Dams in Adams County, Idaho
8Total Dams
6High Hazard
1Significant
Dam Safety in Adams County, Idaho
Adams County has 8 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. Currently, 1 dams have a condition assessment of poor or unsatisfactory.
The average dam in Adams County is 90 years old. The most common purpose is other. The tallest dam is Hells Canyon at 330 ft.
Explore more: Oldest dams in Idaho · Tallest dams · High risk dams · Largest reservoirs
Data note: Hazard potential describes the consequences if a dam failed; it does not predict the likelihood of failure. Inspection, condition, and emergency-plan fields can be incomplete or delayed. Check state dam-safety officials and local emergency managers for official guidance.
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Hells Canyon | High | Satisfactory | 330 | Hydroelectric | 1967 |
| Oxbow | High | Fair | 209 | Hydroelectric | 1961 |
| Brundage | High | Fair | 63 | Other | 1936 |
| C Ben Ross | High | Fair | 61 | Other | 1937 |
| Lost Valley | High | Poor | 31 | Other | 1910 |
| Goose Lake | High | Fair | 27 | Irrigation | 1919 |
| Hancock | Significant | Fair | 29 | Fish and Wildlife Pond | 1931 |
| Twin Granite | Low | Fair | 25 | Irrigation | 1920 |