Jeffers Upper
Key Takeaway
Jeffers Upper is classified as low hazard in Minnesota. It was completed in 1981 and is 45 years old. Its primary use is recreation.
Physical Details
| Dam Height | 10 ft (taller than 30.9% in MN) |
| Dam Length | 133 ft |
| Dam Type | Earth |
| Max Storage | 321 acre-ft |
| Normal Storage | 267 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 18 cfs |
| Year Completed | 1981 (45 years old) |
| NID ID | MN01041 |
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
City of Prior Lake
Local Government
Nearby Dams
Jeffers Fish Pond
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Low Hazard 7 ftFrequently Asked Questions
What is the hazard classification of Jeffers Upper?
Jeffers Upper 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 Jeffers Upper?
Jeffers Upper is owned by City of Prior Lake (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jeffers Upper built?
Jeffers Upper was completed in 1981, making it 45 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 Jeffers Upper?
Jeffers Upper serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Jeffers Upper?
Jeffers Upper has a dam height of 10 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 Jeffers Upper last inspected?
Jeffers Upper was last inspected on May 17, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.