Sumo
Key Takeaway
Sumo is classified as low hazard in Montana. It was completed in 1934 and is 92 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 44.5% in MT) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 92 acre-ft |
| Normal Storage | 20 acre-ft |
| Year Completed | 1934 (92 years old) |
| NID ID | MT03662 |
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
STATE OF MONTANA, D.N.R.C., T.L.M.D.
State Government
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Sumo?
Sumo 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 Sumo?
Sumo is owned by STATE OF MONTANA, D.N.R.C., T.L.M.D. (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sumo built?
Sumo was completed in 1934, making it 92 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 Sumo?
Sumo serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sumo?
Sumo has a dam height of 20 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.