Windmiller Dam #1 Reservoir Report

Last Updated: December 9, 2025

Windmiller Dam #1, located in Cedar City, Missouri, is a privately owned earth dam primarily used for recreation purposes.


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Summary

Built in 1962, the dam stands at a height of 30 feet and has a storage capacity of 369 acre-feet. It is situated on the TR-Cedar Creek river, with a drainage area of 850 acres and a surface area of 23 acres.

Despite being privately owned, Windmiller Dam #1 has a high hazard potential and a condition assessment that is currently not rated. The last inspection of the dam was conducted in 1979, indicating a need for updated assessments and measures to ensure its safety. With its location in Boone County, Missouri, the dam poses a risk to the surrounding area in the event of a potential breach or failure.

For water resource and climate enthusiasts, Windmiller Dam #1 serves as an intriguing case study of a privately owned structure with recreational purposes that also presents potential safety risks. As climate change continues to impact water resources and infrastructure, the need for regular inspections, risk assessments, and emergency preparedness for dams like Windmiller Dam #1 becomes increasingly crucial to ensure the safety of communities and the environment.

Year Completed

1962

Dam Height

30

River Or Stream

TR-CEDAR CREEK

Primary Dam Type

Earth

Surface Area

23

Drainage Area

850

Nid Storage

369

Structural Height

30

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

30
       
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.