Mahon Reservoir
Key Takeaway
Mahon Reservoir is classified as low hazard in Oregon. It was completed in 1904 and is 122 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 25 ft (taller than 43.9% in OR) |
| Dam Length | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 2.0K acre-ft |
| Normal Storage | 3.5K acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 30 sq mi |
| Max Discharge | 90 cfs |
| Year Completed | 1904 (122 years old) |
| NID ID | OR00603 |
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
TREE TOP RANCHES, LTD.
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mahon Reservoir?
Mahon Reservoir 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 Mahon Reservoir?
Mahon Reservoir is owned by TREE TOP RANCHES, LTD. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mahon Reservoir built?
Mahon Reservoir was completed in 1904, making it 122 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 Mahon Reservoir?
Mahon Reservoir 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 Mahon Reservoir?
Mahon Reservoir has a dam height of 25 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 Mahon Reservoir last inspected?
Mahon Reservoir was last inspected on August 15, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.