Sources: Gilbert, GM working on mixed-use development of 20 acres along Detroit River

Kirk Pinho - General Motors Co. and Dan Gilbert's Rock Ventures LLC are working to develop a swath of land, at least some of which GM owns, on the Detroit River totaling more than 20 acres just east of the Renaissance Center. According to sources, the development of the area south of Jefferson Avenue would be mixed use, with a combination of multifamily units, retail and other uses. Sources' accounts of the project status differ, with one source saying an architecture firm has been chosen and Gilbert's