South Branch 58 Reservoir Report
Nearby: South Branch 11 Little Nemaha 10
Last Updated: December 5, 2025
Located in Cook, Nebraska, the South Branch 58 dam is a key player in flood risk reduction along the TR-S FK Little Nemaha River.
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Summary
Constructed in 2000 by the USDA NRCS, this earth dam stands at a height of 28 feet, with a hydraulic height of 26 feet and a structural height of 33 feet. With a storage capacity of 214 acre-feet and a drainage area of 0.8 square miles, the dam serves as a vital resource in managing water flow and mitigating potential flooding in the region.
Managed by the Nebraska Department of Natural Resources, the South Branch 58 dam boasts a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in June 2016. With a normal storage capacity of 50 acre-feet and a maximum discharge of 299 cubic feet per second, this dam plays a crucial role in protecting the surrounding community from the impacts of extreme weather events. In addition to its primary purpose of flood risk reduction, the dam also serves as a recreational area, covering 11 acres of surface area for outdoor activities.
With its strategic location and effective design, the South Branch 58 dam stands as a testament to successful collaboration between local government entities and federal agencies. As climate change continues to impact water resources and weather patterns, infrastructure like the South Branch 58 dam will play an increasingly vital role in safeguarding communities and ecosystems from the growing threats of flooding and water scarcity.
Year Completed |
2000 |
Dam Length |
700 |
Dam Height |
28 |
River Or Stream |
TR-S FK LITTLE NEMAHA RIVER |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
26 |
Drainage Area |
0.8 |
Nid Storage |
214 |
Structural Height |
33 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Salt Creek At Roca
|
5cfs |
Stevens Creek Nr. Lincoln
|
3cfs |
Missouri River At Nebraska City
|
24100cfs |
Salt Creek At Pioneers Blvd At Lincoln
|
11cfs |
Weeping Water Creek At Union
|
20cfs |
Salt Creek At Lincoln
|
77cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
South Branch 58