Soap Creek Watershed Site 4-109 Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 4-109, located in Appanoose County, 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 earth dam, designed by USDA NRCS and completed in 1992, serves multiple purposes including fire protection, stock watering, and flood risk reduction. With a dam height of 23 feet and a storage capacity of 72 acre-feet, this structure plays a crucial role in managing water resources in the area.

Despite its low hazard potential, the Soap Creek Watershed Site 4-109 is considered to have a moderate risk level, requiring ongoing risk assessment and management measures. The dam is primarily regulated by the Iowa DNR and is subject to state permitting, inspection, and enforcement. While the condition assessment is currently not rated, the structure's risk level is monitored closely to ensure its continued safety and effectiveness in managing water resources in the region.

Located along the TR-South Soap Creek, this site is a key component of the water management infrastructure in the area. With its multiple functions and moderate risk level, Soap Creek Watershed Site 4-109 represents a critical piece of the local water resource management strategy, highlighting the importance of sustainable practices in maintaining the health and resilience of the watershed.

Year Completed

1992

Dam Length

354

Dam Height

23

River Or Stream

TR-SOUTH SOAP CREEK

Primary Dam Type

Earth

Surface Area

3.5

Drainage Area

0.25

Nid Storage

72

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
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.