Soap Creek Watershed Site 68-58b Reservoir Report

Last Updated: December 6, 2025

Soap Creek Watershed Site 68-58b in Monroe, Iowa, is a flood risk reduction structure designed by the USDA NRCS and completed in 2005.


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Summary

This Earth dam, with a height of 33 feet and a length of 355 feet, serves the primary purpose of flood risk reduction and grade stabilization along the TR- KINSER CREEK. The dam has a storage capacity of 25 acre-feet, with a normal storage capacity of 8 acre-feet, and covers a drainage area of 0.12 square miles.

Located in Selma, Iowa, this low hazard potential dam has a moderate risk assessment rating and is not currently regulated by the state. With a spillway width of 1 foot and uncontrolled spillway type, the structure has not been inspected or assessed for condition as of the last data update in May 2021. Despite its small surface area of 1 acre, Soap Creek Watershed Site 68-58b plays a crucial role in mitigating flood risks and ensuring the stability of the surrounding environment. For water resource and climate enthusiasts, this site serves as a valuable example of collaborative efforts between local government agencies and federal partners in managing water resources effectively.

Year Completed

2005

Dam Length

355

Dam Height

33

River Or Stream

TR- KINSER CREEK

Primary Dam Type

Earth

Surface Area

1

Drainage Area

0.12

Nid Storage

25

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.