Cottonwood Creek Middle
Key Takeaway
Cottonwood Creek Middle is classified as significant hazard in Idaho. It was completed in 1961 and is 65 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 20 ft (taller than 28% in ID) |
| Dam Length | 1,210 ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 3,540 cfs |
| Year Completed | 1961 (65 years old) |
| Year Modified | 1997 |
| NID ID | ID00567 |
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
Local Government
Nearby Dams
Cottonwood Creek Upper
Ada, ID
Significant Hazard 18 ftCottonwood Creek Lower
Ada, ID
Significant Hazard 15 ftCrane Gulch East Dam
Ada, ID
Significant Hazard 60 ftStewart Gulch Main Fork
Ada, ID
Significant Hazard 76 ftCrane Gulch Main Fork
Ada, ID
Significant Hazard 46 ftStewart Gulch North Fork
Ada, ID
Significant Hazard 38 ftBarber
Ada, ID
Significant Hazard 26 ftBoise River Diversion
Ada, ID
High Hazard 57 ftFrequently Asked Questions
What is the hazard classification of Cottonwood Creek Middle?
Cottonwood Creek Middle 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 Cottonwood Creek Middle?
Cottonwood Creek Middle is owned by information not available (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cottonwood Creek Middle built?
Cottonwood Creek Middle was completed in 1961, making it 65 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 Cottonwood Creek Middle?
Cottonwood Creek Middle serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Cottonwood Creek Middle?
Cottonwood Creek Middle 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.
When was Cottonwood Creek Middle last inspected?
Cottonwood Creek Middle was last inspected on September 11, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.