Wyandotte County Lake Dam Reservoir Report

Last Updated: December 7, 2025

Wyandotte County Lake Dam, also known as Marshall Creek Dam, is a local government-owned structure located in Kansas City, Kansas.


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Summary

Completed in 1941 by the Corps of Engineers, this earth dam stands at a height of 97.5 feet with a hydraulic height of 118 feet and a structural height of 139 feet. It spans a length of 1790 feet and has a normal storage capacity of 10,000 acre-feet. Situated on the Missouri River, the dam serves primarily for recreational purposes, offering a surface area of 375 acres for outdoor activities.

Despite being regulated by the Kansas Department of Agriculture and subject to state inspection and enforcement, the dam is classified as having a significant hazard potential with a fair condition assessment. The last inspection was conducted in March 2016, with a frequency of every 5 years. While the dam lacks certain safety features such as spillways and outlet gates, it remains a popular destination for water resource and climate enthusiasts seeking recreational opportunities in the Wyandotte County area. As one of the key structures in the region, the dam plays a vital role in managing water resources and providing a scenic backdrop for outdoor recreation.

With its historical significance and impressive design by the Corps of Engineers, Wyandotte County Lake Dam stands as a prominent landmark in the Kansas City District. Boasting a storage capacity of 14,700 acre-feet and a maximum discharge of 11,000 cubic feet per second, the dam continues to attract visitors seeking a tranquil environment amidst the natural beauty of the Missouri River. As efforts are made to ensure the safety and maintenance of this iconic structure, it remains a symbol of the harmonious coexistence between human development and environmental preservation in the region.

Year Completed

1941

Dam Length

1790

Dam Height

97.5

River Or Stream

MISSOURI RIVER

Primary Dam Type

Earth

Surface Area

375

Hydraulic Height

118

Drainage Area

8

Nid Storage

14700

Structural Height

139

Outlet Gates

None

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

139
       
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.
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Area Campgrounds