Fee Subwatershd Sta 31+62.5 Main Gully Reservoir Report
Last Updated: December 13, 2025
The Fee Subwatershed Station 31+62.5 Main Gully is a key water resource structure located in the Little Sioux River watershed in Iowa.
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Summary
Built in 1954 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a height of 27 feet and a length of 500 feet, the dam has a storage capacity of 109 acre-feet, providing flood risk reduction benefits to the surrounding area.
Managed by the local government and regulated by the Iowa DNR, this dam plays a crucial role in water resource management in Cherokee County. Despite being rated as having low hazard potential, the dam's risk assessment indicates a moderate level of risk, requiring ongoing monitoring and management. The structure is designed to have uncontrolled spillways and has not been modified in recent years. While the condition assessment is currently not rated, regular inspections and maintenance are important to ensure the dam's continued effectiveness in protecting the community and environment.
Water and climate enthusiasts in the area can appreciate the significance of the Fee Subwatershed Station 31+62.5 Main Gully in maintaining water quality, supporting wildlife habitats, and mitigating flood risks. As a vital piece of infrastructure in the watershed, this dam serves as a reminder of the interconnectedness of water resources and the importance of sustainable management practices to ensure the resilience of our ecosystems in the face of a changing climate.
Year Completed |
1954 |
Dam Length |
500 |
Dam Height |
27 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
1.3 |
Nid Storage |
109 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Little Sioux River At Linn Grove
|
257cfs |
Floyd River At Alton
|
36cfs |
Maple River At Mapleton
|
323cfs |
Floyd River At James
|
187cfs |
West Fork Ditch At Hornick
|
80cfs |
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.
Fee Subwatershd Sta 31+62.5 Main Gully