Draper Dam
Key Takeaway
Draper 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 | 20 ft (taller than 33.7% in SD) |
| Dam Length | 700 ft |
| Dam Type | Earth |
| Max Storage | 553 acre-ft |
| Normal Storage | 260 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,970 cfs |
| Year Completed | 1939 (87 years old) |
| NID ID | SD02139 |
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
CITY OF DRAPER
Local Government
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Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Draper Dam?
Draper 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 Draper Dam?
Draper Dam is owned by CITY OF DRAPER (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Draper Dam built?
Draper 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 Draper Dam?
Draper Dam serves the following purposes: Recreation, 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 Draper Dam?
Draper Dam has a dam height of 20 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 Draper Dam last inspected?
Draper Dam was last inspected on November 14, 1980. Inspection dates indicate when a formal review occurred, not the results of that inspection.