Dams in California
1,445
Total Dams
821
High Hazard
56.82%
% High Hazard
77.0 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| Los Angeles | 103 | 81 | 78.64% | 77.1 yrs |
| San Diego | 59 | 44 | 74.58% | 73.8 yrs |
| Riverside | 47 | 42 | 89.36% | 62.5 yrs |
| Napa | 59 | 37 | 62.71% | 67.0 yrs |
| Orange | 43 | 36 | 83.72% | 55.6 yrs |
| Sonoma | 65 | 35 | 53.85% | 60.5 yrs |
| San Bernardino | 42 | 34 | 80.95% | 61.1 yrs |
| Santa Clara | 42 | 26 | 61.90% | 83.3 yrs |
| Contra Costa | 27 | 24 | 88.89% | 66.1 yrs |
| Placer | 39 | 24 | 61.54% | 94.9 yrs |
| Calaveras | 39 | 23 | 58.97% | 75.2 yrs |
| Shasta | 45 | 22 | 48.89% | 78.7 yrs |
| Nevada | 48 | 22 | 45.83% | 104.4 yrs |
| Fresno | 31 | 20 | 64.52% | 81.4 yrs |
| Tuolumne | 32 | 19 | 59.38% | 79.2 yrs |
| El Dorado | 51 | 19 | 37.25% | 70.7 yrs |
| Alameda | 22 | 18 | 81.82% | 66.5 yrs |
| Butte | 26 | 15 | 57.69% | 83.1 yrs |
| Plumas | 24 | 15 | 62.50% | 94.3 yrs |
| Ventura | 16 | 15 | 93.75% | 68.5 yrs |
| Mendocino | 30 | 15 | 50.00% | 70.0 yrs |
| Solano | 20 | 14 | 70.00% | 76.1 yrs |
| Mono | 20 | 14 | 70.00% | 100.3 yrs |
| Lake | 21 | 14 | 66.67% | 62.2 yrs |
| Santa Barbara | 14 | 14 | 100.00% | 74.4 yrs |
| Amador | 22 | 12 | 54.55% | 79.8 yrs |
| San Mateo | 21 | 12 | 57.14% | 106.9 yrs |
| Madera | 22 | 11 | 50.00% | 83.3 yrs |
| Kern | 26 | 11 | 42.31% | 55.0 yrs |
| San Luis Obispo | 13 | 10 | 76.92% | 68.7 yrs |
| Marin | 17 | 10 | 58.82% | 75.2 yrs |
| Modoc | 76 | 9 | 11.84% | 88.6 yrs |
| Sacramento | 20 | 9 | 45.00% | 64.7 yrs |
| Lassen | 53 | 8 | 15.09% | 86.9 yrs |
| Alpine | 26 | 8 | 30.77% | 98.5 yrs |
| San Francisco | 7 | 7 | 100.00% | 92.7 yrs |
| Merced | 11 | 7 | 63.64% | 88.3 yrs |
| Yuba | 16 | 6 | 37.50% | 65.1 yrs |
| Siskiyou | 21 | 6 | 28.57% | 77.4 yrs |
| Mariposa | 12 | 6 | 50.00% | 69.4 yrs |
| Inyo | 8 | 6 | 75.00% | 106.9 yrs |
| Trinity | 6 | 5 | 83.33% | 54.3 yrs |
| Monterey | 17 | 5 | 29.41% | 77.7 yrs |
| Stanislaus | 11 | 4 | 36.36% | 87.2 yrs |
| San Joaquin | 11 | 4 | 36.36% | 60.9 yrs |
| Imperial | 4 | 4 | 100.00% | 58.8 yrs |
| San Benito | 7 | 4 | 57.14% | 81.1 yrs |
| Colusa | 6 | 3 | 50.00% | 82.2 yrs |
| Tulare | 8 | 3 | 37.50% | 90.8 yrs |
| Santa Cruz | 6 | 3 | 50.00% | 76.6 yrs |
| Sierra | 9 | 2 | 22.22% | 91.9 yrs |
| Tehama | 8 | 1 | 12.50% | 67.4 yrs |
| Yolo | 3 | 1 | 33.33% | 47.7 yrs |
| Glenn | 5 | 1 | 20.00% | 72.6 yrs |
| Kings | 5 | 0 | 0.00% | 98.2 yrs |
Purpose Breakdown
Tallest Dams in California
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| New Bullards Bar | 645 ft | Yuba | High Hazard |
| Shasta | 602 ft | Shasta | High Hazard |
| Don Pedro Main | 585 ft | Tuolumne | High Hazard |
| New Melones | 578 ft | Calaveras | High Hazard |
| Seven Oaks | 550 ft | San Bernardino | High Hazard |
| Trinity | 458 ft | Trinity | High Hazard |
| Union Valley | 440 ft | El Dorado | High Hazard |
| Pine Flat Dam | 412 ft | Fresno | High Hazard |
| Mammoth Pool | 411 ft | Madera | High Hazard |
| Hell Hole | 410 ft | Placer | High Hazard |