PSC chair Summer Strand said ATC filed or refiled 564 application documents after receiving a completeness determination late last year. In PSC filings, ATC had said the project is needed to provide electric service to a new data center under construction. The PSC previously gave the utility’s application a “completeness” determination in December 2025. “It’s no longer clear to the public or public officials what their actual plans are,” he wrote. PSC deals major blow to transmission project supporting Port Washington data center was originally published by Wisconsin Public Radio.