Lower Silvis
Alaska — Ketchikan Gateway Borough County
Location
| State | Alaska |
| County | Ketchikan Gateway Borough |
| Coordinates | 55.38245, -131.50098 |
Physical Characteristics
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 140 ft |
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Surface Area | 68 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1954 |
| Primary Purpose | Hydroelectric |
| Dam Type | — |
| Owner Type | — |
| Owner | City of Ketchikan |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.