Frd No 20 Reservoir Report

Last Updated: December 13, 2025

Frd No 20, also known as Little Delaware Mission Cr WS Dam 20, is a local government-owned structure located in Horton, Kansas.


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Summary

Built in 1969 by the USDA NRCS, this earth dam stands at a height of 31 feet and serves the primary purpose of flood risk reduction along Otter Creek. With a storage capacity of 337.73 acre-feet and a normal storage level of 48 acre-feet, Frd No 20 covers a surface area of 9.05 acres and has a drainage area of 0.56 square miles.

Managed by the Kansas Department of Agriculture, Frd No 20 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam features an uncontrolled spillway with a width of 80 feet and has not been modified since its completion. While the risk assessment for Frd No 20 is moderate, there is no Emergency Action Plan (EAP) in place, and the structure has not been inspected recently. Despite these challenges, the dam continues to play a crucial role in mitigating flood risks in the area and protecting downstream communities.

Year Completed

1969

Dam Length

825

Dam Height

31

River Or Stream

OTTER CREEK-TR

Primary Dam Type

Earth

Surface Area

9.05

Hydraulic Height

28

Drainage Area

0.56

Nid Storage

337.73

Structural Height

31

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

31
       
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.