West Sunnyside Watershed Site C-1 Reservoir Report
Last Updated: December 14, 2025
West Sunnyside Watershed Site C-1, located in Sioux City, Iowa, is a local government-owned dam designed by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
Completed in 1969, this earth dam stands at a height of 35 feet with a length of 672 feet, providing a storage capacity of 96 acre-feet. The dam, situated on TR-Broken Kettle Creek, serves to reduce flood risks for the area and is regulated by the Iowa DNR.
With a low hazard potential and a moderate risk assessment rating, West Sunnyside Watershed Site C-1 is an essential component of the water resource management in the Plymouth County area. The dam has a surface area of 4.7 acres and a drainage area of 0.56 square miles, contributing to the overall water management strategies in the region. While the condition assessment is not rated, the dam's role in emergency preparedness and risk management is crucial for ensuring the safety and protection of the surrounding communities.
As part of the Omaha District, West Sunnyside Watershed Site C-1 plays a vital role in the overall water infrastructure of the area, with a focus on fire protection, stock, and small fish pond purposes. With its strategic location and design, the dam contributes to flood risk reduction efforts and enhances the resilience of the local ecosystem. As water resource and climate enthusiasts, understanding the significance of this dam in the context of water management and climate adaptation is essential for promoting sustainable practices and safeguarding the environment for future generations.
Year Completed |
1969 |
Dam Length |
672 |
Dam Height |
35 |
River Or Stream |
TR-BROKEN KETTLE CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.7 |
Drainage Area |
0.56 |
Nid Storage |
96 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Perry Creek Near Milnerville
|
25cfs |
Big Sioux River At Akron
|
816cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
13700cfs |
Vermillion River Nr Vermillion Sd
|
33cfs |
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 Sunnyside Watershed Site C-1