East Fork Grand River Watershed Site A-53 Reservoir Report
Last Updated: December 12, 2025
Located in Union County, Iowa, the East Fork Grand River Watershed Site A-53 is a vital infrastructure managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
Designed by the USDA NRCS, this flood risk reduction structure is an earth type dam that stands at a height of 23 feet and spans 594 feet in length. Completed in 2008, it serves the primary purpose of flood risk reduction for the TR-East Fork Grand River, with a storage capacity of 94 acre-feet and a drainage area of 0.27 square miles.
With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in managing water flow in the area. While it has not been rated for condition assessment and lacks emergency preparedness measures such as an EAP, the East Fork Grand River Watershed Site A-53 remains a key component in the local water resource management system. As climate change continues to impact weather patterns and increase the frequency of extreme events, structures like this will be essential in safeguarding communities from potential flooding incidents.
As part of the Rock Island District, this dam underscores the importance of collaboration between federal, state, and local agencies in ensuring the safety and resilience of water infrastructure. With its strategic location and significant impact on flood control in the region, the East Fork Grand River Watershed Site A-53 stands as a testament to the ongoing efforts to adapt to a changing climate and protect valuable water resources for future generations.
Year Completed |
2008 |
Dam Length |
594 |
Dam Height |
23 |
River Or Stream |
TR- EAST FORK GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
6.4 |
Drainage Area |
0.27 |
Nid Storage |
94 |
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-53