East Fork Grand River Watershed Site A-51 Reservoir Report
Last Updated: December 13, 2025
East Fork Grand River Watershed Site A-51 is a Grade Stabilization dam located in Ringgold County, Iowa, along the Tr- East Fork Grand River.
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Summary
Constructed in 2001 by the USDA NRCS, this earth dam stands at 26 feet high and spans 556 feet in length, with a storage capacity of 152 acre-feet and a drainage area of 0.45 square miles. The primary purpose of this dam is to prevent erosion and stabilize the grade of the river, contributing to the overall health and sustainability of the watershed.
Managed by the Iowa Department of Natural Resources, this dam is regulated, permitted, inspected, and enforced by state authorities. Despite its low hazard potential and moderate risk assessment, the condition of the dam is currently not rated. As part of the Rock Island District, this site plays a crucial role in managing water resources in the region, with a spillway width of 1 foot and uncontrolled spillway type. While the dam has not been modified in recent years, it is important to ensure that emergency action plans are in place and meet necessary guidelines for effective risk management.
Water resource and climate enthusiasts will find East Fork Grand River Watershed Site A-51 to be a fascinating case study in sustainable water management practices. With its strategic location, design, and purpose, this dam serves as a vital infrastructure asset for the local government in Ringgold County, Iowa. As efforts continue to assess and maintain the condition of the dam, it remains a key player in protecting the surrounding environment, communities, and water resources from erosion and flood risks along the East Fork Grand River.
Year Completed |
2001 |
Dam Length |
556 |
Dam Height |
26 |
River Or Stream |
Tr- East Fork Grand River |
Primary Dam Type |
Earth |
Surface Area |
8.1 |
Drainage Area |
0.45 |
Nid Storage |
152 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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-51