Soap Creek Watershed Site 90-95 Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 90-95, located in Wapello County, Iowa, is a vital water resource managed by the local government and designed by the USDA NRCS.


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Summary

This site plays a crucial role in flood risk reduction, with a primary purpose of mitigating potential flooding along the TR- Little Soap Creek. The earth dam, completed in 2003, stands at a height of 27 feet and has a storage capacity of 135 acre-feet, serving a drainage area of 0.49 square miles.

With a surface area of 5.4 acres, Soap Creek Watershed Site 90-95 is regulated by the Iowa DNR and has a low hazard potential, rated as moderate in terms of risk assessment. While currently not rated for condition assessment, the site meets state permitting and inspection requirements, ensuring its operational integrity. Despite its uncontrolled spillway type, the dam serves as a critical infrastructure in managing water flow and reducing flood risks in the region. For water resource and climate enthusiasts, this site presents a fascinating case study in sustainable water management practices and the importance of infrastructure in promoting resilience against extreme weather events.

Year Completed

2003

Dam Length

325

Dam Height

27

River Or Stream

TR- LITTLE SOAP CREEK

Primary Dam Type

Earth

Surface Area

5.4

Drainage Area

0.49

Nid Storage

135

Hazard Potential

Low

Foundations

Soil

Nid Height

27
       
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.