West Sunnyside Watershed Site C-5 Reservoir Report
Last Updated: December 14, 2025
Located in Plymouth County, Iowa, the West Sunnyside Watershed Site C-5 is a crucial water resource managed by the local government.
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Summary
This site, designed by the USDA NRCS, serves multiple purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction. Completed in 1973, the earth dam stands at a height of 29 feet and has a storage capacity of 68 acre-feet, providing vital water management in the region.
With a low hazard potential and a moderate risk assessment rating, the West Sunnyside Watershed Site C-5 plays a key role in mitigating potential flooding events and ensuring the safety and security of the surrounding community. The dam, situated on TR-Broken Kettle Creek, is regulated and inspected by the Iowa DNR, with state permitting, inspection, and enforcement in place. The site's location in Sioux City makes it a critical infrastructure for water resource and climate enthusiasts to monitor and protect.
As part of the Omaha District, the West Sunnyside Watershed Site C-5 stands as a testament to the collaborative efforts between local and federal agencies in safeguarding water resources. With a capacity of 45 acre-feet for normal storage and a surface area of 4.7 acres, this site serves as a model for sustainable water management practices. As climate change continues to impact water resources, the importance of sites like West Sunnyside Watershed Site C-5 in maintaining water security and resilience cannot be understated.
Year Completed |
1973 |
Dam Length |
368 |
Dam Height |
29 |
River Or Stream |
TR-BROKEN KETTLE CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.7 |
Drainage Area |
0.61 |
Nid Storage |
68 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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-5