Dams in Petersburg Borough, Alaska
3Total Dams
1High Hazard
2Significant
Dam Safety in Petersburg Borough, Alaska
Petersburg Borough has 3 dams tracked in the National Inventory of Dams. Of these, 1 are classified as high hazard — meaning failure would probably cause loss of human life. Another 2 carry a significant hazard classification.
The average dam in Petersburg Borough is 59 years old. The most common purpose is water supply. The tallest dam is Crystal Lake at 43 ft.
Explore more: Oldest dams in Alaska · 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 |
|---|---|---|---|---|---|
| Crystal Lake | High | Satisfactory | 43 | Hydroelectric | 1955 |
| Cabin Creek Dam | Significant | Fair | 38 | Water Supply | 1996 |
| Petersburg Upper Dam | Significant | Fair | 27 | Water Supply | 1950 |