Allison 1 Cat Dam
Key Takeaway
Allison 1 Cat Dam is classified as low hazard in Nebraska. It was completed in 1983 and is 43 years old. Its primary use is debris control.
Physical Details
| Dam Height | 24 ft (taller than 42.8% in NE) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 80 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 37 cfs |
| Year Completed | 1983 (43 years old) |
| NID ID | NE01898 |
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
Upper Niobrara White Natural Resources District
Local Government
Nearby Dams
Child Dam
Sheridan, NE
Low Hazard 21 ftAllison 2 Cat Dam
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Low Hazard 20 ftGlen Forney Dam
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Low Hazard 32 ftDenby Dam
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Significant Hazard 27 ftJohnson Dam
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Low Hazard 18 ftChief Dam
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Low Hazard 26 ftWolf Creek
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Significant HazardFrequently Asked Questions
What is the hazard classification of Allison 1 Cat Dam?
Allison 1 Cat Dam 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 Allison 1 Cat Dam?
Allison 1 Cat Dam is owned by Upper Niobrara White Natural Resources District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Allison 1 Cat Dam built?
Allison 1 Cat Dam was completed in 1983, making it 43 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 Allison 1 Cat Dam?
Allison 1 Cat Dam serves the following purposes: Debris Control. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Allison 1 Cat Dam?
Allison 1 Cat Dam has a dam height of 24 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 Allison 1 Cat Dam last inspected?
Allison 1 Cat Dam was last inspected on May 20, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.