Frd No Gs 4 Reservoir Report

Last Updated: December 13, 2025

Frd No Gs 4, also known as Walnut Creek Watershed Dam Gs 4, is a local government-owned earth dam located in Hamlin, Kansas.


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Summary

Built in 1965 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction in the Terrapin Creek-TR watershed. With a structural height of 31 feet and a hydraulic height of 26 feet, Frd No Gs 4 has a storage capacity of 142 acre-feet and a normal storage level of 21 acre-feet.

The dam spans 880 feet in length and covers a surface area of 5.27 acres, with a drainage area of 0.78 square miles. It features an uncontrolled spillway with a width of 75 feet and a maximum discharge capacity of 370 cubic feet per second. Despite its low hazard potential and moderate risk assessment rating of 3, Frd No Gs 4 has not been officially rated for its condition and maintenance status. The dam does not have outlet gates and has not undergone recent inspections or emergency action plan updates.

Overall, Frd No Gs 4 plays a crucial role in mitigating flood risks in the Walnut Creek watershed. As water resource and climate enthusiasts, it is essential to monitor and ensure the proper maintenance and inspection of this dam to uphold its effectiveness in protecting the surrounding communities from potential flooding events.

Year Completed

1965

Dam Length

880

Dam Height

31

River Or Stream

TERRAPIN CREEK-TR

Primary Dam Type

Earth

Surface Area

5.27

Hydraulic Height

26

Drainage Area

0.78

Nid Storage

142

Structural Height

31

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

31
       
Seasonal Comparison

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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.