola County Huron County
Interstate Build Start NERC ISO/RTO Country Project Partners
2012 RFC MISO US