Waucoma Milldam Reservoir Report

Last Updated: December 5, 2025

Waucoma Milldam, located in Fayette County, Iowa, is a historic gravity dam built in 1914 on the Turkey River for the primary purpose of recreation.


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Summary

With a height of 11 feet and a length of 224 feet, the dam provides a storage capacity of 271 acre-feet and covers a surface area of 50 acres. Despite its age, the dam is classified as having a low hazard potential and a moderate risk assessment rating.

Managed by the Iowa Department of Natural Resources (DNR), Waucoma Milldam is regulated, permitted, inspected, and enforced by the state agency to ensure its structural integrity and safety. The dam features an uncontrolled spillway and is situated in a picturesque setting ideal for outdoor activities such as fishing, boating, and wildlife observation. While the dam's condition assessment is currently not rated, it remains a popular destination for water resource and climate enthusiasts seeking to explore the natural beauty of the area.

Although lacking recent inspection and maintenance data, Waucoma Milldam continues to be a focal point for recreational opportunities along the Turkey River. As one of the many historic dams in Iowa, it serves as a reminder of the state's rich water resource heritage and the importance of responsible dam management in the face of changing climate conditions. Whether for leisurely enjoyment or environmental appreciation, the dam offers visitors a chance to connect with nature and appreciate the vital role of water resources in sustaining ecosystems and communities.

Year Completed

1914

Dam Length

224

Dam Height

11

River Or Stream

TURKEY RIVER

Primary Dam Type

Gravity

Surface Area

50

Drainage Area

90

Nid Storage

271

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

11
       
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.