Williams Dam
Key Takeaway
Williams Dam is classified as low hazard in South Dakota. It was completed in 1935 and is 91 years old. Its primary use is recreation.
Physical Details
| Dam Height | 15 ft (taller than 11.1% in SD) |
| Dam Length | 750 ft |
| Dam Type | Earth |
| Max Storage | 135 acre-ft |
| Normal Storage | 99 acre-ft |
| Max Discharge | 286 cfs |
| Year Completed | 1935 (91 years old) |
| NID ID | SD00646 |
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
GF&P
State Government
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Williams Dam?
Williams Dam 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 Williams Dam?
Williams Dam is owned by GF&P (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Williams Dam built?
Williams Dam was completed in 1935, making it 91 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 Williams Dam?
Williams Dam 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 Williams Dam?
Williams Dam has a dam height of 15 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 Williams Dam last inspected?
Williams Dam was last inspected on November 4, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.