East Fork Grand River Watershed Site D-31 Reservoir Report
Last Updated: December 13, 2025
Located in Ringgold County, Iowa, the East Fork Grand River Watershed Site D-31 is a crucial structure designed by the USDA NRCS to reduce flood risk in the region.
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Summary
Completed in 2011, this earth-type dam stands at a height of 18 feet and spans a length of 560 feet, with a storage capacity of 67 acre-feet. With a low hazard potential and not yet rated for condition assessment, this dam plays a vital role in protecting the surrounding area from potential flooding events.
Managed by the local government and regulated by the Iowa Department of Natural Resources, the East Fork Grand River Watershed Site D-31 is equipped with a spillway width of 20 feet and a maximum discharge capacity of 154 cubic feet per second. Despite being non-USACE owned, this dam serves as a critical infrastructure for flood risk reduction in the region, providing a surface area of 5 acres and draining a 0.2 square mile watershed area. Although it has not been inspected in recent years, the dam remains operational and essential for preserving the safety and well-being of the community.
Situated in the State of MO, this dam contributes to the overall water resource management in the area by effectively mitigating flood risks and ensuring the resilience of the local ecosystem. With a primary purpose of flood risk reduction, the East Fork Grand River Watershed Site D-31 stands as a testament to the collaborative efforts between federal and state agencies in safeguarding water resources and adapting to the challenges posed by climate change. As a key component of the watershed infrastructure, this dam exemplifies the importance of proactive measures in ensuring water security and environmental sustainability for future generations.
Year Completed |
2011 |
Dam Length |
560 |
Dam Height |
18 |
River Or Stream |
Tr to Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.2 |
Nid Storage |
67 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
18 |
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-31