Soap Creek Watershed Site 26-127 Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 26-127 in Selma, Iowa, is a local government-owned dam designed by USDA NRCS to reduce flood risks along Trip to Coon Creek.


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Summary

Completed in 2009, this earth dam stands at 37 feet high and spans 440 feet in length, with a storage capacity of 163 acre-feet. Despite its low hazard potential, the dam remains uncontrolled, with a spillway width of 16 feet and an associated drainage area of 0.53 square miles.

Located in Davis County, Iowa, this dam serves a critical purpose in flood risk reduction for the surrounding area. With a normalized storage capacity of 35 acre-feet and a surface area of 5 acres, Soap Creek Watershed Site 26-127 plays a vital role in managing water flow during heavy rainfall events. Managed by the Iowa Department of Natural Resources, this dam is regulated, permitted, and inspected by state authorities to ensure its ongoing effectiveness and safety for the community.

Managed by the Natural Resources Conservation Service, this dam has not been rated for its current condition but remains in operation to protect the local area from potential flooding. With its strategic location and design, Soap Creek Watershed Site 26-127 stands as a testament to collaborative efforts in water resource management and climate resilience in the state of Iowa.

Year Completed

2009

Dam Length

440

Dam Height

37

River Or Stream

Trip to Coon Creek

Primary Dam Type

Earth

Surface Area

5

Drainage Area

0.53

Nid Storage

163

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

37
       
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.