U.S. automaker Ford Motor Co. has offered more details on its planned $740 million Detroit campus construction project.

The company plans to use 100 percent unionized construction workers. It agreed to spend $5 million on workforce training, education and development as a way to attract more local workers.

In exchange for $104 million of tax incentives, 50 percent of the contractors hired must be from Wayne County, Michigan, and 30 percent of which must be located in Detroit. The focal point of the new campus, located in Detroit's Corktown neighborhood, will be the renovated Michigan Central Station, a historic rail depot.

The 1.2 million-square-foot campus also will include the former Detroit Public Schools Book Depository, a two-acre piece of vacant property, the site of an old brass factory and a factory that is home to Ford's electric and autonomous vehicle divisions. In addition, the project will include office and retail space and some residential units.