North Fork
Key Takeaway
North Fork is classified as high hazard in Oregon. It was completed in 1960 and is 66 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 | 81 ft (taller than 92.2% in OR) |
| Dam Length | 580 ft |
| Dam Type | Earth |
| Max Storage | 305 acre-ft |
| Normal Storage | 257 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,650 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | OR00348 |
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 CORVALLIS
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of North Fork?
North Fork 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?
North Fork is owned by CITY OF CORVALLIS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was North Fork built?
North Fork was completed in 1960, making it 66 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?
North Fork 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 North Fork?
North Fork has a dam height of 81 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 last inspected?
North Fork was last inspected on August 26, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.