Frog Lake Dam A
Key Takeaway
Frog Lake Dam A is classified as significant hazard in Oregon. It was completed in 1955 and is 71 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 50 ft (taller than 84.1% in OR) |
| Dam Length | 220 ft |
| Dam Type | Earth |
| Max Storage | 530 acre-ft |
| Normal Storage | 460 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 131 sq mi |
| Max Discharge | 1,500 cfs |
| Year Completed | 1955 (71 years old) |
| NID ID | OR00544 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Portland General Electric Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Frog Lake Dam A?
Frog Lake Dam A is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Frog Lake Dam A?
Frog Lake Dam A is owned by Portland General Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Frog Lake Dam A built?
Frog Lake Dam A was completed in 1955, making it 71 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 Frog Lake Dam A?
Frog Lake Dam A serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Frog Lake Dam A?
Frog Lake Dam A has a dam height of 50 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 Frog Lake Dam A last inspected?
Frog Lake Dam A was last inspected on September 20, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.