Mike Mikkelson Subwatershed 3-1630 Reservoir Report
Last Updated: December 14, 2025
Located in Monona, Iowa, the Mike Mikkelson Subwatershed 3-1630 is a vital water resource managed by the local government.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam, completed in 1960, serves multiple purposes including fire protection, stock maintenance, and flood risk reduction. With a storage capacity of 28 acre-feet and a drainage area of 0.63 square miles, this dam on TR- Cottonwood Creek plays a crucial role in managing water resources in the area.
Managed by the Natural Resources Conservation Service, the Mike Mikkelson Subwatershed 3-1630 has a low hazard potential and a moderate risk assessment rating. Despite its age, the dam's condition is currently not rated, emphasizing the need for regular inspections and maintenance to ensure its continued effectiveness. With a surface area of 2 acres and a maximum discharge capacity, this dam is a key asset in the region's water management infrastructure.
As climate change continues to impact water resources, the Mike Mikkelson Subwatershed 3-1630 stands as a testament to the importance of sustainable water management practices. With its strategic location and multiple functions, this dam plays a critical role in protecting the local community from water-related hazards and ensuring a reliable water supply for various uses.
Year Completed |
1960 |
Dam Height |
39 |
River Or Stream |
TR- COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.63 |
Nid Storage |
28 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
39 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |
Maple River At Mapleton
|
323cfs |
Missouri River At Decatur
|
14900cfs |
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 3-1630