Waubonsie Cr. Watershed Site 36-2 Reservoir Report

Last Updated: December 5, 2025

Located in Mills, Iowa, Waubonsie Cr.


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Summary

Watershed Site 36-2 is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources. This site, designed by the USDA NRCS, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. The earth dam, completed in 1983, stands at a height of 53 feet and has a storage capacity of 144 acre-feet, with a drainage area of 0.38 square miles.

With a low hazard potential and a moderate risk assessment rating, Waubonsie Cr. Watershed Site 36-2 plays a crucial role in protecting the surrounding area from flooding and providing essential water resources for various purposes. The dam's spillway type is uncontrolled, and it has not been modified since its completion. Although the condition assessment is currently rated as "Not Rated," the site is regularly inspected and maintained to ensure its functionality and safety for the community.

As part of the Omaha District, this watershed site contributes to the overall water management efforts in the region. With its strategic location and design features, Waubonsie Cr. Watershed Site 36-2 stands as a testament to effective water resource management and serves as a valuable asset for both water enthusiasts and climate advocates seeking to understand and promote sustainable water conservation practices.

Year Completed

1983

Dam Length

640

Dam Height

53

River Or Stream

TR- WAUBONSIE CR.

Primary Dam Type

Earth

Surface Area

5.2

Drainage Area

0.38

Nid Storage

144

Hazard Potential

Low

Foundations

Soil

Nid Height

53
       
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.