As part of Tranche 1, approximately 100 new miles of 345kV electric transmission lines are to be constructed in Michigan, with an estimated investment of $850 million. These lines will run from ITC’s Nelson Rd substation (Gratiot County) to Oneida substation (Eaton County); and Helix substation (new substation, potentially targeted to locate in northern Calhoun County) to Hiple substation in Indiana. Highlights of these project include:
- First greenfield development of 345kV in Michigan since the Thumb Loop project was approved in 2010
- First project being constructed under the Right of First Refusal (ROFR), Public Act 125 of 2021
- First new 345kV tie lines built into Michigan since 1973
- MISO’s second backbone transmission portfolio (MVPs approved 2011)
- Strategically engineered to support our clean energy transition
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