Information for Strong-Motion Station
Benicia - Martinez/I680 East Bridge
CGS - CSMIP Station 68322
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 38.0441 N
Longitude 122.1229 W
Elevation (m) --
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of SpansMain Bridge: 16; Approaches: 6 & 5
Plan ShapeMain Bridge: Straight and curved; Approaches: Curved
Total LengthMain Bridge: 2265.9m; Approaches: 432.5m & 253.9m
Width of DeckMain Bridge: 25.07m; Approached: 17.87m & 12.77m
Construction Date2007
Instrumentation2007. 59 sensors on the main bridge, and 24 & 12 sensors on the approach structures.
Superstructure TypeLightweight prestressed concrete box girder with normal-weight concrete pier table. The box girder is single cell with transverse stiffening ribs at the Main Bridge, single- and double-cell at approaches. The Main Bridge consists of four frames, while the approaches have one and two frames, respectively.
Substructure TypeConcrete piers and bents; 1-2 columns per bent.
Foundation TypeMain Bridge: Piers 6-17 are supported by 8 or 9 piles. Each pile is installed by using 2.5m diameter steel casing driving into the bedrock and a 2.2m diameter CIDH piles socketed into rock
RemarksThis bridge was instrumented during construction under the interagency agreement between Caltrans and DOC.