Information for Strong-Motion Station
Eureka - Eureka Channel Bridge
CGS - CSMIP Station 89736
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 40.8090 N
Longitude 124.1547 W
Elevation (m) --
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Spans15
Plan ShapeStraight and curved.
Total Length1816' (553.5m). Bridge spans range from 81' (24.7m) to 190' (57.9m) long.
Width of Deck34' (10.4m)
Construction Date1971
Instrumentation1996. 9 accelerometers on the bridge. 3 accelerometers at a free-field site.
Superstructure TypeContinuous concrete box girders in spans 1,2, and 3. Prestressed concrete I-girders joined together with concrete diaphragms in other spans. Seat abutments with elastomeric bearings.
Substructure TypeHexagonal concrete columns. 1 column per bent.
Foundation TypeConcrete piles.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC.