East Fork Grand River Watershed Site A-78 Reservoir Report
Last Updated: December 13, 2025
East Fork Grand River Watershed Site A-78, located in Ringgold County, Iowa, is a vital 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 27 feet and spans 520 feet, providing a storage capacity of 148 acre-feet. With a primary purpose of flood risk reduction, this structure also serves as a fish and wildlife pond, grade stabilization, and recreational area, showcasing its multiple benefits to the local ecosystem and community.
Managed by the Iowa DNR, this site is regulated and permitted by state authorities, ensuring its compliance with safety and environmental standards. With a low hazard potential and a condition assessment of "Not Rated," East Fork Grand River Watershed Site A-78 remains a reliable infrastructure for water resource management in the region. Its location in SW,NE,S30,T70N,R28W, along the Tributary to East Fork Grand River, highlights its strategic placement for effective watershed management and flood control measures.
As part of the Rock Island District, this structure plays a crucial role in maintaining the ecological balance and water quality in the area. With its significant storage capacity, surface area of 9 acres, and drainage area of 0.49 square miles, East Fork Grand River Watershed Site A-78 serves as a key asset for sustainable water resource management and climate resilience efforts in the region.
Year Completed |
2010 |
Dam Length |
520 |
Dam Height |
27 |
River Or Stream |
Tr to E. Fork Grand River |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
0.49 |
Nid Storage |
148 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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 A-78