South Ridge Estates - South Dam Reservoir Report
Last Updated: December 14, 2025
South Ridge Estates - South Dam, located in Sioux Center, Iowa, is a privately owned earth dam built in 2007 by DeWild, Grant, Reckert & Associates.
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Summary
This dam, standing at a height of 11 feet and stretching 660 feet in length, serves the primary purpose of water retention along the Tr- West Branch Floyd River. With a storage capacity of 39 acre-feet and a surface area of 2.6 acres, the dam plays a crucial role in managing water resources in the region.
Regulated by the Iowa Department of Natural Resources, the South Ridge Estates - South Dam is classified as having a significant hazard potential. While the condition assessment is currently not rated, the risk assessment indicates a moderate risk level. The dam features an uncontrolled spillway with a width of 3 feet and is designed to handle a maximum discharge, ensuring the safety and stability of the structure during periods of high water flow. With its strategic location and functional design, this dam stands as a key component in the water management infrastructure of Sioux Center, Iowa.
As water resource and climate enthusiasts, it is essential to recognize the importance of dams like South Ridge Estates - South Dam in safeguarding communities against flooding and ensuring sustainable water usage. By understanding the regulatory measures in place, assessing risk levels, and promoting effective risk management practices, we can work towards enhancing the resilience of water infrastructure in the face of changing environmental conditions. The South Ridge Estates - South Dam serves as a vital asset in this endeavor, highlighting the intersection of engineering, environmental stewardship, and community safety in water resource management.
Year Completed |
2007 |
Dam Length |
660 |
Dam Height |
11 |
River Or Stream |
Tr- West Branch Floyd River |
Primary Dam Type |
Earth |
Surface Area |
2.6 |
Drainage Area |
0.12 |
Nid Storage |
39 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Floyd River At Alton
|
36cfs |
Rock River Near Rock Valley
|
321cfs |
Big Sioux River At Akron
|
816cfs |
Rock River Below Tom Creek At Rock Rapids
|
60cfs |
Perry Creek Near Milnerville
|
25cfs |
Floyd River At James
|
187cfs |
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.
South Ridge Estates - South Dam