CESMD |
Information for Strong-Motion Station |
Lower Crystal Springs Dam |
CGS - CSMIP Station 58233 |
Earthquakes recorded by this station |
Latitude | 37.5288 N |
Longitude | 122.3622 W |
Elevation (m) | 57 |
Site Geology | Franciscan greywacke |
Vs30 (m/sec) | 586 (inferred) |
Site Class | C |
Remarks/Notes | Site information sources |
Dam Height | 148' |
Plan Shape | Curved |
Crest Length | 600' |
Crest Width | 41' (max) |
Construction Date | 1888 |
Instrumentation | 1978, 15 accelerometers on crest, abutment, toe, and downstream. 2010, instrumentation removed. 2023, 12 accelerometers at the dam and 3 accelerometers at a reference free-field station. |
Superstructure Type | -- |
Dam Type | Concrete gravity. |
Foundation Type | -- |
Remarks | The 2010 improvement project included widening of the spillway, raising the parapet wall, & enlarging the stilling basin. |