Long Branch N-6 Reservoir Report
Nearby: Long Branch 70 Long Branch N-5
Last Updated: December 6, 2025
Long Branch N-6 is a local government-owned earth dam located in Nemaha, Nebraska, designed by the USDA NRCS and regulated by the Nebraska Department of Natural Resources.
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Summary
Completed in 1984, this flood risk reduction structure stands at 36 feet in height with a hydraulic height of 32 feet, providing a storage capacity of 310 acre-feet and normal storage of 57 acre-feet. The dam spans 820 feet in length and covers a surface area of 11 acres, serving the Long Branch Creek watershed with a drainage area of 0.9 square miles.
With a low hazard potential and satisfactory condition assessment as of May 2016, Long Branch N-6 plays a crucial role in mitigating flood risks in the area while ensuring the safety of nearby residents and infrastructure. Managed by the Natural Resources Conservation Service, this structure undergoes inspections every 5 years to maintain its operational integrity. While the dam's emergency action plan status and risk assessment details are currently unspecified, its strategic location and design contribute to the overall water resource management efforts in the region, enhancing resilience to climate-related challenges.
As part of the flood risk reduction infrastructure network in Nebraska, Long Branch N-6 serves as a vital component in the state's water resource management strategy. With its earth dam construction and stone core design, this structure not only provides storage capacity and flood control measures but also supports the sustainable use of water resources in the Long Branch Creek watershed. Collaborative efforts between local government agencies, the NRCS, and the Nebraska DNR ensure the ongoing maintenance and enforcement of regulatory standards, highlighting the importance of proactive measures in safeguarding water quality and quantity for future generations.
Year Completed |
1984 |
Dam Length |
820 |
Dam Height |
36 |
River Or Stream |
TR-LONG BRANCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
32 |
Drainage Area |
0.9 |
Nid Storage |
310 |
Structural Height |
36 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
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 |
Big Nemaha River At Falls City
|
310cfs |
Missouri River At Nebraska City
|
22500cfs |
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 N-6