Big Wyacondah Watershed Site 32-3 Reservoir Report

Last Updated: December 6, 2025

Located in the heart of Davis County, Iowa, Big Wyacondah Watershed Site 32-3 is a critical water resource managed by the local government for various purposes including fire protection, stock, small fish pond maintenance, and flood risk reduction.


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Summary

This earth dam, designed by USDA NRCS and completed in 1966, stands at a height of 19 feet and has a storage capacity of 133 acre-feet. The dam serves the TR-South Wyacondah River and covers a drainage area of 0.6 square miles, with a surface area of 3 acres.

Despite its low hazard potential, Big Wyacondah Watershed Site 32-3 is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its structural integrity. The dam's risk assessment is moderate, highlighting the importance of ongoing monitoring and management measures. While the dam's condition is currently not rated, its purposeful design and strategic location make it a key component in the local water management system for both agricultural and environmental benefits.

As a part of the comprehensive water infrastructure in the area, Big Wyacondah Watershed Site 32-3 plays a crucial role in mitigating flood risks and ensuring water availability for various uses. With its historical significance dating back to the mid-20th century, the dam continues to uphold its purpose in safeguarding the local ecosystem and supporting sustainable water resource management practices in the region.

Year Completed

1966

Dam Length

558

Dam Height

19

River Or Stream

TR-SOUTH WYACONDAH RIVER

Primary Dam Type

Earth

Surface Area

3

Drainage Area

0.6

Nid Storage

133

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
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.