Prospect Forebay Dam
Key Takeaway
Prospect Forebay Dam is classified as low hazard in Oregon. It was completed in 1911 and is 115 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 31 ft (taller than 62.3% in OR) |
| Dam Length | 1,040 ft |
| Dam Type | Earth |
| Normal Storage | 30 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,080 cfs |
| Year Completed | 1911 (115 years old) |
| NID ID | OR04092 |
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
PacifiCorp
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Prospect Forebay Dam?
Prospect Forebay Dam 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 Prospect Forebay Dam?
Prospect Forebay Dam is owned by PacifiCorp (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Prospect Forebay Dam built?
Prospect Forebay Dam was completed in 1911, making it 115 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 Prospect Forebay Dam?
Prospect Forebay Dam 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 Prospect Forebay Dam?
Prospect Forebay Dam has a dam height of 31 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 Prospect Forebay Dam last inspected?
Prospect Forebay Dam was last inspected on September 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.