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| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| CESMD |
| Information for Strong-Motion Station |
| Hopland - Hwy 101/Railroad Bridge |
| CGS - CSMIP Station 69760 |
| Earthquakes recorded by this station |
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| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| Latitude | 38.9550 N |
| Longitude | 123.1051 W |
| Elevation (m) | 157 |
| Site Geology | |
| Vs30 (m/sec) | |
| Site Class |
| No. of Spans | 6 |
| Plan Shape | Straight. |
| Total Length | 310' (94.5m). Bridge spans range from 45' (13.7m) to 70' (21.3m) long. |
| Width of Deck | 34' (10.4m) |
| Construction Date | 1966 |
| Instrumentation | 1997. 13 accelerometers on the bridge. 3 accelerometers at a free-field site. |
| Superstructure Type | Concrete box girder. 1 diaphragm abutment and 1 strut abutment. |
| Substructure Type | Concrete columns retrofitted with steel jackets. 1 column per bent. |
| Foundation Type | Concrete piles support one abutment and Bents 2 to 4. Spread footings support the other abutment and Bent 5. |
| Remarks | This bridge was instrumented under the interagency agreement between Caltrans and DOC. The bridge was retrofitted in 1996. |