Dams in Placer County, California
39Total Dams
23High Hazard
4Significant
Dam Safety in Placer County, California
Placer County has 39 dams tracked in the National Inventory of Dams. Of these, 23 are classified as high hazard — meaning failure would probably cause loss of human life. Another 4 carry a significant hazard classification.
The average dam in Placer County is 94 years old. The most common purpose is hydroelectric. The tallest dam is Hell Hole at 410 ft.
Explore more: Oldest dams in California · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Hell Hole | High | Fair | 410 | Irrigation | 1966 |
| Sugar Pine | High | Satisfactory | 251 | Other | 1981 |
| L. L. Anderson | High | Satisfactory | 231 | Irrigation | 1965 |
| Reservoir A | High | Satisfactory | 93 | Water Supply | 1973 |
| Ralston Afterbay | High | Fair | 89 | Irrigation | 1966 |
| Drum Forebay | High | Satisfactory | 65 | Hydroelectric | 1913 |
| Lake Arthur | High | Satisfactory | 44 | Other | 1909 |
| Lake Theodore | High | Satisfactory | 40 | Other | 1896 |
| Halsey Afterbay | High | Satisfactory | 40 | Hydroelectric | 1913 |
| Spring Valley Ranch | High | Satisfactory | 39 | Other | 1958 |
| Upper Peak Lake | High | Satisfactory | 39 | Hydroelectric | 1850 |
| Rock Creek | High | Satisfactory | 36 | Hydroelectric | 1913 |
| Lakewood | High | Satisfactory | 33 | Water Supply | 1959 |
| Kelly Lake | High | Satisfactory | 24 | Hydroelectric | 1928 |
| Mammoth Reservoir | High | Satisfactory | 23 | Other | 1851 |
| Lake Alta | High | Fair | 22 | Other | 1862 |
| Hinkle | High | Satisfactory | 20 | Water Supply | 1980 |
| Wise Forebay | High | Satisfactory | 20 | Hydroelectric | 1913 |
| Putts Lake | High | Satisfactory | 19 | Other | 1916 |
| Lake Tahoe Dam | High | Not Available | 18 | Irrigation | 1913 |
| Quail Lake Dam | High | Not Rated | 17 | Flood Risk Reduction | |
| Kidd Lake Auxiliary | High | Satisfactory | 15 | Hydroelectric | 1850 |
| Lower Peak Lake Auxiliary | High | Satisfactory | 7 | Hydroelectric | 1860 |
| North Fork Dam | Significant | Not Available | 155 | Debris Control | 1939 |
| Halsey Forebay No. 2 | Significant | Satisfactory | 55 | Hydroelectric | 1913 |
| Winchester | Significant | Satisfactory | 39 | Water Supply | 1999 |
| Lake Valley Auxiliary | Significant | Satisfactory | 28 | Hydroelectric | 1889 |
| Drum Afterbay | Low | Satisfactory | 102 | Hydroelectric | 1968 |
| Wastewater Storage | Low | Satisfactory | 75 | Water Supply | 1978 |
| Middle Fork Interbay | Low | Satisfactory | 71 | Irrigation | 1966 |
| Morning Star | Low | Satisfactory | 44 | Water Supply | 1870 |
| Auburn Valley Country Club #3 | Low | Satisfactory | 39 | Water Supply | 1959 |
| Clover Valley | Low | Satisfactory | 35 | Other | 1909 |
| Duncan Creek Diversion | Low | Satisfactory | 32 | Irrigation | 1965 |
| Snowfler | Low | Satisfactory | 28 | Water Supply | 1964 |
| Boole | Low | Satisfactory | 25 | Other | 1951 |
| Miners Ravine Detention | Low | Satisfactory | 23 | Flood Risk Reduction | 2007 |
| Lake Mary | Low | Satisfactory | 22 | Other | 1926 |
| Ice Lakes | Low | Satisfactory | 12 | Water Supply | 1942 |