Idot Wetland Dam Reservoir Report

Last Updated: December 13, 2025

The Idot Wetland Dam, located in Louisa County, Iowa, was completed in 1994 with a primary purpose of recreation.


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Summary

Designed by the USDA NRCS, this earth dam stands at a height of 8 feet and spans a length of 715 feet, providing storage capacity of 441 acre-feet. Situated on the TR-Iowa River, this dam is regulated by the Iowa DNR and is subject to state permitting, inspection, and enforcement to ensure its safety and compliance with regulations.

With a low hazard potential and a moderate risk assessment rating, the Idot Wetland Dam serves as a valuable resource for water management and conservation efforts in the region. While not currently rated for its condition, this dam plays a crucial role in providing recreational opportunities and supporting the surrounding ecosystem. As climate change continues to impact water resources, structures like the Idot Wetland Dam will be essential for mitigating flood risks and maintaining water quality in the area.

As enthusiasts of water resources and climate, it is important to recognize the significance of infrastructure like the Idot Wetland Dam in preserving and managing our natural resources. By understanding the design, purpose, and regulatory oversight of such structures, we can appreciate the role they play in safeguarding our environment and communities. The Idot Wetland Dam stands as a testament to the collaboration between state and federal agencies in ensuring the sustainable management of water resources in Iowa.

Year Completed

1994

Dam Length

715

Dam Height

8

River Or Stream

TR- IOWA RIVER

Primary Dam Type

Earth

Surface Area

71.3

Drainage Area

1.47

Nid Storage

441

Hazard Potential

Low

Foundations

Soil

Nid Height

8
       
Seasonal Comparison

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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.