Dams in Mariposa County, California
12Total Dams
6High Hazard
1Significant
Dam Safety in Mariposa County, California
Mariposa County has 12 dams tracked in the National Inventory of Dams. Of these, 6 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification.
The average dam in Mariposa County is 69 years old. The most common purpose is water supply. The tallest dam is Mcswain at 97 ft.
Explore more: Oldest dams in California · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Mcswain | High | Fair | 97 | Hydroelectric | 1966 |
| Exchequer Dike | High | Satisfactory | 97 | Hydroelectric | 1966 |
| Stockton Creek | High | Satisfactory | 95 | Other | 1950 |
| Bear Dam | High | Not Available | 92 | Flood Risk Reduction | 1954 |
| Mariposa Dam | High | Not Available | 88 | Flood Risk Reduction | 1948 |
| Owens Dam | High | Not Available | 75 | Flood Risk Reduction | 1949 |
| Rice #1 | Significant | Not Rated | 25 | Recreation | 1950 |
| Mcmahon | Low | Satisfactory | 52 | Water Supply | 1957 |
| Hendricks | Low | Satisfactory | 33 | Water Supply | 1958 |
| Green Valley | Low | Satisfactory | 33 | Water Supply | 1957 |
| Whispering Oaks | Low | Satisfactory | 31 | Water Supply | 1968 |
| Metzger | Low | Satisfactory | 30 | Flood Risk Reduction | 1956 |