Annex #8
Key Takeaway
Annex #8 is classified as significant hazard in Colorado. It was completed in 1903 and is 123 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 26 ft (taller than 56.3% in CO) |
| Dam Length | 1,960 ft |
| Dam Type | Earth |
| Max Storage | 4.4K acre-ft |
| Normal Storage | 3.7K acre-ft |
| Surface Area | 179 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 10 cfs |
| Year Completed | 1903 (123 years old) |
| NID ID | CO01155 |
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
WRCC, INC. (NELSON, KIMBERLY)
Private
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High Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Annex #8?
Annex #8 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 Annex #8?
Annex #8 is owned by WRCC, INC. (NELSON, KIMBERLY) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Annex #8 built?
Annex #8 was completed in 1903, making it 123 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 Annex #8?
Annex #8 serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Annex #8?
Annex #8 has a dam height of 26 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 Annex #8 last inspected?
Annex #8 was last inspected on June 17, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.