Wyaconda City Dam Reservoir Report

Last Updated: December 9, 2025

Wyaconda City Dam, located in Medill, Missouri, is a vital water supply structure that was completed in 1977.


°F

°F

mph

Wind

%

Humidity

Summary

Owned by the local government, this earth dam stands at a height of 32 feet and has a storage capacity of 120 acre-feet. Serving the primary purpose of water supply, the dam is situated on the TR-South Wyaconda River and has a drainage area of 200 square miles.

Despite being classified as a high hazard potential dam, with a condition assessment of "Not Rated," Wyaconda City Dam plays a crucial role in providing water to the surrounding area. With a normal storage capacity of 45 acre-feet and a surface area of 7 acres, the dam has not undergone any modifications since its completion. Although last inspected in 1978, the dam lacks a current assessment of its condition and emergency action plan preparedness.

This dam, under the jurisdiction of the Rock Island District of the US Army Corps of Engineers, poses a vital link in the water resource infrastructure of Clark County, Missouri. Enthusiasts of water resources and climate will find the Wyaconda City Dam an intriguing example of a local government-owned structure that requires further assessment and monitoring to ensure its continued safety and efficiency in water supply management.

Year Completed

1977

Dam Height

32

River Or Stream

TR-SOUTH WYACONDA RIVER

Primary Dam Type

Earth

Surface Area

7

Drainage Area

200

Nid Storage

120

Structural Height

32

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

32
       
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.