Redwood River
Key Takeaway
Redwood River is classified as significant hazard in Minnesota. It was completed in 1963 and is 63 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 | 27 ft (taller than 77.1% in MN) |
| Dam Length | 75 ft |
| Dam Type | Gravity |
| Max Storage | 450 acre-ft |
| Normal Storage | 300 acre-ft |
| Drainage Area | 260 sq mi |
| Max Discharge | 7,900 cfs |
| Year Completed | 1963 (63 years old) |
| NID ID | MN00072 |
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
City of Marshall
Local Government
Nearby Dams
Twp Road 73
Lyon, MN
Low Hazard 21 ftLake Marshall 30
Lyon, MN
Low Hazard 17 ftLake Marshall 29
Lyon, MN
Low Hazard 14 ftLynd 23
Lyon, MN
Low Hazard 30 ftLake Marshall 32
Lyon, MN
Low Hazard 32 ftLake Marshall 33
Lyon, MN
Low Hazard 17 ftSodus 5
Lyon, MN
Low Hazard 21 ftSodus 6
Lyon, MN
Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Redwood River?
Redwood River 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 Redwood River?
Redwood River is owned by City of Marshall (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Redwood River built?
Redwood River was completed in 1963, making it 63 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 Redwood River?
Redwood River 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 Redwood River?
Redwood River has a dam height of 27 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 Redwood River last inspected?
Redwood River was last inspected on May 19, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.