Mucky Creek Subwatershed Sta 26+20 #3 Reservoir Report
Last Updated: December 14, 2025
Mucky Creek Subwatershed Sta 26+20 #3 is a dam located in Mapleton, Iowa, along the TR-MAPLE RIVER.
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Summary
Built in 1965 by the USDA NRCS, this earth dam stands at 38 feet high and spans 502 feet in length, with a storage capacity of 39 acre-feet. The primary purposes of this dam are for fire protection, stock, or small fish pond use, as well as flood risk reduction for the local community in Monona County.
Managed by the Iowa DNR, Mucky Creek Subwatershed Sta 26+20 #3 is classified as having a low hazard potential and a moderate risk assessment level. With a drainage area of 0.34 square miles and a normal storage capacity of 23 acre-feet, this dam plays a crucial role in managing water resources in the area. While it has not been rated for its condition assessment, regular inspections, enforcement, and permitting ensure its continued safety and functionality.
Water resource and climate enthusiasts interested in the intersection of infrastructure and environmental conservation will find Mucky Creek Subwatershed Sta 26+20 #3 to be a fascinating case study. This dam not only serves practical purposes for the local community but also highlights the importance of responsible management and regulation in ensuring the safety and sustainability of water resources in Iowa.
Year Completed |
1965 |
Dam Length |
502 |
Dam Height |
38 |
River Or Stream |
TR-MAPLE RIVER |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.34 |
Nid Storage |
39 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
West Fork Ditch At Hornick
|
80cfs |
Soldier River At Pisgah
|
112cfs |
Little Sioux River At Correctionville
|
327cfs |
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.
Mucky Creek Subwatershed Sta 26+20 #3