Information for Strong-Motion Station
Arcata - Hwy 101/Murray Road Bridge
CGS - CSMIP Station 89708
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 40.9563 N
Longitude 124.1161 W
Elevation (m) 28
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Spans4
Plan ShapeStraight
Total Length182' (55.5m). 2 spans at 32.5' (9.9m) and 2 spans at 58.5' (17.8m).
Width of Deck40' (12.2m)
Construction Date1964
Instrumentation1995. 9 accelerometers on the bridge. 3 accelerometers at a free-field site.
Superstructure TypeSix concrete T-beams supported on open end cantilever abutments and concrete bents. T-beams supported on abutments with rocker bearings.
Substructure TypeRectangular concrete columns. 2 columns per bent.
Foundation TypeSpread footings.
RemarksThis bridge was instrumented under an interagency agreement between Caltrans and DOC.