D.O.E. Rocky Flats A-4
Key Takeaway
D.O.E. Rocky Flats A-4 is classified as low hazard in Colorado. It was completed in 1979 and is 47 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 40 ft (taller than 81.3% in CO) |
| Dam Length | 1,050 ft |
| Dam Type | Earth |
| Max Storage | 160 acre-ft |
| Normal Storage | 99 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 6,000 cfs |
| Year Completed | 1979 (47 years old) |
| Year Modified | 1996 |
| NID ID | CO02243 |
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
DOE LEGACY MANAGEMENT
Federal Government
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Low Hazard 14 ftFrequently Asked Questions
What is the hazard classification of D.O.E. Rocky Flats A-4?
D.O.E. Rocky Flats A-4 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 D.O.E. Rocky Flats A-4?
D.O.E. Rocky Flats A-4 is owned by DOE LEGACY MANAGEMENT (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was D.O.E. Rocky Flats A-4 built?
D.O.E. Rocky Flats A-4 was completed in 1979, making it 47 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 D.O.E. Rocky Flats A-4?
D.O.E. Rocky Flats A-4 serves the following purposes: Flood Risk Reduction, Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is D.O.E. Rocky Flats A-4?
D.O.E. Rocky Flats A-4 has a dam height of 40 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 D.O.E. Rocky Flats A-4 last inspected?
D.O.E. Rocky Flats A-4 was last inspected on October 20, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.