College Corner Subwatershed Site 4-2 Reservoir Report
Last Updated: December 14, 2025
College Corner Subwatershed Site 4-2 in Woodbury County, Iowa is a vital water resource managed by the local government and regulated by the Iowa DNR.
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Summary
This earth dam, completed in 1966, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a dam height of 28 feet and a storage capacity of 100 acre-feet, it plays a crucial role in managing the flow of TR-Wolf Creek and protecting the surrounding area from potential hazards.
Located in Turin, Iowa, this low hazard potential dam has not been rated for its condition assessment, but is inspected, permitted, and enforced by state agencies. The dam's spillway type is uncontrolled, and it has a moderate risk assessment rating. Despite its age, College Corner Subwatershed Site 4-2 continues to serve its intended purpose effectively, providing essential water management services to the community. With its strategic location and design, the dam plays a crucial role in maintaining the ecological balance and protecting the local environment from potential risks.
Managed by the USDA NRCS, this site showcases the importance of sustainable water resource management in the face of changing climate patterns. As water resource and climate enthusiasts, it is imperative to monitor and support initiatives like College Corner Subwatershed Site 4-2 to ensure the long-term health and resilience of our water systems. Through collaboration with local and state agencies, this dam continues to be a valuable asset in protecting the environment and supporting the community's water needs in a sustainable manner.
Year Completed |
1966 |
Dam Length |
542 |
Dam Height |
28 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.59 |
Nid Storage |
100 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River Near Turin
|
1040cfs |
Missouri River At Decatur
|
14900cfs |
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.
College Corner Subwatershed Site 4-2