Arapahoe Lake
Key Takeaway
Arapahoe Lake is classified as significant hazard in Colorado. It was completed in 1974 and is 52 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 36.1% in CO) |
| Dam Length | 425 ft |
| Dam Type | Earth |
| Max Storage | 45 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,100 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | CO02089 |
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
ARAPAHOE LAKE NO. 1 ASSOCIATION
Private
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High Hazard 32 ftFrequently Asked Questions
What is the hazard classification of Arapahoe Lake?
Arapahoe Lake 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 Arapahoe Lake?
Arapahoe Lake is owned by ARAPAHOE LAKE NO. 1 ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Arapahoe Lake built?
Arapahoe Lake was completed in 1974, making it 52 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 Arapahoe Lake?
Arapahoe Lake serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Arapahoe Lake?
Arapahoe Lake 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 Arapahoe Lake last inspected?
Arapahoe Lake was last inspected on April 11, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.