Long Branch 77 Reservoir Report
Nearby: Long Branch N-5 Long Branch 70
Last Updated: December 6, 2025
Long Branch 77, located in Richardson County, Nebraska, is a vital flood risk reduction structure managed by the local government.
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Summary
Built in 1981 by the USDA NRCS, this earth dam stands at a height of 36 feet and spans 758 feet in length along the Long Branch Creek. With a storage capacity of 202 acre-feet, it serves to protect the surrounding area from potential flooding events, boasting a low hazard potential and satisfactory condition assessment.
Managed by the Nebraska Department of Natural Resources, Long Branch 77 is subject to regular state inspections and enforcement to ensure its continued functionality and safety. The dam's primary purpose is flood risk reduction, reflecting its critical role in safeguarding the local community against potential disasters. With a drainage area of 0.8 square miles and a maximum discharge of 312 cubic feet per second, this structure plays a crucial role in managing water resources in the region.
Despite its importance, Long Branch 77 currently does not have an Emergency Action Plan in place, highlighting a potential area for improvement in emergency preparedness. With its strategic location, structural design, and state-regulated oversight, Long Branch 77 stands as a key component in water resource management and climate resilience efforts in Richardson County, Nebraska.
Year Completed |
1981 |
Dam Length |
758 |
Dam Height |
36 |
River Or Stream |
TR-LONG BRANCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
34 |
Drainage Area |
0.8 |
Nid Storage |
202 |
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 |
Tarkio River At Fairfax Mo
|
88cfs |
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 77