California Dams
1,436 dams tracked by the National Inventory of Dams
Total Dams
1,436
High Hazard
821
57.2%
Poor / Unsatisfactory
66
Average Age
77 yrs
Hazard Classification
High821 (57.2%)
Significant160 (11.1%)
Low455 (31.7%)
Condition Assessment
Satisfactory1,093 (76.1%)
Fair106 (7.4%)
Poor / Unsatisfactory66 (4.6%)
Not Rated171 (11.9%)
Federal
163
State
50
Local
322
Private
617
Tallest Dams
- New Bullards Bar645 ft
- New Melones Dam625 ft
- Shasta Dam602 ft
- Don Pedro Main585 ft
- Seven Oaks550 ft
High Hazard Dams
- New Bullards BarHigh
- New Melones DamHigh
- Shasta DamHigh
- Don Pedro MainHigh
- Seven OaksHigh
Poor Condition Dams
- CastaicPoor
- NacimientoPoor
- AndersonUnsatisfactory
- El CapitanPoor
- Santa FeliciaPoor
All Dams in California
Showing 726–750 of 821
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sunnymead Ranch Riverside County | 41 | 1985 | High | Poor |
| Sunset North Basin San Francisco County | 74 | 1938 | High | Satisfactory |
| Sunset South Basin San Francisco County | 34 | 1960 | High | Satisfactory |
| Sutherland San Diego County | 162 | 1954 | High | Satisfactory |
| Sutro Reservoir San Francisco County | 55 | 1952 | High | Satisfactory |
| Suttenfield Sonoma County | 76 | 1938 | High | Fair |
| Swan Nevada County | 59 | 1967 | High | Satisfactory |
| Swanzy Lake Solano County | 86 | 1931 | High | Poor |
| Sweetwater Main San Diego County | 112 | 1888 | High | Fair |
| Sworinger Lassen County | 35 | 1961 | High | Satisfactory |
| Sycamore Riverside County | 63 | 1956 | High | Satisfactory |
| Sycamore Canyon Ventura County | 40 | 1981 | High | Satisfactory |
| Syphon Canyon Orange County | 59 | 1949 | High | Satisfactory |
| Tabeaud Amador County | 136 | 1901 | High | Poor |
| Tahchevah Riverside County | 42 | 1964 | High | Satisfactory |
| Tahquitz Creek Debris Basin Riverside County | 32 | 1991 | High | Satisfactory |
| Tanner Calaveras County | 35 | 1959 | High | Satisfactory |
| Tennessee Valley Dam Marin County | 30 | — | High | Not Available |
| Terminal San Luis Obispo County | 53 | 1969 | High | Satisfactory |
| Terminus Dam Tulare County | 255 | 1962 | High | Not Available |
| The Hill Ranch Sonoma County | 49 | 1955 | High | Satisfactory |
| Thermalito Afterbay Butte County | 39 | 1967 | High | Fair |
| Thermalito Diversion Butte County | 143 | 1967 | High | Satisfactory |
| Thermalito Forebay Butte County | 91 | 1967 | High | Satisfactory |
| Thomas Briles Modoc County | 23 | 1910 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.