Wolf Creek Subwatershed Site 3-2 Reservoir Report
Last Updated: December 14, 2025
Wolf Creek Subwatershed Site 3-2 in Woodbury, Iowa, is a local government-owned earth dam completed in 1971 by the USDA NRCS.
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Summary
This dam serves multiple purposes, including fire protection, stock, or small fish pond, and flood risk reduction, with a primary purpose of fire protection. With a height of 35 feet and a length of 502 feet, the dam has a storage capacity of 55 acre-feet and a surface area of 3.5 acres, impacting a drainage area of 0.42 square miles along the TR-Wolf Creek.
Despite its low hazard potential and moderate risk assessment, the dam's condition is currently not rated, with no recent inspection data available. Nevertheless, it is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safe operation and maintenance. The dam features an uncontrolled spillway and soil foundation, making it a critical infrastructure for water resource management in the region.
Water resource and climate enthusiasts will find Wolf Creek Subwatershed Site 3-2 to be an essential component of the local water infrastructure, providing valuable services such as flood risk reduction and fire protection. As a well-established earth dam with a long history of serving the community, its continued monitoring and maintenance are crucial to ensuring its resilience in the face of changing climate conditions and evolving regulatory requirements. With its strategic location and significant impact on the surrounding area, this site exemplifies the intersection of water management, environmental stewardship, and public safety in the context of a changing climate.
Year Completed |
1971 |
Dam Length |
502 |
Dam Height |
35 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.5 |
Drainage Area |
0.42 |
Nid Storage |
55 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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 3-2