Site No. 129 Reservoir Report

Last Updated: December 5, 2025

Site No.


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Summary

129, located in Lyon County, Kansas, is a local government-owned earth dam designed by USDA NRCS and completed in 1988. The primary purpose of this dam is flood risk reduction, with additional benefits including fire protection, stock, or small fish pond management. The dam has a height of 19 feet, a length of 800 feet, and a storage capacity of 123.02 acre-feet, providing essential water resource management for the area.

Situated on Dow Creek-TR, this dam plays a crucial role in managing the water resources in the region. With a low hazard potential and a condition assessment of "Not Rated," Site No. 129 is a vital infrastructure for flood control and water storage. Although the dam has not been inspected recently and lacks certain emergency preparedness measures, its presence serves as a testament to the collaborative efforts between local government and the Natural Resources Conservation Service in safeguarding the community from potential water-related disasters.

As a part of the Kansas City District, this dam contributes to the overall water resource management strategy in the area. While there are no associated structures or locks, the dam's storage capacity and flood risk reduction capabilities make it a valuable asset for climate and water enthusiasts. With its strategic location and design features, Site No. 129 stands as a testament to the importance of sustainable water infrastructure in mitigating the impacts of climate change on local communities.

Year Completed

1988

Dam Length

800

Dam Height

19

River Or Stream

DOW CREEK-TR

Primary Dam Type

Earth

Surface Area

3.64

Drainage Area

0.28

Nid Storage

123.02

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

19
       
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.