Soap Creek Watershed Site 26-37a Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 26-37a, located in Davis County, Iowa, is a vital water resource managed by the USDA NRCS with a primary purpose of fire protection, stock, or small fish pond.


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Summary

This earth dam, completed in 1997, stands at 16 feet high and has a storage capacity of 135 acre-feet. With a surface area of 9.6 acres and draining an area of 0.53 square miles, this low hazard potential structure plays a critical role in flood risk reduction for the region.

Managed by the Iowa DNR, this dam on the TR-Soap Creek is state-regulated, permitted, inspected, and enforced, ensuring its structural integrity and safety. Designated as having a moderate risk level, the condition assessment for Soap Creek Watershed Site 26-37a is currently not rated. While the emergency action plan status and risk management measures are not specified, the presence of state oversight and enforcement bodes well for the protection and preservation of this essential water resource in the region.

Overall, Soap Creek Watershed Site 26-37a stands as a testament to effective collaboration between the local government, federal agencies, and regulatory bodies in managing and safeguarding water resources in Iowa. With its strategic location in the Rock Island District and capacity to mitigate flood risks, this dam plays a crucial role in maintaining water security and environmental resilience in the Soap Creek watershed area, making it a site of significant importance for water resource and climate enthusiasts alike.

Year Completed

1997

Dam Length

1755

Dam Height

16

River Or Stream

TR- SOAP CREEK

Primary Dam Type

Earth

Surface Area

9.6

Drainage Area

0.53

Nid Storage

135

Hazard Potential

Low

Foundations

Soil

Nid Height

16
       
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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.