Mc Call Subwatershed Site M-2 Reservoir Report
Last Updated: December 15, 2025
Located in Monona County, Iowa, the Mc Call Subwatershed Site M-2 is a vital water resource managed by the local government for multiple purposes including fire protection, stock, small fish pond, and flood risk reduction.
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Summary
Built in 1963 by the USDA NRCS, this earth dam stands at a height of 47 feet and has a storage capacity of 293 acre-feet, serving a drainage area of 1.34 square miles along the Gard Creek.
With a surface area of 14.6 acres, the Mc Call Subwatershed Site M-2 is regulated by the Iowa Department of Natural Resources and is classified as having a low hazard potential. The site has not been rated for its condition assessment, but the risk assessment indicates a moderate risk level. While no specific risk management measures have been listed, the dam is inspected and maintained by local authorities to ensure its operational integrity and safety for the surrounding community.
Although there are no associated structures or outlet gates, the Mc Call Subwatershed Site M-2 plays a crucial role in water management and environmental protection in the region. As climate change continues to impact water resources, the site stands as a testament to the importance of sustainable infrastructure and proactive risk management in safeguarding communities against potential hazards.
Year Completed |
1963 |
Dam Length |
498 |
Dam Height |
47 |
River Or Stream |
GARD CREEK |
Primary Dam Type |
Earth |
Surface Area |
14.6 |
Drainage Area |
1.34 |
Nid Storage |
293 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
14800cfs |
Soldier River At Pisgah
|
112cfs |
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.
Mc Call Subwatershed Site M-2