Long Branch 4 Reservoir Report
Nearby: Long Branch 3 Long Branch 2
Last Updated: December 6, 2025
Long Branch 4 is a vital flood risk reduction structure located in Humboldt, Nebraska, within Nemaha County.
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Summary
Constructed in 1980 by the Natural Resources Conservation Service, this earth dam stands at a height of 33 feet and spans 862 feet in length. With a storage capacity of 396 acre-feet and a drainage area of 1.3 square miles, Long Branch 4 plays a crucial role in mitigating potential flood events in the region.
Managed by the local government and regulated by the Nebraska Department of Natural Resources, Long Branch 4 has been deemed in satisfactory condition as of the last inspection in May 2019. The dam's primary purpose is flood risk reduction, with a structural height of 37 feet and a maximum discharge capacity of 433 cubic feet per second. Its location within the TR-LONG BRANCH stream system further underlines its significance in protecting the surrounding area from potential water-related disasters.
As a key component in the flood risk management infrastructure of the region, Long Branch 4 not only provides protection against potential inundation but also serves as a testament to the collaborative efforts between local and state agencies in ensuring the safety and well-being of the community. With its earth dam construction and stone core structure, this essential water resource management facility stands as a testament to the importance of proactive measures in addressing the challenges posed by climate change and fluctuating water levels in the area.
Year Completed |
1980 |
Dam Length |
862 |
Dam Height |
33 |
River Or Stream |
TR-LONG BRANCH |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
32 |
Drainage Area |
1.3 |
Nid Storage |
396 |
Structural Height |
37 |
Foundations |
Soil |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Fork Big Nemaha River At Humboldt
|
67cfs |
Little Nemaha River At Auburn
|
82cfs |
Turkey C Nr Seneca
|
15cfs |
Missouri River At Nebraska City
|
22500cfs |
Big Nemaha River At Falls City
|
310cfs |
Nishnabotna River Above Hamburg
|
1350cfs |
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.
Long Branch 4