East Fork Grand River Watershed Site D-55 Reservoir Report
Last Updated: December 12, 2025
Located in Ringgold County, Iowa, the East Fork Grand River Watershed Site D-55 is a flood risk reduction structure designed by the USDA NRCS and completed in 2010.
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Summary
This Earth dam stands at a height of 19 feet and spans 610 feet, with a storage capacity of 80 acre-feet. Situated on the Tr to Lotts Creek, this site plays a crucial role in mitigating flood risks in the area, with a maximum discharge capacity of 153 cubic feet per second.
Managed by the Iowa Department of Natural Resources, this low-hazard dam serves as a vital component in flood control efforts within the region. With state regulatory agencies overseeing its operation, inspection, and enforcement, the East Fork Grand River Watershed Site D-55 exemplifies a collaborative approach towards water resource management. Despite being designated as "Not Rated" in terms of condition assessment, this structure showcases the commitment to enhancing watershed resilience and protecting communities from the impacts of extreme weather events.
As climate change continues to pose challenges to water resources, the importance of structures like the East Fork Grand River Watershed Site D-55 cannot be overstated. With its strategic location and design, this flood risk reduction facility stands as a testament to the proactive measures taken to safeguard against the increasing threats of flooding in the region. As water resource and climate enthusiasts, understanding the significance of such infrastructure is crucial in promoting sustainable water management practices and building climate resilience for future generations.
Year Completed |
2010 |
Dam Length |
610 |
Dam Height |
19 |
River Or Stream |
Tr to Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.23 |
Nid Storage |
80 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
19 |
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-55