The primary provider of transmission services in Michigan is ITC Holdings Corp., a Novi-based company. ITC Holdings is made up of two wholly owned subsidiaries — Michigan Electric Transmission Company and International Transmission Company. Together they are often called ITC Michigan.
METC and ITC Transmission together serve the majority of Michigan’s lower peninsula population of almost 10 million people with approximately 8,700 miles of high-voltage transmission lines. While ITC has constructed additional transmission resources, the backbone of their system is made up of infrastructure that was originally owned by Consumers Energy and DTE. ITC describes their customers as: electric co-ops, municipal utilities, regulated utilities, independent power producers and nonutility generators, and interconnections for merchant generators.
The primary provider of transmission services in Michigan’s Upper Peninsula is American Transmission Company. The company’s published information does not include specific information on their Michigan operations. But they note they provide transmission services to more than five million residents in 72 counties across four states.
Both ITC and ATC are compensated for their transmission services by charging their utility customers to access their lines. The rates they charge are regulated by FERC. The MPSC also lists six other organizations that operate transmission infrastructure within or adjacent to Michigan. The following table lists and describes these transmission providers.