Long Branch 1-1 Reservoir Report
Nearby: Long Branch N-1 Long Branch 7
Last Updated: December 6, 2025
Located in Nemaha, Nebraska, Long Branch 1-1 is a local government-owned earth dam designed by USDA NRCS to manage flood risk along the TR-LONG BRANCH CREEK.
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Summary
Completed in 1984, this 29-foot tall structure serves multiple purposes including flood risk reduction and has a storage capacity of 61 acre-feet. With a low hazard potential and satisfactory condition assessment, Long Branch 1-1 is regulated by the Nebraska Department of Natural Resources and undergoes inspections every five years to ensure its safety and functionality.
Managed by the Natural Resources Conservation Service, Long Branch 1-1 plays a crucial role in water resource management in the region. The dam's 600-foot length and stone core foundation make it a resilient structure capable of withstanding maximum discharges of 159 cubic feet per second. Its location in the city of HUMBOLDT underscores its significance in protecting the surrounding area from potential flooding events, highlighting its importance in climate resilience and emergency management efforts.
With a drainage area of 0.3 square miles and a normal storage capacity of 8 acre-feet, Long Branch 1-1 is a key component of the local water infrastructure, providing essential flood protection and water management services to the community. As a state-regulated and inspected structure, it exemplifies the collaboration between local government agencies and the USDA NRCS in safeguarding water resources and mitigating the impacts of climate change in Nemaha, Nebraska.
Year Completed |
1984 |
Dam Length |
600 |
Dam Height |
22 |
River Or Stream |
TR-LONG BRANCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
21 |
Drainage Area |
0.3 |
Nid Storage |
61 |
Structural Height |
29 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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 1-1