Ghirardelli Associates provided a Construction Engineer who was responsible for inspection and office engineering on this $90 million dollar project. Constructed in 1962, the Benicia-Martinez Bridge carries Route 680 traffic over the Carquinez Strait between the cities of Benicia in Solano County and Martinez in Contra Costa County. Currently, over 90,000 vehicles cross the bridge each day. The retrofit program included replacing the existing steel bearings with isolation bearings, adding a new tapered exterior concrete jacket to most of the piers and adding additional caissons with tie down anchors. Other work was done to strengthen the approach columns and widen the column footings, place larger expansion joints at the abutments and strengthen the steel members which comprise the truss structure.

Services Provided: Inspection and Office Engineering