CESMD |
Information for Strong-Motion Station |
Palmdale - Hwy 14/Barrel Springs Bridge |
CGS - CSMIP Station 24706 |
Earthquakes recorded by this station |
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 Spans | 5 |
Plan Shape | Straight with skew. |
Total Length | 444' (135.3m). Bridge spans range from 68' (20.7m) to 100' (30.5m). |
Width of Deck | 40' (12.2m) |
Construction Date | 1965 |
Instrumentation | 1994. 9 accelerometers on the bridge. 3 accelerometers at a free-field site. |
Superstructure Type | Concrete box girders. Open end diaphragm abutments. |
Substructure Type | Rectangular concrete columns. 2 columns per bent. |
Foundation Type | Spread footings support all bents and abutments. |
Remarks | This bridge was instrumented under the interagency agreement between Caltrans and DOC. The bridge was retrofitted. |