Lower Silvis
Low HazardSatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | Alaska |
| County | Ketchikan Gateway Borough |
| Nearest City | None |
| River/Stream | Beaver Falls Creek, George Inl |
| Coordinates | 55.38245, -131.50098 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 140 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 1,400 acre-ft |
| Surface Area | 68 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 7,900 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | City of Ketchikan |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/07/2019 |
| Emergency Action Plan | Not Required |