Dd No 125 Reservoir Report

Last Updated: December 5, 2025

Dd No 125, located in Neosho Rapids, Kansas, is a flood risk reduction dam that was completed in 1988 by Miles Engineering.


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Summary

The dam stands at a height of 24 feet and stretches 890 feet in length, with a storage capacity of 212.28 acre-feet. It serves the primary purpose of flood risk reduction, with a low hazard potential and a moderate risk assessment rating.

Managed by the Kansas Department of Agriculture, Dd No 125 is regulated and inspected by state authorities to ensure its structural integrity and effectiveness in flood control. The dam is situated on Allen Creek-TR and is designed as an earth dam with buttress core types. Despite its uncontrolled spillway type, the dam has a maximum discharge capacity of 630 cubic feet per second and covers a drainage area of 0.52 square miles.

Water resource and climate enthusiasts can appreciate the importance of Dd No 125 in mitigating flood risks in Lyon County, Kansas. The dam's strategic location, design features, and state-regulated operations make it a vital infrastructure for flood control and water management in the region. As part of the Kansas City District, Dd No 125 plays a crucial role in safeguarding the community against potential flooding events and ensuring the safety of residents in Neosho Rapids.

Year Completed

1988

Dam Length

890

Dam Height

24

River Or Stream

ALLEN CREEK-TR

Primary Dam Type

Earth

Surface Area

7.22

Drainage Area

0.52

Nid Storage

212.28

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

24
       
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.