South Fork 11-1 Reservoir Report
Nearby: South Fork 4-2 South Fork 2-A
Last Updated: December 13, 2025
South Fork 11-1 is a local government-owned earth dam located in Pawnee, Nebraska, designed by the USDA NRCS and regulated by the Nebraska Department of Natural Resources.
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Summary
Completed in 1978, this dam serves multiple purposes, including flood risk reduction, and has a height of 30 feet and a length of 727 feet. With a storage capacity of 72 acre-feet and a drainage area of 0.2 square miles, South Fork 11-1 plays a crucial role in water resource management in the area.
Despite its low hazard potential and satisfactory condition assessment, South Fork 11-1 undergoes inspection every five years to ensure its structural integrity and safety. The dam's emergency action plan status and risk assessment information are currently unavailable, indicating a potential area for improvement in the future. With a maximum discharge of 174 cubic feet per second, this dam is designed to manage water flow from the TR-LORES BR S FK BIG NEMAHA R river or stream, demonstrating its importance in mitigating flood risks and protecting the surrounding community in Dubois, Nebraska.
Overall, South Fork 11-1 stands as a vital infrastructure asset in Pawnee County, Nebraska, providing essential flood protection and water management services. With its key role in the local water resource system and regulated status, this dam showcases the collaborative efforts between local government agencies, the USDA NRCS, and the Nebraska Department of Natural Resources to ensure the safety and sustainability of water resources in the region.
Year Completed |
1978 |
Dam Length |
727 |
Dam Height |
30 |
River Or Stream |
TR-LORES BR S FK BIG NEMAHA R |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
30 |
Drainage Area |
0.2 |
Nid Storage |
72 |
Structural Height |
32 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
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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.
South Fork 11-1