Massachusetts Department of Transportation (MassDOT)


Boston and Cambridge, MA


Highways & Bridges


Design: Architecture, Civil, Electrical, Structural, Historic Preservation, Signals/Communication

Longfellow Bridge Rehabilitation Design-Build

Considered one of the most historically significant bridges in Massachusetts, the Longfellow Bridge connecting Boston and Cambridge, has been restored to its original architectural grandeur while adapting to meet 21st century transportation demands. Known for its distinctive granite piers and towers that give the structure its local moniker as the “Salt and Pepper Bridge,” the Longfellow carries both Route 3 and the Massachusetts Bay Transportation Authority’s Red Line over the Charles River. After more than a century of service, the bridge was showing its age with widespread deterioration of its ornate masonry and metal casting features and in need of repairs to address structural deficiencies.

STV is serving as the lead designer as part of a design-build team for the $255 million rehabilitation that has revamped the bridge making it fully AASHTO compliant with three vehicle lanes, two bike lanes and wider ADA-compliant sidewalks. The Red Line’s center tracks were also improved with new traction power, communications and signals modifications. The firm also provided construction support services to maintain the historic integrity of the span with careful consideration for the reconstruction of the four 60-foot masonry towers that flank the bridge’s center span.