Mike Mikkelson Subwatershed 5-13484 Reservoir Report
Last Updated: December 14, 2025
Located in Monona County, Iowa, the Mike Mikkelson Subwatershed 5-13484 is a local government-owned dam designed by the USDA NRCS for fire protection, stock, or small fish pond purposes.
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Summary
Completed in 1960, this earth dam stands at a height of 35 feet and has a storage capacity of 88 acre-feet. The dam is situated on TR- Cottonwood Creek and is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
With a low hazard potential and a moderate risk assessment rating, the Mike Mikkelson Subwatershed 5-13484 dam serves as a vital infrastructure for flood risk reduction in the area. Despite not having a current condition assessment, the dam's purpose, design, and construction details highlight its importance in protecting the surrounding community and environment. With a drainage area of 1.65 square miles and a surface area of 5 acres, this dam plays a crucial role in managing water resources and maintaining water quality in the Little Sioux area.
As water resource and climate enthusiasts, it is essential to recognize the significance of structures like the Mike Mikkelson Subwatershed 5-13484 dam in enhancing resilience to extreme weather events and mitigating flood risks. With state-regulated operations and a focus on emergency preparedness, this dam stands as a testament to the proactive measures taken to safeguard communities and ecosystems from potential water-related hazards. As we continue to address the challenges of climate change, understanding and supporting sustainable water management practices will be key in ensuring a resilient and secure future for all.
Year Completed |
1960 |
Dam Height |
35 |
River Or Stream |
TR- COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
1.65 |
Nid Storage |
88 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |
Missouri River At Decatur
|
14900cfs |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Mike Mikkelson Subwatershed 5-13484