Hydaburg Dam is an other dam located in Prince of Wales-Hyder Census Area, Alaska, built in 1939. It carries a Significant hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 85 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Hydaburg Dam
The primary purpose of Hydaburg Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Hydaburg (local government). It impounds the Hydaburg River near Hydaburg.
The dam stands 8 feet tall and stretches 85 feet across, and has a maximum storage capacity of 8 acre-feet. Completed in 1939, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 08/07/2015. That was over 11 years ago.
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Location
| State | Alaska |
| County | Prince of Wales-Hyder Census Area |
| Nearest City | Hydaburg |
| River/Stream | Hydaburg River |
| Coordinates | 55.21833, -132.80000 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 8 ft |
| Dam Length | 85 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 8 acre-ft |
| Max Storage | 8 acre-ft |
| Normal Storage | 8 acre-ft |
| Max Discharge | 100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Hydaburg |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 08/07/2015 |
| Emergency Action Plan | No |
Identifiers
| NID ID | AK00120 |
| Federal ID | AK00120 |
| More Info | State Dam Safety Program |