John Redmond Dam Reservoir Report

Last Updated: December 14, 2025

John Redmond Dam, located in Coffey County, Kansas, is a gravity dam built in 1964 by the US Army Corps of Engineers to primarily reduce flood risk along the Grand Neosho River.


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Summary

With a structural height of 87 feet and a length of 21,790 feet, the dam has a storage capacity of 626,007 acre-feet and covers a surface area of 9,671 acres. It serves multiple purposes, including flood risk reduction, recreation, and water supply for the region.

Despite being classified as a high hazard potential dam, the US Army Corps of Engineers actively manages the risks associated with the dam by continuously monitoring its condition, conducting regular inspections, and engaging with local emergency managers to ensure preparedness for any potential emergencies. The dam has a controlled spillway with a width of 560 feet to manage water levels during peak discharge events. Additionally, the dam's emergency action plan is regularly updated, and measures are in place to address potential issues that may arise during severe weather events or high water levels.

Although dams cannot eliminate all flood risks, the US Army Corps of Engineers remains dedicated to addressing and mitigating potential hazards associated with the John Redmond Dam. By implementing risk management measures, conducting routine maintenance, and collaborating with local stakeholders, the dam continues to play a crucial role in protecting the surrounding communities and ensuring the safety of water resources in the area.

Year Completed

1964

Dam Length

21790

Dam Height

87

River Or Stream

GRAND NEOSHO RIVER

Primary Dam Type

Gravity

Surface Area

9671

Hydraulic Height

80

Drainage Area

3015

Nid Storage

626007

Structural Height

87

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

87
       
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.