Upper Silvis
Alaska — Ketchikan Gateway Borough County — Beaver Falls Creek, George Inl
Location
| State | Alaska |
| County | Ketchikan Gateway Borough |
| River | Beaver Falls Creek, George Inl |
| Coordinates | 55.37996, -131.51893 |
Physical Characteristics
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 135 ft |
| NID Storage | 38,000 acre-ft |
| Max Storage | 38,000 acre-ft |
| Surface Area | 300 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | Not Required |
| Last Inspection | August 7, 2019 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1968 |
| Primary Purpose | Hydroelectric |
| Dam Type | Rockfill |
| Owner Type | Public Utility |
| 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.