PHOENIX (AP) — Nearly three decades after the closure of a federal boarding school for Native American children, a long-vacant part of its former site in midtown Phoenix is slated for a major development.

A developer's plans for the parcel have cleared the City Council, setting the stage for construction of six high-rise towers for 2 million square feet (0.2 million square meters) of offices, hundreds of condominiums and other housing units, retail space, hotel and movie theater.

Phoenix officials say the nearly $1 billion project on about 18 acres along a light rail line on the northeast corn...