Upper Stillwater
Key Takeaway
Upper Stillwater is classified as low hazard in Colorado. It was completed in 1965 and is 61 years old. Its primary use is recreation.
Physical Details
| Dam Height | 28 ft (taller than 61.6% in CO) |
| Dam Length | 275 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 620 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 22 sq mi |
| Max Discharge | 2,150 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | CO01031 |
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
COLORADO PARKS AND WILDLIFE
State Government
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Low Hazard 51 ftFrequently Asked Questions
What is the hazard classification of Upper Stillwater?
Upper Stillwater 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 Upper Stillwater?
Upper Stillwater is owned by COLORADO PARKS AND WILDLIFE (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Stillwater built?
Upper Stillwater was completed in 1965, making it 61 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 Upper Stillwater?
Upper Stillwater serves the following purposes: Recreation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Stillwater?
Upper Stillwater has a dam height of 28 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 Upper Stillwater last inspected?
Upper Stillwater was last inspected on August 22, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.