Rynearson Dam No. 1
Key Takeaway
Rynearson Dam No. 1 is classified as low hazard in Wisconsin. It was completed in 1939 and is 87 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 24 ft (taller than 69.1% in WI) |
| Dam Length | 1,145 ft |
| Dam Type | Earth |
| Max Storage | 10.3K acre-ft |
| Normal Storage | 2.1K acre-ft |
| Surface Area | 800 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 5,355 cfs |
| Year Completed | 1939 (87 years old) |
| NID ID | WI00825 |
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
US FISH AND WILDLIFE SERVICE
Federal Government
Nearby Dams
Sprague Mather and Goose Pool Dam
Juneau, WI
Low Hazard 16 ftRynearson Dam No. 2
Juneau, WI
Low Hazard 20 ftNecedah
Juneau, WI
Low Hazard 20 ftNecedah Wildlife Refuge 30
Juneau, WI
Low Hazard 15 ftLittle Yellow 11
Juneau, WI
Low Hazard 15 ftNecedah Wildlife Refuge 33
Juneau, WI
Low Hazard 7 ftPool Thirty Three
Juneau, WI
Significant Hazard 7 ftNecedah Wildlife Refuge 33
Juneau, WI
Low Hazard 7 ftFrequently Asked Questions
What is the hazard classification of Rynearson Dam No. 1?
Rynearson Dam No. 1 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 Rynearson Dam No. 1?
Rynearson Dam No. 1 is owned by US FISH AND WILDLIFE SERVICE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rynearson Dam No. 1 built?
Rynearson Dam No. 1 was completed in 1939, making it 87 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 Rynearson Dam No. 1?
Rynearson Dam No. 1 serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Rynearson Dam No. 1?
Rynearson Dam No. 1 has a dam height of 24 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 Rynearson Dam No. 1 last inspected?
Rynearson Dam No. 1 was last inspected on July 26, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.