Wrangell Lower
Key Takeaway
Wrangell Lower is classified as high hazard in Alaska. It was completed in 1968 and is 58 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 28 ft (taller than 49.4% in AK) |
| Dam Length | 315 ft |
| Dam Type | Rockfill |
| Max Storage | 102 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 533 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | AK00014 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CITY OF WRANGELL
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Wrangell Lower?
Wrangell Lower is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Wrangell Lower?
Wrangell Lower is owned by CITY OF WRANGELL (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wrangell Lower built?
Wrangell Lower was completed in 1968, making it 58 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Wrangell Lower?
Wrangell Lower serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Wrangell Lower?
Wrangell Lower has a dam height of 28 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Wrangell Lower last inspected?
Wrangell Lower was last inspected on December 5, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.