Eureka Reservoir Dam
Key Takeaway
Eureka Reservoir Dam is classified as high hazard in Montana. It was completed in 1936 and is 90 years old. Its primary use is irrigation. 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 | 32 ft (taller than 90.8% in MT) |
| Dam Length | 1,700 ft |
| Dam Type | Earth |
| Max Storage | 6.8K acre-ft |
| Normal Storage | 5.5K acre-ft |
| Surface Area | 390 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 4,400 cfs |
| Year Completed | 1936 (90 years old) |
| Year Modified | 2013 |
| NID ID | MT01354 |
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
TETON COOP. CANAL CO
Private
Nearby Dams
Eureka Reservoir West Dike
Teton, MT
High Hazard 12 ftDecuman
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Low Hazard 15 ftFarmers Coop Canal Co
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Low Hazard 34 ftHarvey Lake
Teton, MT
Significant Hazard 26 ftDougcliff Reservoir
Teton, MT
Low Hazard 20 ftWolf Coulee Dam
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Significant Hazard 38 ftBynum Reservoir Dam
Teton, MT
High Hazard 60 ftDeminish
Teton, MT
Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Eureka Reservoir Dam?
Eureka Reservoir Dam 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 Eureka Reservoir Dam?
Eureka Reservoir Dam is owned by TETON COOP. CANAL CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Eureka Reservoir Dam built?
Eureka Reservoir Dam was completed in 1936, making it 90 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 Eureka Reservoir Dam?
Eureka Reservoir Dam 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 Eureka Reservoir Dam?
Eureka Reservoir Dam has a dam height of 32 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 Eureka Reservoir Dam last inspected?
Eureka Reservoir Dam was last inspected on April 14, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.