Overview
- The Public Service Commission voted unanimously Thursday to revoke its December completeness determination for American Transmission Company’s Ozaukee County project and closed the current docket.
- Commissioners said ATC filed more than 500 amended documents and a revised application that changed routes, costs and studies, which made the case too fluid for staff and the public to evaluate.
- The project had an estimated cost range of $1.3 billion to $1.7 billion and would have added high‑voltage lines, rebuilt circuits and built new substations across six counties to serve the Vantage data center campus.
- More than 2,500 public comments pressed regulators to restart the process over concerns about routing through private properties, tree removal and uncertain cost estimates, and local officials have proposed routing that uses existing easements.
- ATC said it was disappointed and is considering its options; the restart removes the existing regulatory deadline and leaves construction and in‑service timelines for the power lines and the Port Washington data center unclear.