North Fork Diversion Dam
Key Takeaway
North Fork Diversion Dam is classified as high hazard in Oregon. It was completed in 1928 and is 98 years old. Its primary use is hydroelectric. 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 | 45 ft (taller than 80.5% in OR) |
| Dam Length | 384 ft |
| Dam Type | Concrete |
| Max Storage | 450 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 312 sq mi |
| Max Discharge | 27,325 cfs |
| Year Completed | 1928 (98 years old) |
| NID ID | OR00560 |
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
PacifiCorp
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of North Fork Diversion Dam?
North Fork Diversion Dam 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 North Fork Diversion Dam?
North Fork Diversion Dam is owned by PacifiCorp (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was North Fork Diversion Dam built?
North Fork Diversion Dam was completed in 1928, making it 98 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 North Fork Diversion Dam?
North Fork Diversion 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 North Fork Diversion Dam?
North Fork Diversion Dam has a dam height of 45 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 North Fork Diversion Dam last inspected?
North Fork Diversion Dam was last inspected on September 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.