West Fork #3 Subwtrshd Sta 37+14 #9 Reservoir Report
Last Updated: December 14, 2025
West Fork #3 Subwtrshd Sta 37+14 #9, located in Woodbury County, Iowa, is a dam designed by the USDA NRCS in 1961 for fire protection, stock, small fish pond, and flood risk reduction purposes.
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Summary
This earth dam stands at 55 feet in height and spans 498 feet in length, with a storage capacity of 78 acre-feet and a drainage area of 0.53 square miles. The dam is under the regulatory jurisdiction of the Iowa Department of Natural Resources, with inspection, permitting, and enforcement responsibilities falling under state authority.
Despite being categorized as having a low hazard potential and a moderate risk assessment, West Fork #3 Subwtrshd Sta 37+14 #9 has not been rated for its condition assessment. The dam has not been modified since its completion and lacks certain emergency preparedness measures, such as an Emergency Action Plan (EAP) and inundation maps. While the dam is not federally owned or funded, it is operated by the local government and serves as a vital infrastructure for the community of Rolly Springs, providing essential water resource management for agricultural and fire protection needs in the area.
Year Completed |
1961 |
Dam Length |
498 |
Dam Height |
55 |
River Or Stream |
TR-WEST FORK LITTLE SIOUX RIV |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.53 |
Nid Storage |
78 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
55 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15100cfs |
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Perry Creek Near Milnerville
|
25cfs |
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.
West Fork #3 Subwtrshd Sta 37+14 #9