CESMD

Information for Strong-Motion Station

Leggett - Hwy 101/Confusion Hill Bridge

CGS - CSMIP Station 79421

Earthquakes recorded by this station

 

(Station Photograph - click to enlarge)	(Sensor Layout - click to see PDF File)

   

Latitude	39.9213 N
Longitude	123.7634 W
Elevation (m)	245
Site Geology
Vs30 (m/sec)
Site Class

 

No. of Spans	3
Plan Shape	Straight
Total Length	413 meters
Width of Deck	13 m
Construction Date	2009
Instrumentation	2009. 21 accelerometers on the bridge. 3 accelerometers at a free-field site near North Abutment.

 

Superstructure Type	Cast-in-place segmental concrete box girder (one-cell).
Substructure Type	Hollow box concrete column; one column at each pier. The column height is 51.5 m and 51.25 m, at Piers 2 and 3, respecively.
Foundation Type	Piers 2 and 3 are supported by pile caps on 11 1.5m-diameter CIDH concrete piles. Abutments are seat typed with PTFE bearings and supported on CIDH concrete piles.
Remarks	The bridge was instrumented during construction under the interagency agreement between Caltrans and DOC/CGS.