East Fork Grand River Watershed Site A-71 Reservoir Report
Last Updated: December 13, 2025
Located in the picturesque East Fork Grand River Watershed in Ringgold County, Iowa, Site A-71 is a key flood risk reduction structure designed and maintained by the USDA NRCS.
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Summary
Completed in 2006, this earth dam stands at 23 feet tall and spans 595 feet in length, with a storage capacity of 149 acre-feet. Situated along the Tr- East Fork Grand River, this site plays a crucial role in managing water flow and protecting the surrounding area from potential flooding.
Owned by the local government and regulated by the Iowa DNR, Site A-71 is subject to state permitting, inspection, and enforcement to ensure its functionality and safety. With a low hazard potential and a moderate risk assessment rating, this structure serves as a vital component in the overall flood risk reduction strategy for the region. Despite not being USACE-operated, Site A-71's strategic location and design make it an essential asset in safeguarding the community and environment from the impacts of extreme weather events and climate change.
As water resource and climate enthusiasts explore the East Fork Grand River Watershed, Site A-71 stands out as a notable example of effective flood risk reduction infrastructure. With its earth dam construction, stone core, and soil foundation, this site exemplifies the collaboration between federal, state, and local agencies in protecting critical water resources. As efforts continue to address the challenges posed by a changing climate, Site A-71 remains a cornerstone in the resilience and sustainability of the surrounding landscape.
Year Completed |
2006 |
Dam Length |
595 |
Dam Height |
23 |
River Or Stream |
Tr- East fk grand river |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
0.45 |
Nid Storage |
149 |
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 A-71