Woodbury County Roadgrade Dam 30-88-43 Reservoir Report
Last Updated: December 13, 2025
Woodbury County Roadgrade Dam 30-88-43, located in Anthon, Iowa, is a local government-owned structure built in 1999 by NRCS with a primary purpose of fire protection, stock, or small fish pond.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam stands at a height of 38 feet and stretches 682 feet in length, providing a storage capacity of 75 acre-feet. Situated on the TR- Little Sioux River, the dam's low hazard potential and moderate risk assessment make it a crucial asset for water resource management in the area.
Managed by the Iowa DNR, this dam is state-regulated and undergoes regular inspections, permitting, and enforcement to ensure its structural integrity and safety. Despite being uncontrolled, the dam's spillway type and soil foundation contribute to its efficient operation and minimal risk to surrounding areas. With a drainage area of 0.52 square miles and a normal storage capacity of 34 acre-feet, Woodbury County Roadgrade Dam 30-88-43 plays a vital role in water conservation and management for the community.
For water resource and climate enthusiasts, Woodbury County Roadgrade Dam 30-88-43 offers a fascinating glimpse into the intersection of infrastructure, environmental protection, and community safety. With its strategic location, design features, and regulated operation, this dam serves as a valuable asset in mitigating flood risks, supporting local ecosystems, and ensuring sustainable water supply for the region. As a testament to collaboration between local government agencies and environmental experts, this dam stands as a model for responsible water resource management and climate resilience in Woodbury County, Iowa.
Year Completed |
1999 |
Dam Length |
682 |
Dam Height |
38 |
River Or Stream |
TR- LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.52 |
Nid Storage |
75 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
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 |
Little Sioux River Near Turin
|
1040cfs |
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.
Woodbury County Roadgrade Dam 30-88-43