Spence
Key Takeaway
Spence is classified as significant hazard in Colorado. It was completed in 1965 and is 61 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 44 ft (taller than 84.9% in CO) |
| Dam Length | 915 ft |
| Dam Type | Earth |
| Max Storage | 617 acre-ft |
| Normal Storage | 425 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 4,243 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | CO01056 |
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
ALPINE LAKES RANCH DITCH CO. (SMITH, RON)
Private
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Significant Hazard 68 ftFrequently Asked Questions
What is the hazard classification of Spence?
Spence 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 Spence?
Spence is owned by ALPINE LAKES RANCH DITCH CO. (SMITH, RON) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Spence built?
Spence 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 Spence?
Spence serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, 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 Spence?
Spence has a dam height of 44 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 Spence last inspected?
Spence was last inspected on September 27, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.