Mcmahon #2
Key Takeaway
Mcmahon #2 is classified as significant hazard in Colorado. It was completed in 1913 and is 113 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 48 ft (taller than 87.4% in CO) |
| Dam Length | 987 ft |
| Dam Type | Earth |
| Max Storage | 4.6K acre-ft |
| Normal Storage | 3.5K acre-ft |
| Surface Area | 196 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 1,817 cfs |
| Year Completed | 1913 (113 years old) |
| NID ID | CO00703 |
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
MCMAHON RESERVOIR CO. (PINTO VALLEY RANCH)
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mcmahon #2?
Mcmahon #2 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 Mcmahon #2?
Mcmahon #2 is owned by MCMAHON RESERVOIR CO. (PINTO VALLEY RANCH) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mcmahon #2 built?
Mcmahon #2 was completed in 1913, making it 113 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 Mcmahon #2?
Mcmahon #2 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 Mcmahon #2?
Mcmahon #2 has a dam height of 48 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 Mcmahon #2 last inspected?
Mcmahon #2 was last inspected on June 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.