Long Branch N-1 Reservoir Report
Nearby: Long Branch 1-1 Long Branch 7
Last Updated: December 12, 2025
Long Branch N-1 is a crucial water resource structure located in Nemaha, Nebraska, designed by the USDA NRCS and completed in 1984.
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Summary
This earth dam stands at a height of 29 feet with a hydraulic height of 27 feet, providing flood risk reduction along the TR-LONG BRANCH CREEK. With a storage capacity of 101 acre-feet, the dam serves a vital role in managing water flow and protecting the surrounding area from potential hazards.
Managed by the Nebraska Department of Natural Resources, Long Branch N-1 is subject to state regulation, inspection, and enforcement to ensure its structural integrity and overall performance. Despite its low hazard potential, the dam is regularly assessed and deemed to be in satisfactory condition as of the last inspection in March 2017. The dam's primary purpose extends beyond flood risk reduction, highlighting its significance in water resource management and climate resilience efforts in the region.
With its stone core and soil foundation, Long Branch N-1 spans a length of 595 feet and covers a surface area of 5 acres, serving a drainage area of 0.6 square miles. The dam's design and construction by the Natural Resources Conservation Service reflect a commitment to effective water infrastructure that supports environmental sustainability and community safety. As a focal point for water resource and climate enthusiasts, Long Branch N-1 exemplifies the intersection of engineering expertise and environmental stewardship in safeguarding water resources for future generations.
Year Completed |
1984 |
Dam Length |
595 |
Dam Height |
29 |
River Or Stream |
TR-LONG BRANCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
27 |
Drainage Area |
0.6 |
Nid Storage |
101 |
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
|
25000cfs |
Big Nemaha River At Falls City
|
310cfs |
Nishnabotna River Above Hamburg
|
639cfs |
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-1