South Branch 45
Key Takeaway
South Branch 45 is classified as low hazard in Nebraska. It was completed in 1990 and is 36 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 34 ft (taller than 79.7% in NE) |
| Dam Length | 1,150 ft |
| Dam Type | Earth |
| Max Storage | 524 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 461 cfs |
| Year Completed | 1990 (36 years old) |
| NID ID | NE02351 |
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
Nemaha Natural Resources District
Local Government
Nearby Dams
Little Nemaha 10
Otoe, NE
Low Hazard 41 ftSouth Branch 12
Johnson, NE
Low Hazard 29 ftSouth Branch 3-3
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Low Hazard 29 ftSouth Branch 8
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Low Hazard 41 ftSouth Branch 13
Johnson, NE
Low Hazard 26 ftSouth Branch 11
Otoe, NE
Low Hazard 43 ftUpper Big Nemaha 1-B41
Johnson, NE
Significant Hazard 43 ftSouth Branch 7
Otoe, NE
Low Hazard 48 ftFrequently Asked Questions
What is the hazard classification of South Branch 45?
South Branch 45 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 South Branch 45?
South Branch 45 is owned by Nemaha Natural Resources District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was South Branch 45 built?
South Branch 45 was completed in 1990, making it 36 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 South Branch 45?
South Branch 45 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 South Branch 45?
South Branch 45 has a dam height of 34 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 South Branch 45 last inspected?
South Branch 45 was last inspected on June 16, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.