Information for Strong-Motion Station
Eureka - Samoa Channel Bridge
CGS - CSMIP Station 89686
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 40.8216 N
Longitude 124.1697 W
Elevation (m) --
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Spans20
Plan ShapeStraight
Total Length2507' (764.1m). Bridge spans range from 120' (36.6m) to 225' (68.6m) long.
Width of Deck34' (10.4m)
Construction Date1971
Instrumentation1996. 24 accelerometers on the bridge. 3 accelerometers at a free-field site.
Superstructure TypePrestressed concrete I-girders. Seat abutments.
Substructure TypeHexagonal concrete columns. 1 column per bent.
Foundation TypeConcrete piles.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC.