Wolf Creek Subwatershed Site M-2 Reservoir Report
Last Updated: December 14, 2025
Wolf Creek Subwatershed Site M-2, located in Woodbury County, Iowa, is a key water resource infrastructure managed by the local government and designed by the USDA NRCS.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam, constructed in 1971, serves multiple purposes including fire protection, stock management, and small fish pond creation, as well as flood risk reduction. With a height of 30 feet and a length of 711 feet, the dam has a storage capacity of 174 acre-feet and covers a surface area of 10.5 acres.
The dam is regulated by the Iowa Department of Natural Resources and is subject to state permitting, inspection, and enforcement. Despite having a low hazard potential and a moderate risk assessment rating, the condition of the dam is currently not rated. The spillway type is uncontrolled, and there are no outlet gates or associated structures. While the dam has not been modified in recent years, it remains a crucial component of the Wolf Creek watershed, providing essential water management functions for the surrounding area.
Overall, Wolf Creek Subwatershed Site M-2 plays a vital role in water resource management in the region, serving as a resilient infrastructure for flood risk reduction and water storage. As climate change impacts water availability and quality, the proper maintenance and monitoring of dams like Site M-2 are essential to ensure the safety and sustainability of water resources for future generations. With its multiple purposes and regulatory oversight, this dam stands as a testament to the importance of integrated water resource management in the face of a changing climate.
Year Completed |
1971 |
Dam Length |
711 |
Dam Height |
30 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
10.5 |
Drainage Area |
1.16 |
Nid Storage |
174 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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
|
13700cfs |
Perry Creek Near Milnerville
|
25cfs |
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 M-2