Information for Strong-Motion Station
Vallejo - Carquinez/I80 East Bridge
CGS - CSMIP Station 68184
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 38.0610 N
Longitude 122.2252 W
Elevation (m) --
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Spans5
Plan ShapeStraight.
Total Length3350' (1021.1m). Bridge spans range from 150' (45.7m) to 1100' (335.3m).
Width of Deck52' (15.8m)
Construction Date1958
Instrumentation2002. 53 accelerometers and 2 relative displacement sensors on the bridge. 3 accelerometers at a free-field site.
Superstructure TypeMain span is a steel truss structure typically consisting of built-up steel welded box members with perforated plates on two sides. Connections are high-strength bolted. Abutment 1 is a seat abutment.
Substructure TypeSteel truss towers.
Foundation TypeAbutment 1 is supported on a spread footing. Piers 2 and 3 are supported on concrete caissons. Pier 4 is supported on steel H-piles. Pier 5 is supported on a hollow concrete shaft.
RemarksThis bridge was extensively instrumented under the interagency agreement between Caltrans and DOC during the retrofit work in 2001.