No. Decker Flood Control Reservoir No. 2
Key Takeaway
No. Decker Flood Control Reservoir No. 2 is classified as significant hazard in Montana. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 52 ft (taller than 97% in MT) |
| Dam Type | Earth |
| Max Storage | 287 acre-ft |
| Normal Storage | 288 acre-ft |
| Drainage Area | 14 sq mi |
| Max Discharge | 1,243 cfs |
| NID ID | MT03976 |
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
DECKER COAL COMPANY
Private
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Low Hazard 30 ftFrequently Asked Questions
What is the hazard classification of No. Decker Flood Control Reservoir No. 2?
No. Decker Flood Control Reservoir No. 2 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 No. Decker Flood Control Reservoir No. 2?
No. Decker Flood Control Reservoir No. 2 is owned by DECKER COAL COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of No. Decker Flood Control Reservoir No. 2?
No. Decker Flood Control Reservoir No. 2 serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is No. Decker Flood Control Reservoir No. 2?
No. Decker Flood Control Reservoir No. 2 has a dam height of 52 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 No. Decker Flood Control Reservoir No. 2 last inspected?
No. Decker Flood Control Reservoir No. 2 was last inspected on June 24, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.