St Fork Grand River Wtrshd Site D-58 Reservoir Report
Last Updated: December 12, 2025
Located in Ringgold County, Iowa, the St Fork Grand River Watershed Site D-58 is a crucial infrastructure designed by NRCS in 2006 for flood risk reduction along the TR- South Creek.
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Summary
This earth dam stands at a height of 25 feet and stretches 505 feet in length, providing a storage capacity of 68 acre-feet to mitigate potential flooding in the region. With a low hazard potential and moderate risk assessment, this dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections, permitting, and enforcement to ensure its structural integrity and effectiveness in managing water resources in the area.
Managed by the local government, this dam plays a vital role in safeguarding the surrounding community from the impacts of flooding, with a primary purpose focused on flood risk reduction. Despite its modest size and uncontrolled spillway type, St Fork Grand River Watershed Site D-58 serves as a critical component of the water resource management infrastructure in the region. With a surface area of 3.9 acres and a drainage area of 0.2 square miles, this dam provides essential protection against potential water overflow and contributes to the overall resilience of the local ecosystem.
As part of the Rock Island District, this dam is situated in an area overseen by Representative Cindy Axne (D) and serves as a key asset in the broader network of water resource management systems in Iowa. With its strategic location and state jurisdiction, the St Fork Grand River Watershed Site D-58 exemplifies the collaborative efforts between federal, state, and local agencies to address the challenges posed by climate change and ensure the sustainable management of water resources for the benefit of the community.
Year Completed |
2006 |
Dam Length |
505 |
Dam Height |
25 |
River Or Stream |
TR- SOUTH CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.9 |
Drainage Area |
0.2 |
Nid Storage |
68 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
St Fork Grand River Wtrshd Site D-58
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