East Fork Grand River Site B-61 Reservoir Report
Last Updated: December 14, 2025
East Fork Grand River Site B-61 is a local government-owned structure located in Ringgold County, Iowa, along a tributary to the East Fork Grand River.
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Summary
Designed by the USDA NRCS and completed in 2010, this earth dam stands at a height of 33 feet and has a length of 465 feet, providing flood risk reduction for the surrounding area. With a storage capacity of 124 acre-feet and a surface area of 6 acres, the dam serves multiple purposes including fish and wildlife habitat, grade stabilization, and recreation.
Managed by the Iowa DNR, East Fork Grand River Site B-61 is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. Despite being rated as having a low hazard potential and not yet assessed for condition, the dam plays a crucial role in protecting the local community from flooding events. The structure's emergency action plan status, risk assessment, and management measures remain unclear, highlighting the need for ongoing monitoring and maintenance to safeguard water resources and climate resilience in the region.
Year Completed |
2010 |
Dam Length |
465 |
Dam Height |
33 |
River Or Stream |
Trib to E. Fork Grand River |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.41 |
Nid Storage |
124 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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 Site B-61