East Fork Grand River Watershed Site D-58 Reservoir Report
Last Updated: December 12, 2025
Located in Ringgold, Iowa, the East Fork Grand River Watershed Site D-58 is a local government-owned flood risk reduction structure designed by the USDA NRCS.
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Summary
Completed in 2005, this earth dam stands at 25 feet high and spans 540 feet in length, providing a storage capacity of 68 acre-feet. With a primary purpose of flood risk reduction, the dam serves the TR-South Creek and is regulated by the Iowa Department of Natural Resources.
The site's hazard potential is rated as low, with a moderate risk assessment score of 3. While the condition assessment is not rated, the structure has not been modified since its completion. Despite lacking specific emergency action plan details, the East Fork Grand River Watershed Site D-58 meets regulatory guidelines and is inspected, permitted, enforced, and managed by state authorities. With its strategic location and design, this watershed site plays a crucial role in managing water resources and mitigating flood risks in the region.
Enthusiasts of water resources and climate will find the East Fork Grand River Watershed Site D-58 a fascinating example of effective flood risk reduction infrastructure. With its earth dam construction and low hazard potential, this structure demonstrates the importance of proactive measures in managing water resources and protecting communities from potential disasters. As a key component in the local government's flood control efforts, this site showcases the collaborative efforts between state agencies and federal designers in safeguarding the environment and enhancing water resilience in the area.
Year Completed |
2005 |
Dam Length |
540 |
Dam Height |
25 |
River Or Stream |
TR-South Creek |
Primary Dam Type |
Earth |
Surface Area |
4 |
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.
East Fork Grand River Watershed Site D-58
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