Duncan
Key Takeaway
Duncan is classified as significant hazard in Colorado. It was completed in 1978 and is 48 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 31 ft (taller than 68.6% in CO) |
| Dam Length | 180 ft |
| Dam Type | Earth |
| Max Storage | 78 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 500 cfs |
| Year Completed | 1978 (48 years old) |
| Year Modified | 2008 |
| NID ID | CO02535 |
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
PURGATORY METRO DISTRICT (HASSEL, ERIC)
Local Government
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Significant Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Duncan?
Duncan 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 Duncan?
Duncan is owned by PURGATORY METRO DISTRICT (HASSEL, ERIC) (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Duncan built?
Duncan was completed in 1978, making it 48 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 Duncan?
Duncan serves the following purposes: Other, Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Duncan?
Duncan has a dam height of 31 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 Duncan last inspected?
Duncan was last inspected on August 18, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.