Wilson Creek 8-H Reservoir Report

Last Updated: December 7, 2025

Wilson Creek 8-H is a vital flood risk reduction structure located in Otoe, Nebraska, along the TR-N FK Little Nemaha River.


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Summary

Built in 1968 by the USDA NRCS, this earth dam stands at a height of 33.7 feet and has a structural height of 43.2 feet, with a primary purpose of flood risk reduction. With a storage capacity of 697.4 acre-feet and a normal storage level of 108 acre-feet, Wilson Creek 8-H covers a surface area of 21 acres and serves a drainage area of 1.16 square miles.

Managed by the local government and regulated by the NE DNR, Wilson Creek 8-H has a high hazard potential but is currently in satisfactory condition. Inspected annually, the dam has a satisfactory condition assessment as of March 2020. While the dam has not been modified in recent years, it is equipped to handle a maximum discharge of 3,601 cubic feet per second, ensuring the safety of surrounding areas in the event of heavy rainfall or flooding. With a solid foundation in soil and core made of stone, Wilson Creek 8-H exemplifies the intersection of water resource management and climate resilience in Nebraska.

Year Completed

1968

Dam Length

1126

Dam Height

33.7

River Or Stream

TR-N FK LITTLE NEMAHA RIVER

Primary Dam Type

Earth

Surface Area

21

Hydraulic Height

33.7

Drainage Area

1.16

Nid Storage

697.4

Structural Height

43.2

Hazard Potential

High

Foundations

Soil

Nid Height

43
       
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.