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 451–475 of 1,093
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ione Canal Amador County | 48 | 1962 | Low | Satisfactory |
| Iron Canyon Shasta County | 214 | 1965 | High | Satisfactory |
| Irrigation Reservoir Kern County | 22 | 1980 | High | Satisfactory |
| Isabel Lake No. 1 Santa Clara County | 23 | 1948 | Low | Satisfactory |
| Isabel Lake No. 2 Santa Clara County | 18 | — | Low | Satisfactory |
| Island Weir Kings County | 13 | 1926 | Low | Satisfactory |
| Iverson Lassen County | 45 | 1968 | Low | Satisfactory |
| Jackson Creek Amador County | 193 | 1965 | High | Satisfactory |
| Jackson Creek Spillway Amador County | 37 | — | High | Satisfactory |
| Jackson Lake Nevada County | 29 | 1943 | High | Satisfactory |
| Jackson Meadows Nevada County | 205 | 1965 | High | Satisfactory |
| Jack'S Swamp Dam No. 2 Modoc County | 12 | 1926 | Low | Satisfactory |
| Jacobs Creek El Dorado County | 53 | 1948 | Low | Satisfactory |
| James H. Turner Alameda County | 193 | 1964 | High | Satisfactory |
| Jameson Vineyards Napa County | 41 | — | Significant | Satisfactory |
| James Porter Modoc County | 21 | 1928 | High | Satisfactory |
| Jayne'S Lake Mendocino County | 70 | 1985 | Low | Satisfactory |
| J.C. Jacobsen Kern County | 56 | 1973 | High | Satisfactory |
| Jeff Davis Calaveras County | 114 | 1973 | High | Satisfactory |
| John Carl Warnecke Sonoma County | 32 | 1974 | Low | Satisfactory |
| John Orr Amador County | 20 | 1959 | Low | Satisfactory |
| Johnston San Mateo County | 31 | 1919 | Low | Satisfactory |
| Jones Ranch Trinity County | 36 | 1980 | Significant | Satisfactory |
| Juncal Santa Barbara County | 160 | 1930 | High | Satisfactory |
| Junction El Dorado County | 168 | 1962 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.