Rodney Subwatershed Site 8-2 Reservoir Report
Last Updated: December 14, 2025
Rodney Subwatershed Site 8-2, located in Monona, Iowa, is a local government-owned earth dam completed in 1969 for multiple purposes including fire protection, stock, small fish pond, and flood risk reduction.
°F
°F
mph
Wind
%
Humidity
Summary
With a height of 35 feet and a length of 338 feet, this dam has a storage capacity of 90 acre-feet and covers a surface area of 5.9 acres, serving a drainage area of 0.6 square miles. Despite its low hazard potential and moderate risk assessment, the condition of the dam has not been rated, and it has not undergone recent inspections or maintenance.
Managed by the USDA NRCS and regulated by the Iowa DNR, Rodney Subwatershed Site 8-2 is situated along the TR-Little Sioux River and falls under the jurisdiction of the state of Iowa. The primary purpose of the dam is to provide essential services while minimizing the risk of inundation and ensuring public safety. As an uncontrolled spillway type structure with no outlet gates, the dam is designed to withstand potential flood events and protect downstream areas from excessive water discharge.
Although the dam's condition assessment and emergency preparedness status remain unknown, its critical role in mitigating flood risks and enhancing water resource management in the region is evident. As water resource and climate enthusiasts, understanding the characteristics and functions of Rodney Subwatershed Site 8-2 sheds light on the importance of effective dam maintenance, inspection, and risk management practices to safeguard communities and ecosystems from potential hazards.
Year Completed |
1969 |
Dam Length |
338 |
Dam Height |
35 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5.9 |
Drainage Area |
0.6 |
Nid Storage |
90 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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
|
15500cfs |
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 8-2