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 151–175 of 455
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Orvis Stanislaus County | 34 | 1959 | Low | Satisfactory |
| Orange County Reservoir Orange County | 103 | 1941 | Low | Satisfactory |
| Oak Site Santa Cruz County | 43 | 1969 | Low | Satisfactory |
| Oakhurst Wastewater Treatment Madera County | 60 | 2005 | Low | Satisfactory |
| North Fork Diversion Alpine County | 53 | 1989 | Low | Satisfactory |
| Nine Springs Lassen County | 16 | 1954 | Low | Satisfactory |
| Nevada City Raw Water Reservoir Nevada County | 48 | 1980 | Low | Satisfactory |
| Nelson Corral Dam (Blm) Lassen County | 12 | 1980 | Low | Not Rated |
| Napa Valley Lake Napa County | 40 | 1990 | Low | Satisfactory |
| Myers Lassen County | 27 | 1957 | Low | Satisfactory |
| Murry Santa Clara County | 54 | 1957 | Low | Satisfactory |
| Mud Lake Modoc County | 10 | 1926 | Low | Satisfactory |
| Mud Fresno County | 14 | 1919 | Low | Satisfactory |
| Muck Valley Afterbay Lassen County | 15 | 1990 | Low | Satisfactory |
| Mount Stoneman Sacramento County | 43 | 1937 | Low | Satisfactory |
| Moskowite Napa County | 50 | 1955 | Low | Satisfactory |
| Morning Star Placer County | 44 | 1870 | Low | Satisfactory |
| Morgan Napa County | 34 | — | Low | Satisfactory |
| Montezuma Solano County | 14 | 2003 | Low | Satisfactory |
| Montana Lake Napa County | 39 | 2009 | Low | Satisfactory |
| Montague No. 2 Siskiyou County | 41 | 1978 | Low | Satisfactory |
| Mono Creek Diversion Fresno County | 64 | 1927 | Low | Satisfactory |
| Mokelumne Hill Calaveras County | 52 | 1973 | Low | Satisfactory |
| Miners Ravine Detention Placer County | 23 | 2007 | Low | Satisfactory |
| Milton Main Nevada County | 37 | 1927 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.