Lower Crystal Springs Dam
| Lower Crystal Springs Dam | |||||||
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| Coordinates | 37 ° 31 '43 " N , 122 ° 21' 44" W | ||||||
| Data on the structure | |||||||
| Lock type: | Gravity dam | ||||||
| Construction time: | 1887-1890 | ||||||
| Height of the barrier structure : | 57 m | ||||||
| Crown length: | 183 m | ||||||
| Crown width: | 12.2 m | ||||||
| Operator: | San Francisco Public Utilities Commission | ||||||
| Data on the reservoir | |||||||
| Altitude (at congestion destination ) | 85 m | ||||||
| Water surface | 5.35 km² | ||||||
| Storage space | 71.43 million m³ | ||||||
| Catchment area | 76 km² | ||||||
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The Lower Crystal Springs Dam on San Mateo Creek in San Mateo County , California, forms the reservoir of the same name.
The gravity dam was built 30 km from San Francisco just a few hundred meters from the San Andreas Fault . It withstood the strong tremors of the San Francisco earthquake of 1906 and the Loma Prieta earthquake in 1989 without damage. The curved wall is made up of interlocked concrete blocks, and if there is heavy seismic stress, some of the joints may briefly open. When the construction of this wall was completed in 1890, with its height of 44.5 m at the time it was the largest dam in the western world after the Kurit Dam in Persia - until the New Croton Dam was built in 1906 with a height of 91 m. The wall was raised from 44.5 m to 57 m in 1911. The only other dam was the Tibi Dam in Spain, at around 42 to 46 m.
A road that is part of the Sawyer Camp Trail leads over the dam .
See also
- List of the largest dams on earth
- List of the largest reservoirs on earth
- List of the largest hydroelectric plants in the world
- List of dams in the United States
literature
- Mitchell Postel: San Mateo: A Centennial History . Scottwall Associates, San Francisco 1994, ISBN 0942087089 .
Web links
- San Francisco Public Utilities Commission operator's website
- Department of Water Resources: Station Meta Data: Lower Crystal Springs Dam (CRY) - California Data Exchange Center, State of California, 2009.
- Ron Horii: Bay Area Biking: Crystal Springs Trails - Bay Area Back Page, October 1, 2003.
- Photo of the dam in English wikipedia
