CESMD
Information for Strong-Motion Station
San Francisco - Bay Bridge/West
CGS - CSMIP Station 58632
Earthquakes recorded by this station
 
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
   
Latitude 37.7982 N
Longitude 122.3774 W
Elevation (m) --
Site Geology  
Vs30 (m/sec)  
Site Class  
 
No. of Spans7
Plan ShapeStraight.
Total Length10292' (3137.0m). Bridge spans range from 861' (262.4m) to 2310' (704.1m).
Width of Deck60' (18.3m) to 72' (21.9m)
Construction Date1936
Instrumentation1993 (pre-retrofit): 6 accelerometers on the bridge. Post-retrofit: 76 accelerometers and 3 relative displacement sensors on the bridge. 3 accelerometers at a free-field site. 6 accelerometers at downhole locations.
 
Superstructure TypeSteel truss deck supported by steel suspension cables.
Substructure TypeSteel plated columns with vertical bracing. 2 columns at each tower.
Foundation TypeConcrete piers founded on bedrock.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC. The bridge is composed of two 3-span cable suspended structures with a common cable anchorage at the center.