The data company Cologix has started work on a $1 billion AI data center complex in the Lewis Center area, part of a larger central Ohio expansion.

In a rare rebuke, more than a dozen former workers of the powerful data-mining and surveillance company say the firm's work with the Trump administration violates the company's founding principles.

In addition to the Delaware County project, Cologix expects to start work later this year on a larger site, 154 acres in Johnstown, that could include up to eight data centers, said Tiemeier.