Maryland Gov. Martin O’Malley announced Tuesday that the state has chosen Intercounty Constructors of Annapolis Junction, Md., to design and build the first phase of the Intercounty Connector.

The $478.7 million contract covers the construction of seven miles of the ICC from Interstate 370 to Georgia Avenue. The company is a joint venture of Granite Construction Company, Corman Construction Inc. and G.A. & F.C. Wagman Inc.