Dams in Ketchikan Gateway Borough, Alaska
10Total Dams
5High Hazard
1Significant
Dam Safety in Ketchikan Gateway Borough, Alaska
Ketchikan Gateway Borough has 10 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 1 carry a significant hazard classification.
The average dam in Ketchikan Gateway Borough is 66 years old. The most common purpose is hydroelectric. The tallest dam is Swan Lake at 174 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 |
|---|---|---|---|---|---|
| Swan Lake | High | Satisfactory | 174 | Hydroelectric | 1984 |
| Lake Connell | High | Satisfactory | 96 | Water Supply | 1953 |
| Whitman Lake | High | Satisfactory | 39 | Hydroelectric | 1927 |
| Ketchikan Lakes | High | Satisfactory | 34 | Hydroelectric | 1957 |
| Carlanna Lake | High | Satisfactory | 31 | Water Supply | 1975 |
| Fawn Lake Dam North | Significant | Satisfactory | 15 | Hydroelectric | 1959 |
| Upper Silvis | Low | Satisfactory | 60 | Hydroelectric | 1968 |
| Lower Silvis | Low | Satisfactory | 32 | Hydroelectric | 1954 |
| Ward Cove Cannery Dam | Low | Not Rated | 27 | Water Supply | 1932 |
| Bluff Lake Diversion | Low | Not Rated | 10 | Hydroelectric | 1984 |