MESA Bridge ProjectPeriod 1Christine Guzman & Alejandra Alvarado

Antioch Bridge Location: State Route 160 between

Contra Costa and Sacramento counties. Type: Truss Materials: steel plate girder Year: January 1926 & December 1978 Cost: 2 million & 34 million

Benicia-Martinez Bridge Northbound Location: Interstate 680 between Solano

and Contra Costa counties Type: Segmental Materials: Concrete Year: 2007 Cost: 1.3 billion

Benicia-Martinez Bridge Southbound Location: Interstate 680 between Solano

and Contra Costa counties Type: Truss bridge Materials: Year: 1962 Cost: $25 million

Carquinez: Eastbound Location: Interstate 80 between Contra

Costa and Solano counties near Vallejo Type: truss Materials: steel Year: November 1958 Cost: 38 million

Carquinez: Westbound Location: Interstate 80 between Contra

Costa and Solano counties near Vallejo Type: Main cable catenary suspension Materials: Wire cable ,Cable bands Year: November 2003 Cost: 240 million

Dumbarton Bridge Location: State Route 84 between San

Mateo and Alameda counties Type: Materials: Steel , Concrete Year: September 1962 (widened in 1991,

parallel structure in 2007) COST: 1927 structure: $2.25 million

1982 structure: $70 million

Richmond-San Rafael Bridge Location: Interstate 580 between Contra

Costa and Marin counties Type: Cantilever and truss Materials: Concrete, wood Year: September 1, 1956 Cost:$66 million

San Francisco-Oakland Bridge Location: Interstate 80 Between

Oakland and Yerba Buena Island Type: Skyway structure/ Self anchored

suspension Materials: Year: September 2013 Cost: $6.4 billion

San Francisco-Oakland Bridge Location : Interstate 80, Yerba Buena

Island to San Francisco Type: Suspension Materials: Wet sand pipes Year: November 1936 Cost: $77 million

San Mateo-Hayward Bridge LOCATION: State Route 92 between San

Mateo and Alameda counties Type: Steel box girder Materials: Steel, concrete Year: October 1967, widened 2003 Cost: Original structure: $70 million

Widened structure: $200 million