College Corner Subwatershed Site 4-3 Reservoir Report
Last Updated: December 14, 2025
College Corner Subwatershed Site 4-3, located in Woodbury County, Iowa, is a small earth dam constructed in 1967 by the USDA NRCS for fire protection, stock, and small fish pond purposes.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, standing at a height of 29 feet with a length of 483 feet, has a storage capacity of 74 acre-feet and serves to reduce flood risks in the area. Situated along TR-Wolf Creek, this dam is regulated by the Iowa DNR and undergoes regular state inspections, enforcement, and permitting processes to ensure its functionality and safety.
With a low hazard potential and a moderate risk assessment score of 3, College Corner Subwatershed Site 4-3 contributes to the overall water resource management efforts in the region. The dam's primary purpose, in addition to flood risk reduction, highlights its importance in providing essential services for fire protection and recreational fishing activities. Despite its relatively small surface area of 1.7 acres and drainage area of 1.4 acres, this dam plays a crucial role in maintaining water quality and mitigating potential downstream impacts during heavy rain events.
Owned and regulated by the local government, College Corner Subwatershed Site 4-3 is a key infrastructure asset in the area, demonstrating the collaborative efforts between various agencies to manage water resources effectively. As climate change continues to impact the region, the importance of such dams in ensuring water security and resilience against extreme weather events cannot be overstated. The dam's presence along TR-Wolf Creek not only enhances the local ecosystem but also serves as a valuable resource for the community's water needs and environmental sustainability goals.
Year Completed |
1967 |
Dam Length |
483 |
Dam Height |
29 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
1.7 |
Drainage Area |
1.4 |
Nid Storage |
74 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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 4-3