Information for Strong-Motion Station
West Sacramento - I80/Yolo Causeway
CGS - CSMIP Station 67972
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 38.5728 N
Longitude 121.5870 W
Elevation (m) 8
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Spans220
Plan ShapeStraight.
Total Length8800' (2682.4m). Bridge spans are 40' (12.2m).
Width of Deck135.4' (41.3m) min.
Construction Date1963
Instrumentation2000. 9 accelerometers on the bridge. 3 accelerometers at a free-field site.
Superstructure TypePrestressed inverted W sections. Right and left structures were widened with inverted double T median to form single structure. Open end diaphragm abutments.
Substructure TypeOctagonal concrete piles. 15 piles per bent. Large concrete piles were added to both sides of each frame structure during the 1997 retrofit.
Foundation TypePrestressed concrete piles.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC. The bridge was widened in 1969 and 1986, and retrofitted in 1997.