Frd No 20 Reservoir Report

Last Updated: December 6, 2025

Frd No 20, also known as Wakarusa Watershed Dist 35 Frd 20, is a flood risk reduction structure located in Shawnee, Kansas.


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Summary

Owned by the local government and regulated by the Kansas Department of Agriculture, this dam was completed in 1978 by the USDA NRCS. Standing at a height of 40 feet with a hydraulic height of 37 feet, this buttress dam spans 895 feet and has a storage capacity of 409 acre-feet.

The primary purpose of Frd No 20 is flood risk reduction, serving to protect the surrounding area from potential flooding events. With a low hazard potential and a condition assessment that is currently not rated, this structure plays a crucial role in managing water resources in the region. Although the dam has not been inspected recently, it is designed to meet regulatory standards and is equipped with outlet gates to control water flow.

Despite its age, Frd No 20 continues to function effectively in reducing flood risks and safeguarding the community. As climate change brings about more extreme weather events, structures like Frd No 20 become increasingly important in mitigating the impacts of flooding and ensuring the resilience of water resources in the area. With its history of successful flood risk reduction and ongoing regulatory oversight, Frd No 20 remains a vital asset in the region's water management infrastructure.

Year Completed

1978

Dam Length

895

Dam Height

40

River Or Stream

WAKARUSA RIVER-TR

Hydraulic Height

37

Nid Storage

409

Structural Height

40

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

40
       
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.
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