Wolf Creek Subwatershed Site 3-1 Reservoir Report
Last Updated: December 14, 2025
Wolf Creek Subwatershed Site 3-1, located in Woodbury County, Iowa, is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
Built in 1972 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction. With a maximum storage capacity of 24 acre-feet and a normal storage of 17 acre-feet, the dam covers a surface area of 3 acres and has a drainage area of 0.18 square miles.
Despite being classified as having a low hazard potential, the dam's risk assessment is moderate (3), indicating a need for ongoing monitoring and maintenance. The spillway, of uncontrolled type, ensures proper water flow management, while the dam's foundation is supported by soil. While the condition assessment is currently not rated, the site has not had any reported inspections or emergency action plans in place. As a crucial water management structure within the Wolf Creek subwatershed, ensuring the safety and functionality of Site 3-1 is essential for both water resource sustainability and climate resilience in the region.
Year Completed |
1972 |
Dam Height |
33 |
River Or Stream |
TR- EAST FORK WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.18 |
Nid Storage |
24 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15100cfs |
Omaha Cr At Homer
|
45cfs |
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.
Wolf Creek Subwatershed Site 3-1