Mirage
Key Takeaway
Mirage is classified as low hazard in South Dakota. It was completed in 1972 and is 54 years old. Its primary use is water supply.
Physical Details
| Dam Height | 38 ft (taller than 95.8% in SD) |
| Dam Length | 720 ft |
| Dam Type | Earth |
| Max Storage | 1.6K acre-ft |
| Normal Storage | 810 acre-ft |
| Max Discharge | 5,000 cfs |
| Year Completed | 1972 (54 years old) |
| NID ID | SD00038 |
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
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mirage?
Mirage 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 Mirage?
Mirage is owned by GF&P (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mirage built?
Mirage was completed in 1972, making it 54 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 Mirage?
Mirage serves the following purposes: Water Supply, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mirage?
Mirage has a dam height of 38 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 Mirage last inspected?
Mirage was last inspected on October 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.