Long Branch 2 Reservoir Report
Nearby: Long Branch 3 Long Branch 71
Last Updated: December 6, 2025
Long Branch 2 is a vital water resource infrastructure located in Johnson, Nebraska, designed primarily for flood risk reduction.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1980 by ASSOCIATE ENGINEERS INC. HOTTOVY DIVISION and USDA-NRCS, this earth-type dam stands at a height of 35 feet and spans 1,225 feet, with a storage capacity of 665 acre-feet. It plays a crucial role in safeguarding the area from potential flooding events, with a maximum discharge capacity of 493 cubic feet per second.
Managed by the Nebraska Department of Natural Resources, Long Branch 2 undergoes regular inspections, with the last assessment conducted in May 2016, revealing a satisfactory condition. The dam is situated on the TR-LONG BRANCH river/stream, within the jurisdiction of the NE DNR. Its location and design make it a significant asset in the region's water resource management efforts, ensuring the safety and security of the surrounding communities.
Overall, Long Branch 2 serves as a critical piece of infrastructure for flood risk mitigation in Nebraska, exemplifying the collaborative efforts between local government agencies and engineering firms to protect against potential water-related hazards. With its strategic location and efficient design, this dam stands as a testament to the importance of proactive water resource management in the face of changing climate patterns and increasing water-related challenges.
Year Completed |
1980 |
Dam Length |
1225 |
Dam Height |
35 |
River Or Stream |
TR-LONG BRANCH |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
34 |
Drainage Area |
2.2 |
Nid Storage |
665 |
Structural Height |
37 |
Foundations |
Soil |
Nid Height |
37 |
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 |
Nishnabotna River Above Hamburg
|
1350cfs |
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 2