East Fork Grand River Watershed Site D-36 Reservoir Report
Last Updated: December 14, 2025
East Fork Grand River Watershed Site D-36 is a crucial flood risk reduction structure located in Ringgold County, Iowa.
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Summary
Managed by the local government and designed by the USDA NRCS, this Earth dam stands at a height of 23 feet and spans 465 feet in length. Completed in 2008, it serves the primary purpose of flood risk reduction, with a storage capacity of 137 acre-feet and a drainage area of 4.48 square miles.
Situated in the State of MO and regulated by the Iowa DNR, this dam on a tributary to Lotts Creek has a low hazard potential and a moderate risk assessment rating. Its spillway type is uncontrolled with a width of 1 foot, and it has not been rated for condition assessment. Despite not having an Emergency Action Plan in place, the structure meets regulatory guidelines and has not undergone recent modifications or inspections. The site's risk management measures and inundation maps are currently not documented, highlighting areas for potential improvement in emergency preparedness and response.
With its strategic location and role in mitigating flood risks in the region, East Fork Grand River Watershed Site D-36 stands as a vital asset for water resource and climate protection enthusiasts. As efforts continue to enhance its safety and emergency response protocols, this dam serves as a testament to the importance of sustainable water management practices in safeguarding communities and ecosystems against the impacts of extreme weather events.
Year Completed |
2008 |
Dam Length |
465 |
Dam Height |
23 |
River Or Stream |
Trib to Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
8.2 |
Drainage Area |
4.48 |
Nid Storage |
137 |
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-36