16Total Dams
5High Hazard
4Significant
Dam Safety in Jefferson County, Oregon
Jefferson County has 16 dams tracked in the National Inventory of Dams. Of these, 5 are classified as high hazard — meaning failure would probably cause loss of human life. Another 4 carry a significant hazard classification. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Jefferson County is 65 years old. The most common purpose is irrigation. The tallest dam is Round Butte at 440 ft.
Explore more: Oldest dams in Oregon · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Round Butte | High | Fair | 440 | Hydroelectric | 1964 |
| Pelton | High | Satisfactory | 204 | Hydroelectric | 1957 |
| Haystack Dam | High | Not assessed | 105 | Irrigation | 1957 |
| Pelton Regulating | High | Satisfactory | 40 | Other | 1958 |
| Mays | High | Poor | 38 | Irrigation | 1960 |
| Brewer Reservoir (jefferson) | Significant | Not assessed | 32 | Irrigation | 1952 |
| Fuston Ranch Dam | Significant | Not assessed | 30 | Hydroelectric | |
| Gillworth Reservoir | Significant | Not assessed | 29 | Irrigation | 1980 |
| Suttle | Significant | Not assessed | 6 | Fish and Wildlife Pond | 1961 |
| Cherry Creek | Low | Not assessed | 45 | Irrigation | 1980 |
| Little Willow Creek Reservoir | Low | Not assessed | 43 | Irrigation | 1954 |
| Madras Wwt Lagoon | Low | Not assessed | 25 | Irrigation | |
| Morrow Brothers (jefferson) | Low | Not assessed | 25 | Irrigation | 1970 |
| Opal Springs | Low | Satisfactory | 21 | Hydroelectric | 1985 |
| Lyle Reservoir | Low | Not assessed | 15 | Irrigation | 1911 |
| Metolius (lagoon) | Low | Not assessed | 13 |