Big Wyacondah Watershed Site 21c Reservoir Report

Last Updated: December 6, 2025

Located in the heart of Davis County, Iowa, the Big Wyacondah Watershed Site 21c is a vital water resource managed by the local government.


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Summary

Designed by the USDA NRCS in 1976, this earth dam serves multiple purposes including fire protection, stock, and small fish pond maintenance, as well as flood risk reduction. With a dam height of 29 feet and a storage capacity of 140 acre-feet, this site plays a crucial role in water management within the TR-South Wyacondah river basin.

The Big Wyacondah Watershed Site 21c boasts a low hazard potential and a moderate risk assessment rating. While its condition assessment is currently not rated, the dam's ability to withstand emergencies and ensure public safety remains a top priority for the Iowa Department of Natural Resources. With state-regulated permitting, inspection, and enforcement in place, this site is well-equipped to handle any potential risks or challenges associated with its operation.

The picturesque location of this watershed site in the city of Wyacondah, Missouri, offers a valuable opportunity for water resource and climate enthusiasts to witness firsthand the intersection of human engineering with natural ecosystems. As part of the Kansas City District, this water management infrastructure stands as a testament to the importance of sustainable water resource management in the face of changing climatic conditions.

Year Completed

1976

Dam Length

510

Dam Height

29

River Or Stream

TR-SOUTH WYACONDAH

Primary Dam Type

Earth

Surface Area

9

Drainage Area

0.47

Nid Storage

140

Hazard Potential

Low

Foundations

Soil

Nid Height

29
       
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