East Fork Grand River Watershed Site D-73 Reservoir Report
Last Updated: December 12, 2025
East Fork Grand River Watershed Site D-73 is a crucial flood risk reduction structure located in Ringgold County, Iowa.
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Summary
Constructed in 2008 by the USDA NRCS, this earth dam stands at 23 feet tall and spans a length of 560 feet. With a storage capacity of 151 acre-feet, this dam plays a vital role in mitigating flood risks in the region, particularly along the tributary to South Creek.
Managed by the Iowa DNR, this dam is regulated, permitted, inspected, and enforced by state authorities to ensure its structural integrity and effectiveness. Despite its low hazard potential, the site has a moderate risk assessment level of 3, highlighting the importance of ongoing risk management measures. Situated in an area prone to flooding, the East Fork Grand River Watershed Site D-73 serves as a critical infrastructure for protecting local communities and ecosystems from the impacts of extreme weather events and changing climate conditions.
With its primary purpose being flood risk reduction, this dam stands as a testament to the collaborative efforts between local government agencies, federal designers, and state regulators in safeguarding water resources and enhancing climate resilience in the East Fork Grand River Watershed. As climate enthusiasts and water resource experts alike, understanding the intricacies of such structures is essential for promoting sustainable water management practices and adapting to the challenges posed by a changing climate.
Year Completed |
2008 |
Dam Length |
560 |
Dam Height |
23 |
River Or Stream |
Trib to South Creek |
Primary Dam Type |
Earth |
Surface Area |
10.2 |
Drainage Area |
0.48 |
Nid Storage |
151 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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-73