Frd No 31 Reservoir Report

Last Updated: December 6, 2025

Frd No 31, also known as Wakarusa Watershed Dam 31, is located in Eudora, Kansas, and is owned by the Local Government.


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Summary

This earth dam, designed by USDA NRCS, was completed in 1971 with a primary purpose of flood risk reduction. Standing at a height of 40.3 feet and a length of 1048 feet, the dam has a normal storage capacity of 86 acre-feet and serves the Wakarusa River watershed.

Managed by the Kansas Department of Agriculture, this dam is state-regulated and undergoes regular inspections to ensure its safety and functionality. The dam has a high hazard potential and is rated in fair condition, with a moderate risk assessment score of 3. In case of emergencies, there are currently no Emergency Action Plans (EAP) prepared, but the dam is equipped with an uncontrolled spillway with a width of 70 feet. With a drainage area of 1.45 square miles, Frd No 31 plays a crucial role in mitigating flood risks in the region and protecting the local community from potential water-related disasters.

Water resource and climate enthusiasts will find Frd No 31 to be a significant infrastructure in the Wakarusa River watershed, serving as a vital flood risk reduction measure in Douglas County, Kansas. With its moderate risk assessment and fair condition, ongoing inspections and maintenance are essential to ensure the dam's continued effectiveness. As part of the state-regulated water infrastructure, Frd No 31 highlights the importance of proactive monitoring and management of dams to safeguard communities and water resources from the impacts of flooding and water-related emergencies.

Year Completed

1971

Dam Length

1048

Dam Height

40.3

River Or Stream

WAKARUSA RIVER-TR

Primary Dam Type

Earth

Surface Area

13.6

Hydraulic Height

40

Drainage Area

1.45

Nid Storage

720

Structural Height

51

Outlet Gates

None

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

51
       
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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