Information for Strong-Motion Station
Santa Barbara - San Roque Canyon Bridge
CGS - CSMIP Station 25749
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.4497 N
Longitude 119.7350 W
Elevation (m) 96
Site Geology Alluvium over soft rock (shale)
Vs30 (m/sec) 467 (inferred)
Site Class C
Remarks/Notes Site information sources
No. of Spans3
Plan ShapeStraight.
Total Length488' (148.7m). Bridge spans are 144' (43.9m), 144' (43.9m), and 200' (61.0m).
Width of Deck46' (14.0m)
Construction Date1984
Instrumentation1996. 6 accelerometers on the bridge. 3 accelerometers at a free-field site.
Superstructure TypeContinuous concrete box girder. Open end seat abutments with elastomeric bearings and shear keys at the abutments.
Substructure TypeHexagonal concrete piers with flares in the upper portion. 1 column per bent.
Foundation TypeSpread footings support abutments and piers.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC.