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 101–125 of 821
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Strawberry Tuolumne County | 143 | 1916 | High | Fair |
| Stough Debris Basin Los Angeles County | 46 | 1961 | High | Satisfactory |
| Stony Gorge Dam Glenn County | 139 | 1928 | High | Not Available |
| Stone Canyon Los Angeles County | 188 | 1924 | High | Satisfactory |
| Stockton Creek Mariposa County | 95 | 1950 | High | Satisfactory |
| St. Helena Lower Napa County | 44 | 1878 | High | Poor |
| Stewart Canyon Debris Basin Ventura County | 34 | 1963 | High | Satisfactory |
| Stevenson Ranch Los Angeles County | 54 | 2004 | High | Satisfactory |
| Stevens Creek Santa Clara County | 132 | 1935 | High | Fair |
| Stevenot Calaveras County | 70 | 1987 | High | Satisfactory |
| Stanley A. Mahr Reservoir San Diego County | 79 | 1981 | High | Satisfactory |
| Stanford Heights San Francisco County | 31 | 1928 | High | Satisfactory |
| Stampede Dike Sierra County | 90 | 1970 | High | Not Available |
| Spring Valley Ranch Placer County | 39 | 1958 | High | Satisfactory |
| Spring Valley Lake County | 37 | 1968 | High | Satisfactory |
| Spring Creek Debris Dam Shasta County | 196 | 1963 | High | Not Available |
| Spencer Lake San Mateo County | 87 | 1876 | High | Satisfactory |
| Soulajule Marin County | 122 | 1979 | High | Satisfactory |
| Soda Lake Santa Cruz County | 44 | 1978 | High | Satisfactory |
| Sobrante Clearwell Contra Costa County | 28 | 1964 | High | Satisfactory |
| Small Canyon San Bernardino County | 68 | 1957 | High | Satisfactory |
| Sly Park El Dorado County | 182 | 1955 | High | Satisfactory |
| Sly Creek Butte County | 299 | 1961 | High | Satisfactory |
| Sleepy Hollow No. 2 Sonoma County | 39 | 1949 | High | Satisfactory |
| Slab Creek El Dorado County | 250 | 1967 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.