Shay Dam
Key Takeaway
Shay Dam is classified as significant hazard in Montana. It was completed in 1915 and is 111 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 15 ft (taller than 18.8% in MT) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 31 acre-ft |
| Normal Storage | 16 acre-ft |
| Year Completed | 1915 (111 years old) |
| NID ID | MT00400 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
HELLINGER BROS
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Shay Dam?
Shay Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Shay Dam?
Shay Dam is owned by HELLINGER BROS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Shay Dam built?
Shay Dam was completed in 1915, making it 111 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 Shay Dam?
Shay 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 Shay Dam?
Shay Dam has a dam height of 15 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.