West Fork #3 Subwtrshd Sta 38+15 #6 Reservoir Report
Last Updated: December 13, 2025
West Fork #3 Subwtrshd Sta 38+15 #6 is a crucial water infrastructure located in Woodbury County, Iowa, designed by USDA NRCS in 1961 for fire protection, stock, and small fish pond purposes.
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Summary
This earth dam has a height of 27 feet and a length of 346 feet, providing a storage capacity of 67 acre-feet and covering a surface area of 4.6 acres. The dam is regulated by the Iowa DNR and is part of the TR-West Fork Little Sioux River watershed, serving as a flood risk reduction measure for the local community.
Despite its low hazard potential, the dam's condition remains unrated, highlighting the need for further assessment and potential risk management measures. The dam does not have controlled spillways or outlet gates, indicating its reliance on natural drainage systems. With a moderate risk assessment score of 3, there is a call for proactive emergency action plans and guidelines to ensure the safety and sustainability of this vital water resource infrastructure in Rolly Springs, Iowa. Enthusiasts of water resources and climate resilience will find West Fork #3 Subwtrshd Sta 38+15 #6 to be a key component in the local water management system with room for improvement in risk mitigation strategies.
Year Completed |
1961 |
Dam Length |
346 |
Dam Height |
27 |
River Or Stream |
TR-WEST FORK LITTLE SIOUX RIV |
Primary Dam Type |
Earth |
Surface Area |
4.6 |
Drainage Area |
0.76 |
Nid Storage |
67 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Floyd River At James
|
187cfs |
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Sioux City
|
15100cfs |
Little Sioux River At Correctionville
|
327cfs |
Omaha Cr At Homer
|
45cfs |
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.
West Fork #3 Subwtrshd Sta 38+15 #6