Hamill Dam
Key Takeaway
Hamill Dam is classified as low hazard in South Dakota. It was completed in 1933 and is 93 years old. Its primary use is water supply.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 752 ft |
| Dam Type | Earth |
| Max Storage | 580 acre-ft |
| Normal Storage | 380 acre-ft |
| Max Discharge | 2,400 cfs |
| Year Completed | 1933 (93 years old) |
| NID ID | SD00537 |
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
ROSEBUD SIOUX TRIBE
Federal Government
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Low Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Hamill Dam?
Hamill 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 Hamill Dam?
Hamill Dam is owned by ROSEBUD SIOUX TRIBE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hamill Dam built?
Hamill Dam was completed in 1933, making it 93 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 Hamill Dam?
Hamill Dam serves the following purposes: Water Supply, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hamill Dam?
Hamill Dam has a dam height of 21 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.