CESMD
Information for Strong-Motion Station
Palmdale - Hwy 14/Barrel Springs Bridge
CGS - CSMIP Station 24706
Earthquakes recorded by this station
 
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
   
Latitude 34.5463 N
Longitude 118.1301 W
Elevation (m) 895
Site Geology Thin fill/alluv (10m) over granitic rock
Vs30 (m/sec) 501 (measured)
Site Class C
Remarks/Notes Site information sources
 
No. of Spans5
Plan ShapeStraight with skew.
Total Length444' (135.3m). Bridge spans range from 68' (20.7m) to 100' (30.5m).
Width of Deck40' (12.2m)
Construction Date1965
Instrumentation1994. 9 accelerometers on the bridge. 3 accelerometers at a free-field site.
 
Superstructure TypeConcrete box girders. Open end diaphragm abutments.
Substructure TypeRectangular concrete columns. 2 columns per bent.
Foundation TypeSpread footings support all bents and abutments.
RemarksThis bridge was instrumented under the interagency agreement between Caltrans and DOC. The bridge was retrofitted.