Kirwin Reservoir Report

Last Updated: December 13, 2025

Kirwin Dam, located in Phillips County, Kansas, along the North Fork Solomon River, is a federal flood risk reduction structure managed by the Bureau of Reclamation.


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Summary

Completed in 1954, this earth dam stands at 169 feet in height and spans over 12,600 feet in length, with a storage capacity of over 500,000 acre-feet. The dam serves multiple purposes, including flood risk reduction and irrigation, making it a vital resource for the region.

With a high hazard potential and a moderate risk assessment, Kirwin Dam plays a crucial role in managing water resources and mitigating potential disasters in the area. While the condition assessment is not available, regular inspections and emergency action plans are in place to ensure the safety and integrity of the structure. With Roger W. Marshall representing the district, the dam continues to be a key asset in safeguarding the community and surrounding areas from the impacts of extreme weather events and flooding.

Year Completed

1954

Dam Length

12646

Dam Height

169

River Or Stream

NORTH FORK SOLOMON RIVER

Primary Dam Type

Earth

Surface Area

10640

Hydraulic Height

111

Drainage Area

1373

Nid Storage

513020

Structural Height

169

Hazard Potential

High

Foundations

Rock

Nid Height

169
       
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.