Wilson Creek 1-N Reservoir Report

Last Updated: December 6, 2025

Wilson Creek 1-N is a vital earth dam located in Otoe, Nebraska, designed by USDA NRCS to mitigate flood risks and protect the surrounding area.


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Summary

Completed in 1969, this structure stands at a height of 39 feet and spans 863 feet in length, providing essential flood risk reduction for the TR-N FK Little Nemaha River. With a storage capacity of 424 acre-feet and a drainage area of 1.4 square miles, Wilson Creek 1-N plays a crucial role in managing water flow and protecting the community from potential inundation.

Managed by the Nebraska Department of Natural Resources, Wilson Creek 1-N has a low hazard potential and is deemed to be in satisfactory condition following its last inspection in June 2020. The dam's primary purpose of flood risk reduction aligns with its design and construction by the Natural Resources Conservation Service, ensuring the safety and well-being of residents in the vicinity. With a maximum discharge capacity of 1527 cubic feet per second, this structure is equipped to handle significant water volumes during periods of heightened flood risk.

Located in a strategic location within the Kansas City District, Wilson Creek 1-N serves as a critical infrastructure for water resource management in the region. Its effective design and maintenance underscore the importance of proactive measures in safeguarding against climate-related challenges, highlighting the collaboration between local government agencies and federal partners to ensure the resilience of water resources in Nebraska.

Year Completed

1969

Dam Length

863

Dam Height

35

River Or Stream

TR-N FK LITTLE NEMAHA RIVER

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

35

Drainage Area

1.4

Nid Storage

424

Structural Height

39

Hazard Potential

Low

Foundations

Soil

Nid Height

39
       
Seasonal Comparison

Weather Forecast

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.