Grand Mesa #1
Key Takeaway
Grand Mesa #1 is classified as significant hazard in Colorado. It was completed in 1887 and is 139 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 43.8% in CO) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 655 acre-ft |
| Normal Storage | 559 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 240 cfs |
| Year Completed | 1887 (139 years old) |
| Year Modified | 2009 |
| NID ID | CO00826 |
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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What is the hazard classification of Grand Mesa #1?
Grand Mesa #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 Grand Mesa #1?
Grand Mesa #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 Grand Mesa #1 built?
Grand Mesa #1 was completed in 1887, making it 139 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 Grand Mesa #1?
Grand Mesa #1 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 Grand Mesa #1?
Grand Mesa #1 has a dam height of 22 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 Grand Mesa #1 last inspected?
Grand Mesa #1 was last inspected on October 13, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.