Dams in Riverside County, California
46Total Dams
40High Hazard
2Significant
Dam Safety in Riverside County, California
Riverside County has 46 dams tracked in the National Inventory of Dams. Of these, 40 are classified as high hazard — meaning failure would probably cause loss of human life. Another 2 carry a significant hazard classification. Currently, 1 dams have a condition assessment of poor or unsatisfactory.
The average dam in Riverside County is 61 years old. The most common purpose is water supply. The tallest dam is Diamond Valley Lake at 284 ft.
Explore more: Oldest dams in California · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Diamond Valley Lake | High | Satisfactory | 284 | Water Supply | 2000 |
| Mathews | High | Satisfactory | 264 | Water Supply | 1938 |
| Vail | High | Fair | 152 | Water Supply | 1949 |
| Lake Hemet | High | Satisfactory | 135 | Water Supply | 1895 |
| Perris | High | Satisfactory | 130 | Water Supply | 1973 |
| Robert A Skinner | High | Satisfactory | 109 | Other | 1973 |
| Railroad Canyon | High | Satisfactory | 94 | Water Supply | 1928 |
| Wide Canyon | High | Satisfactory | 84 | Flood Risk Reduction | 1968 |
| Mockingbird Canyon | High | Satisfactory | 74 | Water Supply | 1914 |
| Alessandro | High | Satisfactory | 66 | Flood Risk Reduction | 1956 |
| Sycamore | High | Satisfactory | 63 | Flood Risk Reduction | 1956 |
| Eagle Canyon Debris Basin | High | Satisfactory | 60 | Flood Risk Reduction | 2015 |
| Mcvicker Canyon Debris Basin | High | Fair | 55 | Flood Risk Reduction | |
| Harrison Street | High | Satisfactory | 50 | Flood Risk Reduction | 1954 |
| Box Springs | High | Satisfactory | 49 | Flood Risk Reduction | 1960 |
| Lee Lake | High | Poor | 47 | Water Supply | 1893 |
| Mabey Canyon | High | Satisfactory | 46 | Flood Risk Reduction | 1974 |
| Skinner Clearwell | High | Satisfactory | 44 | Water Supply | 1991 |
| Prenda | High | Satisfactory | 44 | Flood Risk Reduction | 1954 |
| Woodcrest | High | Satisfactory | 44 | Flood Risk Reduction | 1954 |
| Tahchevah | High | Satisfactory | 42 | Debris Control | 1964 |
| Sunnymead Ranch | High | Satisfactory | 41 | Water Supply | 1985 |
| Hall Mill Dam | High | Not Rated | 40 | Other | 1949 |
| Mary Street | High | Satisfactory | 40 | Flood Risk Reduction | 1981 |
| Pigeon Pass | High | Satisfactory | 40 | Flood Risk Reduction | 1958 |
| Foster | High | Satisfactory | 38 | Water Supply | 1945 |
| Quail Valley | High | Satisfactory | 37 | Water Supply | 1959 |
| Lakeview | High | Satisfactory | 37 | Flood Risk Reduction | 1994 |
| Oak Street | High | Satisfactory | 36 | Flood Risk Reduction | 1979 |
| Henry J. Mills No. 2 | High | Satisfactory | 34 | Water Supply | 1996 |
| Tahquitz Creek Debris Basin | High | Satisfactory | 32 | Debris Control | 1991 |
| Declez Retention | High | Satisfactory | 30 | Flood Risk Reduction | 1984 |
| Silt Pond | High | Not Available | 25 | Tailings | |
| Henry J. Mills Reservoir | High | Satisfactory | 23 | Water Supply | 1979 |
| Jurupa Basin | High | Satisfactory | 22 | Flood Risk Reduction | 1983 |
| Fresh Water | High | Not Available | 17 | Water Supply | |
| Goodhart Canyon Detention Basin | High | Satisfactory | 15 | Flood Risk Reduction | 1999 |
| Dam Lake Norconian South | High | Fair | 15 | Recreation | 1928 |
| Fairmount Park | High | Satisfactory | 12 | Water Supply | 1923 |
| Metz Road Detention Basin | High | Satisfactory | 12 | Flood Risk Reduction | 1981 |
| Hj Mills Reclamation | Significant | Satisfactory | 48 | Water Supply | 1996 |
| Cajalco Creek | Significant | Satisfactory | 46 | Debris Control | 2001 |
| Dunn Ranch | Low | Satisfactory | 44 | Water Supply | 1987 |
| Diamond Valley Lake Forebay | Low | Satisfactory | 22 | Other | 1999 |
| West Side Detention Dike 3 | Low | Not Available | 22 | Irrigation | 1970 |
| El Casco | Low | Satisfactory | 19 | Water Supply | 1879 |