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 476–500 of 1,436
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Paicines San Benito County | 29 | 1912 | High | Satisfactory |
| Pacoima Los Angeles County | 365 | 1929 | High | Satisfactory |
| Packer Lake Sierra County | 11 | 1899 | Significant | Not Rated |
| Pacific Grove Monterey County | 32 | 1882 | Low | Satisfactory |
| Owens Dam Mariposa County | 75 | 1949 | High | Not Available |
| Our House Nevada County | 97 | 1969 | High | Satisfactory |
| O`Shaughnessy Tuolumne County | 312 | 1923 | High | Satisfactory |
| Orwick Dam (Blm) Tehama County | 22 | 1950 | Low | Not Rated |
| Orvis Stanislaus County | 34 | 1959 | Low | Satisfactory |
| Orville Napa County | 28 | 1959 | High | Satisfactory |
| Ortega Dam Santa Barbara County | 131 | 1956 | High | Not Available |
| Orchard Estates Retarding Basin Orange County | 21 | 1999 | High | Satisfactory |
| Orange County Reservoir Orange County | 103 | 1941 | Low | Satisfactory |
| O'Neill Forebay Dam Merced County | 88 | 1967 | High | Not Available |
| Olson Napa County | 45 | 1955 | High | Satisfactory |
| Olivenhain San Diego County | 309 | 2003 | High | Satisfactory |
| Oak Street Riverside County | 36 | 1979 | High | Satisfactory |
| Oak Site Santa Cruz County | 43 | 1969 | Low | Satisfactory |
| Oakhurst Wastewater Treatment Madera County | 60 | 2005 | Low | Satisfactory |
| Null Dam Shasta County | 54 | 1954 | Significant | Satisfactory |
| Novato Creek Marin County | 71 | 1951 | High | Satisfactory |
| Notre Dame San Mateo County | 51 | — | High | Satisfactory |
| Norton No. 2 Sonoma County | 28 | 1956 | High | Satisfactory |
| North Fork Diversion Alpine County | 53 | 1989 | Low | Satisfactory |
| North Fork Dam Placer County | 155 | 1939 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.