Frd No S-1 Reservoir Report

Last Updated: December 5, 2025

Located in the Fall River Watershed in Kansas, Frd No S-1, also known as Fall River Watershed Dam S-1, is a critical structure designed by USDA NRCS to mitigate flood risks.


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Summary

This earth dam, standing at a height of 61 feet with a hydraulic height of 58 feet, was completed in 1965 and serves the primary purpose of flood risk reduction. With a storage capacity of 6830 acre-feet and a surface area of 64.29 acres, Frd No S-1 plays a crucial role in managing the flow of Spring Creek and protecting the surrounding area from potential inundation.

Owned and regulated by the local government in Greenwood, Kansas, Frd No S-1 is subject to inspections, permitting, and enforcement by the Kansas Dept. of Agriculture. The dam has a low hazard potential and its condition is currently not rated. Despite its moderate risk assessment, the structure has not been modified in recent years and does not have an emergency action plan in place. With a controlled spillway width of 80 feet and no outlet gates, Frd No S-1 continues to provide essential flood protection for the community while maintaining a moderate risk level that warrants ongoing monitoring and management to ensure its continued effectiveness.

Year Completed

1965

Dam Length

1635

Dam Height

61

River Or Stream

SPRING CREEK

Primary Dam Type

Earth

Surface Area

64.29

Hydraulic Height

58

Drainage Area

17.48

Nid Storage

6830

Structural Height

61

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

61
       
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.