Anderson #1
Key Takeaway
Anderson #1 is classified as significant hazard in Colorado. It was completed in 1963 and is 63 years old. Its primary use is water supply. 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 | 970 ft |
| Dam Type | Earth |
| Max Storage | 821 acre-ft |
| Normal Storage | 467 acre-ft |
| Surface Area | 59 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 772 cfs |
| Year Completed | 1963 (63 years old) |
| NID ID | CO00070 |
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
CITY OF GRAND JUNCTION
Local Government
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Anderson #1?
Anderson #1 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 Anderson #1?
Anderson #1 is owned by CITY OF GRAND JUNCTION (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Anderson #1 built?
Anderson #1 was completed in 1963, making it 63 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 Anderson #1?
Anderson #1 serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Anderson #1?
Anderson #1 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 Anderson #1 last inspected?
Anderson #1 was last inspected on October 5, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.