Wolf Creek Subwatershed Site 4-4 Reservoir Report
Last Updated: December 14, 2025
Wolf Creek Subwatershed Site 4-4, located in Woodbury, Iowa, is a key site managed by local government for multiple purposes including fire protection, stock, small fish pond, and flood risk reduction.
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Summary
Constructed in 1991 by the USDA NRCS, this earthen dam stands at 39 feet tall with a length of 928 feet, creating a reservoir with a storage capacity of 211 acre-feet and a surface area of 10.5 acres. The dam is regulated by the Iowa DNR and undergoes regular inspections with a low hazard potential.
This site on TR- East Fork Wolf Creek plays a crucial role in water resource management, helping to mitigate flood risks in the area. With a drainage area of 1.15 square miles and a normal storage capacity of 78 acre-feet, the dam serves as a vital infrastructure for the surrounding community. Despite its moderate risk assessment rating, the dam has not been officially rated for its condition, highlighting the need for ongoing monitoring and maintenance to ensure its continued effectiveness in protecting the area from potential water-related hazards. Climate and water resource enthusiasts will find Wolf Creek Subwatershed Site 4-4 a fascinating case study in dam infrastructure and its role in sustainable water management practices.
Year Completed |
1991 |
Dam Length |
928 |
Dam Height |
39 |
River Or Stream |
TR- EAST FORK WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
10.5 |
Drainage Area |
1.15 |
Nid Storage |
211 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
39 |
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 4-4