CESMD

Information for Strong-Motion Station

Benicia - Martinez/I680 West Bridge

CGS - CSMIP Station 68682

Earthquakes recorded by this station

Ambient Records for CE68682

 

(Station Photograph - click to enlarge)	(Sensor Layout - click to see PDF File)

   

Latitude	38.0414 N
Longitude	122.1238 W
Elevation (m)	--
Site Geology
Vs30 (m/sec)
Site Class

 

No. of Spans	10 bridge spans, 8 approach spans.
Plan Shape	Straight with one curved approach.
Total Length	6215' (1894.3m). Bridge spans range from 330' (100.6m) to 528' (160.9m). Length of approach spans ranges from 90' (27.4m) to 197' (60.0m).
Width of Deck	77.5' (23.6m)
Construction Date	1962
Instrumentation	2001. 71 accelerometers and 1 displacement sensor on the bridge. 3 accelerometers at a free-field site.

 

Superstructure Type	Main span: steel truss. Approach spans: steel plate girders. Cantilever abutments at the approach spans.
Substructure Type	RC hollow shaft piers supported by box footings. One column per pier.
Foundation Type	Box footings on steel caissons.
Remarks	This toll bridge was instrumented with 9 sensors in 1994 under the interagency agreement between Caltrans and DOC. The bridge was extensively instrumented with 81 sensors during the retrofit work in 2001.