Information for Strong-Motion Station
Long Beach - Gerald Desmond Bridge
CGS - CSMIP Station 14703
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.7646 N
Longitude 118.2212 W
Elevation (m) --
Site Geology Deep alluvium
Vs30 (m/sec) 225 (measured)
Site Class D
Remarks/Notes Site information sources
No. of Spans3 (Main Span)
Plan ShapeStraight (Main Span)
Total Length2000\' (Main Span)
Width of Deck156\' (Main Span)
Construction Date2020
Instrumentation2020. 62 accelerometers on the bridge, and 12 accelerometers at a reference geotechnical array
Superstructure TypeMain Span: Steel-concrete composite ladder beam deck system supported by stay cables. Superstructure is fully isolated from substructure by viscous dampers at both towers and end bents. East Approach: post-tensioned concrete box girders
Substructure TypeMain Span: Hollow reinforced concrete mono-pole towers. East Approach: Hollow reinforced concrete bents.
Foundation TypeConcrete pile caps with CIDH concrete piles.
RemarksThis bridge is California\'s first long-span cable-stayed bridge, and one of the tallest bridges of its kind in the United States. This bridge replaces the old Gerald Desmond Bridge. It is instrumented under the interagency agreement between Caltrans and Dept. of Conservation.