South Fork 2-6 Reservoir Report

Last Updated: December 13, 2025

South Fork 2-6 is a vital water resource structure located in Pawnee, Nebraska, designed by the USDA NRCS and regulated by the NE DNR.


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Summary

Completed in 1978, this earth dam stands at a height of 38 feet with a hydraulic height of 36 feet, serving the primary purpose of flood risk reduction. With a normal storage capacity of 48 acre-feet and a maximum discharge rate of 415 cubic feet per second, South Fork 2-6 plays a crucial role in managing the water resources of the TR-LORES BR S FK BIG NEMAHA R.

This structure covers a surface area of 6 acres and has a drainage area of 0.2 square miles, providing essential protection to the surrounding areas from potential flooding risks. With a low hazard potential and satisfactory condition assessment, South Fork 2-6 is well-maintained and inspected regularly to ensure its effectiveness in flood risk reduction. The dam is equipped with necessary safety measures, although further details on emergency action plans and risk management strategies are yet to be fully documented.

Managed by the Omaha District and owned by the local government, South Fork 2-6 stands as a testament to effective water resource management in Nebraska. Its strategic location and design make it a key player in safeguarding the region from potential flooding events, highlighting the importance of sustainable infrastructure for climate resilience.

Year Completed

1978

Dam Length

989

Dam Height

38

River Or Stream

TR-LORES BR S FK BIG NEMAHA R

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

36

Drainage Area

0.2

Nid Storage

102

Structural Height

39

Hazard Potential

Low

Foundations

Soil

Nid Height

39
       
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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.