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.

The contract is the first of five that will create the 18.8-mile ICC that ultimately will connect the Interstate 270 corridor in Montgomery County to the Interstate 95/U.S. Route 1 corridor in Prince George’s County.

This first stretch of the ICC is scheduled to be completein late 2010, while the ICC segments east of Georgia Avenue are slated to open in late 2011 or 2012.