Simon Run Watershed Site 4-2 Reservoir Report

Last Updated: December 14, 2025

Located in Pottawattamie, Iowa, the Simon Run Watershed Site 4-2 is a vital water resource managed by the local government.


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Summary

Designed by the USDA NRCS and regulated by the Iowa DNR, this site serves multiple purposes including fire protection, stock, small fish pond, flood risk reduction, and recreation. Completed in 1976, the earth dam stands at a height of 41 feet, with a storage capacity of 57 acre-feet and a surface area of 2.8 acres.

With a low hazard potential and a moderate risk assessment score of 3, the Simon Run Watershed Site 4-2 is essential for maintaining water resources in the area. While the condition assessment is marked as "Not Rated," the dam is regularly inspected, permitted, and enforced for the safety of the surrounding community. In the event of an emergency, the site's emergency action plan (EAP) status and risk management measures are yet to be determined, emphasizing the need for ongoing monitoring and preparedness.

As a key structure in the TR-SIMONS CREEK watershed, the Simon Run Watershed Site 4-2 plays a crucial role in water management and conservation efforts in Iowa. With its strategic location and multiple functions, including flood risk reduction and recreational opportunities, this site highlights the importance of sustainable water resource management for both environmental protection and community safety.

Year Completed

1976

Dam Length

475

Dam Height

41

River Or Stream

TR-SIMONS CREEK

Primary Dam Type

Earth

Surface Area

2.8

Drainage Area

0.27

Nid Storage

57

Hazard Potential

Low

Foundations

Soil

Nid Height

41
       
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.