Lower Dewey
Key Takeaway
Lower Dewey is classified as low hazard in Alaska. It was completed in 1905 and is 121 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 28 ft (taller than 49.4% in AK) |
| Dam Length | 602 ft |
| Dam Type | Timber Crib |
| Max Storage | 650 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 220 cfs |
| Year Completed | 1905 (121 years old) |
| NID ID | AK00009 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Alaska Power and Telephone Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lower Dewey?
Lower Dewey is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lower Dewey?
Lower Dewey is owned by Alaska Power and Telephone Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Dewey built?
Lower Dewey was completed in 1905, making it 121 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 Lower Dewey?
Lower Dewey serves the following purposes: Hydroelectric, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lower Dewey?
Lower Dewey 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 Lower Dewey last inspected?
Lower Dewey was last inspected on June 5, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.