Olson-Agassiz
Key Takeaway
Olson-Agassiz is classified as significant hazard in Minnesota. It was completed in 1983 and is 43 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 13 ft (taller than 45.7% in MN) |
| Dam Length | 4,400 ft |
| Dam Type | Earth |
| Max Storage | 2.5K acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 36 sq mi |
| Max Discharge | 7,000 cfs |
| Year Completed | 1983 (43 years old) |
| Year Modified | 1989 |
| NID ID | MN01009 |
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
WD of Wild Rice
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Olson-Agassiz?
Olson-Agassiz 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 Olson-Agassiz?
Olson-Agassiz is owned by WD of Wild Rice (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Olson-Agassiz built?
Olson-Agassiz was completed in 1983, making it 43 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 Olson-Agassiz?
Olson-Agassiz serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Olson-Agassiz?
Olson-Agassiz has a dam height of 13 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 Olson-Agassiz last inspected?
Olson-Agassiz was last inspected on August 11, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.