Blunn
Key Takeaway
Blunn is classified as high hazard in Colorado. It was completed in 1979 and is 47 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 68 ft (taller than 92.4% in CO) |
| Dam Length | 4,180 ft |
| Dam Type | Earth |
| Max Storage | 7.8K acre-ft |
| Normal Storage | 6.4K acre-ft |
| Surface Area | 198 acres |
| Drainage Area | 49 sq mi |
| Max Discharge | 64,000 cfs |
| Year Completed | 1979 (47 years old) |
| NID ID | CO00980 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CITY OF ARVADA (ESSERT, WENDY)
Local Government
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Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Blunn?
Blunn is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Blunn?
Blunn is owned by CITY OF ARVADA (ESSERT, WENDY) (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blunn built?
Blunn 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 Blunn?
Blunn 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 Blunn?
Blunn has a dam height of 68 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 Blunn last inspected?
Blunn was last inspected on March 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.