Big Coon Subwatershed Site L-3 Reservoir Report
Last Updated: December 14, 2025
Big Coon Subwatershed Site L-3, located in Correctionville, Iowa, is a strategically designed earth dam constructed in 1998 by the USDA NRCS with a primary purpose of fire protection, stock, or small fish pond, and flood risk reduction.
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Summary
The dam stands at a height of 22 feet and spans 700 feet, providing a storage capacity of 62 acre-feet. With a drainage area of 2.11 square miles and a surface area of 3.4 acres, this low-hazard structure on TR-Bacon Creek is crucial in managing water resources in Woodbury County.
Managed by the Iowa DNR and operated by local government, Big Coon Subwatershed Site L-3 serves as a vital component in the region's water management infrastructure. Despite its low hazard potential and moderate risk assessment, the dam's condition remains unrated. The site's location, NE, NE, S15, T088N, R42W, highlights its significance in protecting the surrounding environment and community from potential flooding events. With state-permitting, inspection, and enforcement in place, the dam plays a key role in ensuring water resource sustainability and climate resilience in the area.
Year Completed |
1998 |
Dam Length |
700 |
Dam Height |
22 |
River Or Stream |
TR- BACON CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.4 |
Drainage Area |
2.11 |
Nid Storage |
62 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Floyd River At James
|
187cfs |
Little Sioux River Near Turin
|
1040cfs |
Missouri River At Sioux City
|
13700cfs |
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.
Big Coon Subwatershed Site L-3