Lathum Dam
Key Takeaway
Lathum Dam is classified as significant hazard in South Dakota. It was completed in 1939 and is 87 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 45.6% in SD) |
| Dam Length | 850 ft |
| Dam Type | Earth |
| Max Storage | 634 acre-ft |
| Normal Storage | 180 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 3,350 cfs |
| Year Completed | 1939 (87 years old) |
| Year Modified | 2000 |
| NID ID | SD00658 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
S&PL
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lathum Dam?
Lathum Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lathum Dam?
Lathum Dam is owned by S&PL (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lathum Dam built?
Lathum Dam was completed in 1939, making it 87 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 Lathum Dam?
Lathum 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 Lathum Dam?
Lathum Dam has a dam height of 22 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 Lathum Dam last inspected?
Lathum Dam was last inspected on July 28, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.