East Fork Grand River Watershed Site A-73 Reservoir Report
Last Updated: December 13, 2025
Located in Ringgold County, Iowa, the East Fork Grand River Watershed Site A-73 is a grade stabilization structure designed by the USDA NRCS in 2001.
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Summary
This earth dam stands at 27 feet high and spans 537 feet in length, with a storage capacity of 63 acre-feet. The primary purpose of this structure is to control erosion and stabilize the grade of the Tr- East Fork Grand River, making it a crucial asset for water resource management in the area.
Managed by the Iowa Department of Natural Resources, this dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment rating, the East Fork Grand River Watershed Site A-73 plays a key role in mitigating flood risks and protecting the surrounding area from potential water-related disasters. Despite not being condition-rated, this structure serves as a vital component of the local water infrastructure.
As part of the Rock Island District, this site is not operated by the US Army Corps of Engineers, but it remains a significant feature in the local water management system. With its strategic location and purposeful design, the East Fork Grand River Watershed Site A-73 stands as a testament to the collaborative efforts of various agencies in safeguarding water resources and addressing climate challenges in the region.
Year Completed |
2001 |
Dam Length |
537 |
Dam Height |
27 |
River Or Stream |
Tr- East Fork Grand River |
Primary Dam Type |
Earth |
Surface Area |
3.4 |
Drainage Area |
0.18 |
Nid Storage |
63 |
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-73