Lake Roslyn
Key Takeaway
Lake Roslyn is classified as significant hazard in Colorado. It was completed in 1938 and is 88 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 35 ft (taller than 75.7% in CO) |
| Dam Length | 880 ft |
| Dam Type | Earth |
| Max Storage | 425 acre-ft |
| Normal Storage | 262 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 25 sq mi |
| Max Discharge | 510 cfs |
| Year Completed | 1938 (88 years old) |
| Year Modified | 2009 |
| NID ID | CO00995 |
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
DUNLAP, DAVID J.
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lake Roslyn?
Lake Roslyn 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 Lake Roslyn?
Lake Roslyn is owned by DUNLAP, DAVID J. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Roslyn built?
Lake Roslyn was completed in 1938, making it 88 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 Lake Roslyn?
Lake Roslyn serves the following purposes: Recreation, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Roslyn?
Lake Roslyn has a dam height of 35 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 Lake Roslyn last inspected?
Lake Roslyn was last inspected on October 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.