|About Us | Gallery Search | About this Site | About Heavy Construction|
|Home > History >|
The Existing Bay Bridge at a Glance
Last rivet driven Oct. 23, 1936
Opened Nov. 12, 1936, two months ahead of schedule, six months ahead of the Golden Gate Bridge.
Cost: $78 million (Including Transbay Transit Terminal).
Fare: 65 cents. Reduced to 50 cents three months later to compete with the ferry system.
Length: 23,000 feet (4.5 miles)
Length of total project (structural and roadway including approaches, toll plaza, etc.): 8.4 miles
Structure: Suspension, tunnel, cantilever and truss
Lanes: Six for autos on the upper deck, three for trucks and two for light rail on the lower. (Converted to present configuration in 1958.)
Number of construction employees: 6,500
Man-hours to build: 54.8 million
Lives lost: 24
Steel: 200,000 tons
Concrete: 1 million cubic yards
Barrels of cement: 1.3 million
Timber: 30 million board feet
Paint: 200,000 gallons
Rivets: 22 million
Number of cables: 2
Cable diameters: 28 and 3/4 inches
Number of wires in each cable: 17,464
Diameter of each wire: 0,195 in.
Total length of cable wire: 70,815 miles
Total length of 21/4 inch suspender wires: 45 miles.
West Bay Suspension Bridge:
Length 9260 feet (2822.4 meters)
Vertical clearance 220 feet
Span length 2,310 feet
Tower height 526 feet (from water level)
East Bay Cantilever Bridge:
Length 10,176 feet
Vertical clearance 191 feet
Span length 1,400 feet
Deepest Bridge Pier: 242 feet below water level - 396 feet high
Tunnel: Largest bore tunnel in the world: 76' wide, 58' high (546 meters (1700') long)
Avg. Daily Traffic: 270,000 vehicles
Sources: Caltrans; High Steel: Building the Bridges Across San Francisco Bay