Dams in San Bernardino County, California
44Total Dams
37High Hazard
4Significant
Dam Safety in San Bernardino County, California
San Bernardino County has 44 dams tracked in the National Inventory of Dams. Of these, 37 are classified as high hazard — meaning failure would probably cause loss of human life. Another 4 carry a significant hazard classification. Currently, 1 dams have a condition assessment of poor or unsatisfactory.
The average dam in San Bernardino County is 58 years old. The most common purpose is water supply. The tallest dam is Seven Oaks at 550 ft.
Explore more: Oldest dams in California · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Seven Oaks | High | Satisfactory | 550 | Flood Risk Reduction | 1999 |
| Cedar Springs | High | Fair | 249 | Water Supply | 1971 |
| New Lake Arrowhead | High | Satisfactory | 225 | Water Supply | 1976 |
| Mojave River Dam - Saddle Dike 1 | High | Not Available | 200 | Flood Risk Reduction | 1971 |
| Copper Basin | High | Satisfactory | 184 | Water Supply | 1938 |
| San Antonio Dam | High | Not Available | 160 | Flood Risk Reduction | 1956 |
| Gene Wash | High | Satisfactory | 140 | Water Supply | 1937 |
| Crafton Hills | High | Satisfactory | 95 | Water Supply | 2001 |
| Lake Gregory | High | Satisfactory | 90 | Water Supply | 1938 |
| Day Creek Debris Basin | High | Satisfactory | 90 | Debris Control | 1988 |
| Devil Canyon Second Afterbay | High | Satisfactory | 88 | Water Supply | 1995 |
| Bear Valley | High | Satisfactory | 80 | Water Supply | 1911 |
| Deer Canyon Debris Basin | High | Satisfactory | 78 | Debris Control | 1980 |
| Small Canyon | High | Satisfactory | 68 | Debris Control | 1957 |
| Cucamonga Creek Debris Basin | High | Satisfactory | 60 | Debris Control | 1980 |
| Glen Martin | High | Fair | 55 | Water Supply | 1950 |
| Mineral Hot Springs Lake | High | Satisfactory | 54 | Water Supply | 1967 |
| Etiwanda Debris Basin | High | Satisfactory | 51 | Flood Risk Reduction | 2008 |
| Cactus Basin #4 | High | Satisfactory | 50 | Flood Risk Reduction | 2022 |
| Yucaipa No. 2 | High | Satisfactory | 49 | Water Supply | 1978 |
| San Sevaine Basin #5 | High | Satisfactory | 49 | Debris Control | 2004 |
| Amethyst Basin | High | Satisfactory | 45 | Flood Risk Reduction | 2019 |
| Yucaipa No. 1 | High | Satisfactory | 42 | Water Supply | 1978 |
| Cactus Basin #3 | High | Satisfactory | 38 | Flood Risk Reduction | 2017 |
| Grass Valley | High | Satisfactory | 35 | Other | 1964 |
| Demens Creek Debris Basin | High | Satisfactory | 35 | Debris Control | 1980 |
| Prado Dam - California Institute For Women Dike | High | Not Available | 32 | Flood Risk Reduction | 2017 |
| Perris Hill Reservoir | High | Satisfactory | 31 | Water Supply | 1962 |
| Jenks Lake - Dam | High | Not Rated | 30 | Fish and Wildlife Pond | 1875 |
| Alta Loma Basin #1 | High | Satisfactory | 30 | Flood Risk Reduction | 1964 |
| Jurupa Basin | High | Satisfactory | 29 | Flood Risk Reduction | 2001 |
| Cedar Lake | High | Satisfactory | 28 | Water Supply | 1928 |
| Little Mountain | High | Satisfactory | 28 | Flood Risk Reduction | 1958 |
| Alta Loma Basin #2 | High | Satisfactory | 22 | Flood Risk Reduction | 1971 |
| Upland Basin | High | Satisfactory | 20 | Flood Risk Reduction | 2008 |
| Devils Canyon Dike #1 | High | Satisfactory | 15 | Other | 1934 |
| Rancho Cielito | High | Satisfactory | 9 | Water Supply | 1912 |
| Lake Arrowhead | Significant | Poor | 190 | Water Supply | 1922 |
| Sheep Canyon | Significant | Not Rated | 35 | Debris Control | 1941 |
| Chino Ranch #1 | Significant | Satisfactory | 22 | Water Supply | 1918 |
| Hickory Basin | Significant | Satisfactory | 19 | Flood Risk Reduction | 2001 |
| Green Valley Lake | Low | Satisfactory | 56 | Water Supply | 1925 |
| Yucaipa No. 3 | Low | Satisfactory | 35 | Water Supply | 1978 |
| Silt / Tails | Low | Not Available | 10 | Water Supply |