Soap Creek Watershed Site 90-84 Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 90-84, located in Wapello, Iowa, is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources.


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Summary

This site, completed in 2004 by the USDA NRCS, serves as a flood risk reduction measure along the TR- Little Soap Creek. The earth dam stands at 33 feet tall and stretches 665 feet in length, providing a storage capacity of 892 acre-feet and covering a surface area of 26.8 acres.

With a low hazard potential and moderate risk assessment rating, Soap Creek Watershed Site 90-84 plays a crucial role in managing water flow in the region. The dam, constructed with soil foundations, is designed to withstand the demands of flood control while ensuring the safety of nearby communities. Despite being marked as "Not Rated" in terms of condition assessment, the site is regularly inspected and maintained to meet state regulatory standards, including permitting, inspection, and enforcement by the Iowa DNR.

Managed by the Natural Resources Conservation Service, Soap Creek Watershed Site 90-84 is an essential flood risk reduction infrastructure in the area. With its strategic location and design, this site contributes significantly to water resource management and climate resilience efforts in the region, safeguarding communities and ecosystems from the impacts of extreme weather events and flooding.

Year Completed

2004

Dam Length

665

Dam Height

33

River Or Stream

TR- LITTLE SOAP CREEK

Primary Dam Type

Earth

Surface Area

26.8

Drainage Area

2.55

Nid Storage

892

Hazard Potential

Low

Foundations

Soil

Nid Height

33
       
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.