Neustrom Subwatershed Site 11-2 Reservoir Report
Last Updated: December 14, 2025
Neustrom Subwatershed Site 11-2, located in Woodbury, Iowa, is a vital water resource managed by the local government for multiple purposes including fire protection, stock, and small fish pond, as well as flood risk reduction.
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Summary
Built in 1977 by USDA NRCS, this earth dam stands at a height of 37 feet and spans 550 feet in length, providing a storage capacity of 64 acre-feet and covering a surface area of 3.8 acres. The dam, situated along TR-WOLF CREEK, is regulated by the Iowa DNR and has a low hazard potential with a moderate risk assessment rating.
Despite not being rated for condition assessment, Neustrom Subwatershed Site 11-2 has a solid foundation of soil and serves as a reliable water management infrastructure in the region. This site, operated and maintained by the Natural Resources Conservation Service, plays a crucial role in water retention and flood control efforts along the Little Sioux River. While the dam's spillway is uncontrolled, its design ensures effective water discharge and management during high flow events, contributing to the overall resilience of the local water system.
With a focus on environmental sustainability and water resource management, Neustrom Subwatershed Site 11-2 is a key asset in the region's infrastructure for water conservation and flood risk mitigation. Supported by state and federal agencies, this earth dam serves as a testament to collaborative efforts in safeguarding water resources and ensuring the safety and well-being of local communities in Iowa.
Year Completed |
1977 |
Dam Length |
550 |
Dam Height |
37 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.8 |
Drainage Area |
0.6 |
Nid Storage |
64 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
37 |
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
|
15100cfs |
Omaha Cr At Homer
|
45cfs |
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.
Neustrom Subwatershed Site 11-2