Olpe City Lake Reservoir Report

Last Updated: December 5, 2025

Olpe City Lake, also known as Olpe City Dam, is a picturesque water resource located in Lyon County, Kansas.


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Summary

The dam was completed in 1965 and serves as a vital water supply for the local community. With a normal storage capacity of 475 acre-feet and a maximum storage of 879 acre-feet, the lake covers a surface area of 75 acres and has a drainage area of 1.52 square miles.

Managed by the local government and regulated by the Kansas Department of Agriculture, Olpe City Lake is primarily used for water supply but also offers recreational opportunities. The dam is classified as an Earth dam with a structural height of 43 feet and a hydraulic height of 25 feet. The spillway, with a width of 100 feet, is uncontrolled, and the hazard potential of the dam is rated as low.

Although the condition assessment of the dam is fair, with moderate risk management measures in place, the overall risk assessment is deemed moderate. The last inspection of the dam was conducted in 2013, and the emergency action plan (EAP) status is currently unknown. Olpe City Lake provides a serene and functional water resource for the community while also offering a peaceful setting for recreational activities.

Year Completed

1965

Dam Length

1700

Dam Height

24

River Or Stream

EAGLE CREEK-TR

Primary Dam Type

Earth

Surface Area

75

Hydraulic Height

25

Drainage Area

1.52

Nid Storage

879

Structural Height

43

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

43
       
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.