Hayes
Key Takeaway
Hayes is classified as low hazard in South Dakota. It was completed in 1937 and is 89 years old. Its primary use is recreation.
Physical Details
| Dam Height | 17 ft (taller than 20.2% in SD) |
| Dam Length | 670 ft |
| Dam Type | Earth |
| Max Storage | 845 acre-ft |
| Normal Storage | 190 acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 50 sq mi |
| Max Discharge | 9,900 cfs |
| Year Completed | 1937 (89 years old) |
| Year Modified | 1998 |
| NID ID | SD00039 |
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
S&PL
State Government
Nearby Dams
Ralph Hedman
Stanley, SD
Significant Hazard 27 ftNeuharth Dam #2
Stanley, SD
Low Hazard 15 ftHedman #2
Stanley, SD
Low Hazard 18 ftNeuharth Dam #1
Stanley, SD
Low Hazard 13 ftBergeson Dam
Stanley, SD
Low Hazard 18 ftHedman Number 1
Stanley, SD
Low Hazard 30 ftBergeson Dam
Stanley, SD
Low Hazard 30 ftHollingsworth-Shaffer Ranch Dam
Stanley, SD
Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Hayes?
Hayes 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 Hayes?
Hayes is owned by S&PL (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hayes built?
Hayes was completed in 1937, making it 89 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 Hayes?
Hayes serves the following purposes: Recreation, Fire Protection, Stock, Or Small Fish Pond, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hayes?
Hayes has a dam height of 17 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 Hayes last inspected?
Hayes was last inspected on September 20, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.