Monona County Roadgrade Dam 5-82-42 Reservoir Report
Last Updated: December 13, 2025
Monona County Roadgrade Dam 5-82-42, located in Iowa along the TR-SOLDIER RIVER, was completed in 1967 and serves multiple purposes including fire protection, stock, and small fish pond management.
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Summary
Owned by the local government, this earth dam stands at a height of 45 feet and has a storage capacity of 55 acre-feet. With a surface area of 2.9 acres and a drainage area of 0.27 square miles, this dam plays a crucial role in water resource management in Monona County.
Managed by the USDA NRCS and regulated by the Iowa DNR, Monona County Roadgrade Dam 5-82-42 has a low hazard potential and a moderate risk assessment rating. While the dam is not currently rated in terms of condition assessment, it undergoes regular state inspections and permitting to ensure its continued safety and functionality. Despite its uncontrolled spillway type, this dam has played a significant role in water control and conservation efforts in the region.
As a key structure within the water management infrastructure of Monona County, this dam showcases the collaborative efforts between local and state agencies to maintain water resources and protect against potential hazards. With its strategic location and multi-purpose design, Monona County Roadgrade Dam 5-82-42 stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns and increasing environmental challenges.
Year Completed |
1967 |
Dam Length |
573 |
Dam Height |
45 |
River Or Stream |
TR-SOLDIER RIVER |
Primary Dam Type |
Earth |
Surface Area |
2.9 |
Drainage Area |
0.27 |
Nid Storage |
55 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River Near Turin
|
1040cfs |
Soldier River At Pisgah
|
112cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Maple River At Mapleton
|
323cfs |
Boyer River At Logan
|
417cfs |
Missouri River At Decatur
|
15500cfs |
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.
Monona County Roadgrade Dam 5-82-42