Dd No 205 Reservoir Report

Last Updated: December 5, 2025

Dd No 205, located in Lyon County, Kansas, is a local government-owned earth dam designed by Mid-Kansas of Topeka.


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Summary

This dam, with a height of 28 feet and a length of 1200 feet, serves the primary purpose of flood risk reduction along Bluff Creek. It has a storage capacity of 424.9 acre-feet and a drainage area of 1.03 square miles, with a normal storage level of 42.3 acre-feet.

The dam's spillway, with a width of 40 feet, is uncontrolled, and the hazard potential is deemed significant, with a fair condition assessment. The dam is regulated by the Kansas Department of Agriculture and undergoes regular inspections, with the last one conducted in June 2018. The risk assessment for Dd No 205 is moderate, highlighting the need for ongoing risk management measures to ensure the dam's safety and efficacy in mitigating flood risk for the surrounding area.

As water resource and climate enthusiasts, it is crucial to monitor and support the maintenance and management of infrastructure like Dd No 205 to safeguard communities and ecosystems from the impacts of extreme weather events. By staying informed about the dam's condition, regulatory oversight, and risk assessment, stakeholders can work towards sustainable water resource management and climate resilience in the region.

Dam Length

1200

Dam Height

28

River Or Stream

BLUFF CREEK-TR

Primary Dam Type

Earth

Surface Area

10.3

Drainage Area

1.03

Nid Storage

424.9

Outlet Gates

None

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

28
       
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.