Barber Hollow Subwatershed Site 5-1 Reservoir Report
Last Updated: December 13, 2025
Barber Hollow Subwatershed Site 5-1, located in Monona, Iowa, is a low hazard potential earth dam constructed in 1966 for fire protection, stock, small fish pond, and flood risk reduction purposes.
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Summary
Managed by the USDA NRCS, this dam stands at a height of 51 feet and spans 411 feet in length, with a storage capacity of 44 acre-feet. Despite its uncontrolled spillway type, the dam has a moderate risk assessment rating of 3, and its condition has not been rated yet.
Situated along the TR-Little Sioux County Ditch, this dam is under state regulation, permitting, inspection, and enforcement by the Iowa DNR. With a drainage area of 0.29 square miles and a surface area of 1.9 acres, Barber Hollow Subwatershed Site 5-1 plays a crucial role in managing water resources in the region. Although it has not undergone a recent inspection or assessment, the dam's location and purpose make it an important asset for local water resource management and climate resilience efforts.
Overall, Barber Hollow Subwatershed Site 5-1 serves as a vital infrastructure for water management and flood risk reduction in Rodney, Iowa. With its earth dam structure and storage capacity, this site contributes to the protection of surrounding areas from potential water-related hazards. As water resource and climate enthusiasts, monitoring and maintaining the condition of this dam is essential to ensure its continued effectiveness in safeguarding the community and ecosystem.
Year Completed |
1966 |
Dam Length |
411 |
Dam Height |
51 |
River Or Stream |
TR-LITTLE SIOUX COUNTY DITCH |
Primary Dam Type |
Earth |
Surface Area |
1.9 |
Drainage Area |
0.29 |
Nid Storage |
44 |
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 |
Little Sioux River At Correctionville
|
327cfs |
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.
Barber Hollow Subwatershed Site 5-1