Dams in Gem County, Idaho
7Total Dams
2High Hazard
5Significant
Dam Safety in Gem County, Idaho
Gem County has 7 dams tracked in the National Inventory of Dams. Of these, 2 are classified as high hazard — meaning failure would probably cause loss of human life. Another 5 carry a significant hazard classification.
The average dam in Gem County is 71 years old. The most common purpose is other. The tallest dam is Black Canyon Diversion Dam at 183 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 |
|---|---|---|---|---|---|
| Black Canyon Diversion Dam | High | Not Available | 183 | Hydroelectric | 1924 |
| Aikman | High | Fair | 77 | Irrigation | 1999 |
| Sage Hen | Significant | Fair | 46 | Other | 1939 |
| Little (upper Bissel Creek Dam) | Significant | Fair | 37 | Other | 1963 |
| Haw Creek | Significant | Fair | 27 | Other | 1970 |
| Gatfield No 2 | Significant | Fair | 20 | Other | 1951 |
| Gatfield No 1 | Significant | Fair | 16 | Other | 1938 |