J. Willey
Key Takeaway
J. Willey is classified as low hazard in South Dakota. It was completed in 1948 and is 78 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 16 ft (taller than 15.7% in SD) |
| Dam Length | 490 ft |
| Dam Type | Earth |
| Max Storage | 116 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,300 cfs |
| Year Completed | 1948 (78 years old) |
| Year Modified | 2005 |
| NID ID | SD00930 |
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
PATRICIA WILLEY REVOCABLE LIVING TRUST
Private
Nearby Dams
R. Lemler
Potter, SD
Low Hazard 14 ftBartels Dam
Potter, SD
Low Hazard 15 ftJoe Mangin
Potter, SD
Low Hazard 12 ftW. Combellick
Potter, SD
Low Hazard 18 ftVogel/Sautner Dam
Potter, SD
Low Hazard 13 ftR. Lemler
Potter, SD
Low Hazard 24 ftR. Heath
Potter, SD
Low Hazard 18 ftNagel Bros.
Potter, SD
Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of J. Willey?
J. Willey 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 J. Willey?
J. Willey is owned by PATRICIA WILLEY REVOCABLE LIVING TRUST (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was J. Willey built?
J. Willey was completed in 1948, making it 78 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 J. Willey?
J. Willey serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is J. Willey?
J. Willey has a dam height of 16 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 J. Willey last inspected?
J. Willey was last inspected on November 5, 2009. Inspection dates indicate when a formal review occurred, not the results of that inspection.