Rodney Subwatershed Site 8-1 Reservoir Report
Last Updated: December 14, 2025
Rodney Subwatershed Site 8-1, located in Monona, Iowa, is a local government-owned dam structure designed by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
Completed in 1969, this earth dam stands at a height of 53 feet, with a length of 555 feet, and a storage capacity of 86 acre-feet. Its primary function is flood risk reduction for the TR-Little Sioux River, within the Omaha District.
With a drainage area of 0.35 square miles, the dam has a low hazard potential and a moderate risk assessment rating. Although the condition assessment is currently not rated, the dam has not undergone any significant modifications or inspections recently. While the spillway type is uncontrolled, there are no outlet gates or associated structures. The site's emergency action plan status, inundation maps, and risk management measures remain unspecified.
Water resource and climate enthusiasts interested in Rodney Subwatershed Site 8-1 will find its location, design, and purpose intriguing. The dam's role in fire protection and flood risk reduction for the local area underscores its importance in water management and environmental conservation efforts. Monitoring its condition, inspection frequency, and emergency preparedness will be crucial for ensuring the safety and sustainability of this vital infrastructure in the Rodney community.
Year Completed |
1969 |
Dam Length |
555 |
Dam Height |
53 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
4.2 |
Drainage Area |
0.35 |
Nid Storage |
86 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
53 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
14900cfs |
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.
Rodney Subwatershed Site 8-1