Reed Subwatershed Sta 45+25 #4 Reservoir Report
Last Updated: December 13, 2025
Located in Monona, Iowa, the Reed Subwatershed Sta 45+25 #4 is a locally owned earth dam completed in 1966 by the USDA NRCS with a primary purpose of fire protection, stock, or small fish pond.
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Summary
This low hazard potential dam on TR-McMaster Creek has a height of 51 feet, a length of 302 feet, and a drainage area of 0.38 square miles. With a normal storage capacity of 78 acre-feet and a maximum storage capacity of 105 acre-feet, the dam serves multiple purposes including flood risk reduction.
Maintained by the Iowa Department of Natural Resources, the Reed Subwatershed Sta 45+25 #4 dam is equipped with an uncontrolled spillway and is regularly inspected for safety and compliance. The risk assessment for this dam is categorized as moderate, indicating a potential need for risk management measures in the future. Despite its age, the dam's condition assessment is currently not rated, suggesting a need for further evaluation and maintenance to ensure its continued effectiveness in protecting the surrounding area from flood risks and providing essential water resources for the community.
Overall, the Reed Subwatershed Sta 45+25 #4 dam plays a crucial role in water resource management and climate resilience efforts in the Ticonic region. With its strategic location and design, this dam serves as a vital infrastructure for fire protection, stock maintenance, and small fish pond management, while also helping to mitigate flood risks in the area. As climate change continues to impact water resources, the proper maintenance and monitoring of dams like this one will be essential to ensure the safety and sustainability of communities in the face of evolving environmental challenges.
Year Completed |
1966 |
Dam Length |
302 |
Dam Height |
51 |
River Or Stream |
TR-MC MASTER CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.2 |
Drainage Area |
0.38 |
Nid Storage |
105 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
51 |
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
|
15500cfs |
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.
Reed Subwatershed Sta 45+25 #4