 |  |
| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| CESMD |
| Information for Strong-Motion Station |
| San Juan Bautista - Hwy 101/156 Overpass |
| CGS - CSMIP Station 47315 |
| Earthquakes recorded by this station |
| |
| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| Latitude | 36.8619 N |
| Longitude | 121.5796 W |
| Elevation (m) | 122 |
| Site Geology | Alluvium |
| Vs30 (m/sec) | 363 (inferred) |
| Site Class | C/D |
| Remarks/Notes | Site information sources |
| No. of Spans | 6 |
| Plan Shape | Straight with skew. |
| Total Length | 321' (97.8m). Bridge spans range from 33.5' (10.2m) to 68.5' (20.9m). |
| Width of Deck | 28' (8.5m) |
| Construction Date | 1958 |
| Instrumentation | 1977 & 2002. 12 accelerometers on the bridge. 3 accelerometers at a free-field site. |
| Superstructure Type | Welded steel girders with concrete diaphragm added during the retrofit supprted by rocker bearings. Seat abutments with catcher beams and integral wing walls. |
| Substructure Type | Concrete bents with rectangular columns. 2 columns per bent. Infill walls were added between the columns during the retrofit. |
| Foundation Type | Spread footings. |
| Remarks | The bridge was first instrumented by CSMIP in 1977. After the retrofit, the bridge was re-instrumented in 2002 under the interagency agreement between Caltrans and DOC. |