Post Lake Dam
Key Takeaway
Post Lake Dam is classified as low hazard in South Dakota. It was completed in 1936 and is 90 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 400 ft |
| Dam Type | Earth |
| Max Storage | 344 acre-ft |
| Normal Storage | 288 acre-ft |
| Max Discharge | 500 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | SD00444 |
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
DAKOTA SPUR LLC.
Private
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Post Lake Dam?
Post Lake 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 Post Lake Dam?
Post Lake Dam is owned by DAKOTA SPUR LLC. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Post Lake Dam built?
Post Lake Dam was completed in 1936, making it 90 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 Post Lake Dam?
Post Lake Dam 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 Post Lake Dam?
Post Lake 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.