Ls Miller 4-3375 Reservoir Report
Last Updated: December 12, 2025
Ls Miller 4-3375, also known as Miller SWS, is a water resource structure located in Correctionville, Iowa, along the Tr- Little Sioux River.
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Summary
Owned by the local government and designed by USDA NRCS, this earth dam was completed in 1960 for the purpose of grade stabilization. Standing at a height of 32 feet and with a length of 250 feet, it has a storage capacity of 33 acre-feet and covers a drainage area of 0.31 square miles.
Managed and funded by the Natural Resources Conservation Service, Ls Miller 4-3375 serves as a vital component in the local water infrastructure, with a low hazard potential and a moderate risk assessment rating. The dam features an uncontrolled spillway and outlet gates, ensuring proper water flow regulation and flood protection for the surrounding area. While the condition assessment is currently unavailable, the structure continues to serve its intended purpose effectively, contributing to the overall water resource management efforts in Woodbury County, Iowa.
As an important piece of the water resource puzzle in the region, Ls Miller 4-3375 plays a crucial role in maintaining the ecological balance and water quality of the Tr- Little Sioux River. With its design and construction overseen by USDA NRCS and ongoing management by federal agencies, this earth dam stands as a testament to the collaborative efforts aimed at sustainable water resource management and climate resilience in the area. Its strategic location and purposeful design make it a key asset in the local water infrastructure, ensuring the safety and well-being of the community for years to come.
Year Completed |
1960 |
Dam Length |
250 |
Dam Height |
32 |
River Or Stream |
Tr- Little Sioux River |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.31 |
Nid Storage |
33 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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 |
Missouri River At Sioux City
|
15100cfs |
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.
Ls Miller 4-3375