Lake Waltanna Reservoir Report

Last Updated: December 5, 2025

Lake Waltanna in Sedgwick, Kansas, is a private water resource managed by the Kansas Department of Agriculture.


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Summary

Built by the USA WPA, this buttress dam serves multiple purposes including fire protection, stock, and small fish pond. With a dam height of 29 feet and a hydraulic height of 23 feet, Lake Waltanna has a maximum storage capacity of 228 acre-feet and a normal storage of 158 acre-feet. The low hazard potential of the dam makes it a safe and reliable source of water for the surrounding area.

Located in the city of Oxford, Lake Waltanna is fed by Afton Creek-TR and has a spillway width of 100 feet. Despite not being rated for condition assessment, the dam has a history of regular inspections and maintenance by the state regulatory agency. With a maximum discharge of 4426 cubic feet per second, the dam plays a crucial role in managing water levels and protecting the local ecosystem. Although the dam does not have an Emergency Action Plan in place, its low hazard potential and solid construction make it a valuable asset for water resource and climate enthusiasts in the region.

Overall, Lake Waltanna is a well-maintained private water resource with a primary focus on fire protection and stock management. Its strategic location in Sedgwick County, Kansas, and the efficient regulatory oversight by the state Department of Agriculture ensure the safety and sustainability of the dam. Water and climate enthusiasts can appreciate the functionality and importance of Lake Waltanna in providing essential services to the community while also preserving the natural environment of the area.

Dam Length

890

Dam Height

29

River Or Stream

AFTON CREEK-TR

Hydraulic Height

23

Nid Storage

228

Structural Height

29

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

29
       
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.