East Fork Grand River Watershed Site D-79 Reservoir Report
Last Updated: December 12, 2025
Located in the heart of the East Fork Grand River Watershed in Ringgold County, Iowa, Site D-79 is a vital piece of infrastructure designed by the USDA NRCS to address flood risk reduction in the region.
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Summary
Completed in 2006, this earth dam stands at 25 feet high and spans 510 feet in length, with a storage capacity of 77 acre-feet. The dam serves to protect the surrounding area from potential flooding events, ensuring the safety and well-being of local residents and ecosystems along Tr-South Creek.
Managed by the Iowa DNR, Site D-79 is subject to state regulations, inspections, and enforcement to maintain its structural integrity and functionality. Despite its low hazard potential, the dam is categorized as having moderate risk, highlighting the importance of ongoing risk assessment and management measures. With a primary purpose of flood risk reduction, this site plays a crucial role in safeguarding the community against the impacts of extreme weather events and changing climate patterns in the region.
As a key component of the East Fork Grand River Watershed, Site D-79 serves as a critical infrastructure asset for water resource management in the area. With its strategic location and design, this dam exemplifies the collaborative efforts between local government agencies and the USDA NRCS to enhance resilience and sustainability in the face of a changing climate. As water resource and climate enthusiasts, understanding and supporting initiatives like Site D-79 are essential for promoting long-term environmental stewardship and community well-being in the region.
Year Completed |
2006 |
Dam Length |
510 |
Dam Height |
25 |
River Or Stream |
Tr-South Creek |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.24 |
Nid Storage |
77 |
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-79
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