Mcmahon
Key Takeaway
Mcmahon is classified as low hazard in California. It was completed in 1957 and is 69 years old. Its primary use is water supply.
Physical Details
| Dam Height | 52 ft (taller than 61.5% in CA) |
| Dam Length | 705 ft |
| Dam Type | Earth |
| Max Storage | 520 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 18 sq mi |
| Year Completed | 1957 (69 years old) |
| NID ID | CA00701 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Private Entity
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mcmahon?
Mcmahon is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mcmahon?
Mcmahon is owned by Private Entity (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mcmahon built?
Mcmahon was completed in 1957, making it 69 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?
Mcmahon serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mcmahon?
Mcmahon has a dam height of 52 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 last inspected?
Mcmahon was last inspected on June 28, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.