Mompano
Key Takeaway
Mompano is classified as high hazard in Oregon. It was completed in 1971 and is 55 years old. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 39 ft (taller than 75.8% in OR) |
| Dam Length | 720 ft |
| Dam Type | Earth |
| Max Storage | 780 acre-ft |
| Normal Storage | 780 acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 13 sq mi |
| Max Discharge | 1,400 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | OR00500 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BEAVERLAKE OWNERS ASSOC
Private
Nearby Dams
Briscoe Reservoir
Clackamas, OR
Low Hazard 25 ftHaberlach Dam
Clackamas, OR
Significant Hazard 22 ftDay Reservoir
Clackamas, OR
Significant Hazard 26 ftPorter Cc Reservoir (Clackamas)
Clackamas, OR
Low Hazard 21 ftWillamette Falls Locks
Clackamas, OR
High HazardCrown Zellerbach (Lagoon)
Clackamas, OR
Low Hazard 15 ftMitchell - Stanley Reservoir
Clackamas, OR
Low Hazard 25 ftThree Creeks Natural Area
Clackamas, OR
Significant Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Mompano?
Mompano is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mompano?
Mompano is owned by BEAVERLAKE OWNERS ASSOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mompano built?
Mompano was completed in 1971, making it 55 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 Mompano?
Mompano serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mompano?
Mompano has a dam height of 39 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 Mompano last inspected?
Mompano was last inspected on November 19, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.