Long Branch 3 Reservoir Report
Nearby: Long Branch 2 Long Branch 4
Last Updated: December 6, 2025
Located in Johnson County, Nebraska, Long Branch 3 is a crucial flood risk reduction structure designed by ASSOCIATE ENGINEERS INC.
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Summary
HOTTOVY DIVISION and USDA-NRCS in 1980. This earth dam, standing at 32 feet tall with a hydraulic height of 29 feet, serves the primary purpose of flood risk reduction for the TR-LONG BRANCH river or stream. With a storage capacity of 270 acre-feet and a drainage area of 1.2 square miles, Long Branch 3 plays a pivotal role in safeguarding the surrounding area from potential flooding events.
Managed by the local government and regulated by the Nebraska Department of Natural Resources, Long Branch 3 has been deemed to be in satisfactory condition as of the last inspection in May 2016. With a normal storage capacity of 70 acre-feet and a maximum discharge of 430 cubic feet per second, this structure covers a surface area of 13 acres and spans a length of 817 feet. Although no spillway type or width is specified, the dam's core consists of stone with a soil foundation, ensuring its stability and resilience in the face of varying water levels and pressures.
As part of the Omaha District under the US Army Corps of Engineers, Long Branch 3 stands as a testament to effective water resource management and climate adaptation strategies. Its strategic location, robust design, and efficient operation highlight the importance of proactive measures in mitigating flood risks and protecting communities and ecosystems in the region. For water resource and climate enthusiasts, Long Branch 3 serves as a shining example of successful collaboration between government agencies, designers, and local stakeholders in ensuring the resilience and sustainability of vital water infrastructure.
Year Completed |
1980 |
Dam Length |
817 |
Dam Height |
32 |
River Or Stream |
TR-LONG BRANCH |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
29 |
Drainage Area |
1.2 |
Nid Storage |
270 |
Structural Height |
35 |
Foundations |
Soil |
Nid Height |
35 |
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 Blue R At Barneston Nebr
|
131cfs |
Big Nemaha River At Falls City
|
310cfs |
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 3