Little Yellow 20
Key Takeaway
Little Yellow 20 is classified as low hazard in Wisconsin. It was completed in 1936 and is 90 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 8 ft (taller than 5.5% in WI) |
| Dam Length | 42 ft |
| Dam Type | Gravity |
| Max Storage | 70 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 486 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | WI00578 |
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
Wisconsin Department of Natural Resources
State Government
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Little Yellow 20?
Little Yellow 20 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 Little Yellow 20?
Little Yellow 20 is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Little Yellow 20 built?
Little Yellow 20 was completed in 1936, making it 90 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 Little Yellow 20?
Little Yellow 20 serves the following purposes: Irrigation, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Little Yellow 20?
Little Yellow 20 has a dam height of 8 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 Little Yellow 20 last inspected?
Little Yellow 20 was last inspected on June 15, 2007. Inspection dates indicate when a formal review occurred, not the results of that inspection.