East Fork Grand River Watershed Site B-51 Reservoir Report
Last Updated: December 14, 2025
Located in Ringgold County, Iowa, the East Fork Grand River Watershed Site B-51 is a local government-owned site managed by the USDA NRCS.
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Summary
This flood risk reduction structure, completed in 2004, is designed to regulate water levels along the TR- East Fork Grand River. With a dam height of 31 feet and a length of 544 feet, the site has a storage capacity of 131 acre-feet and covers a surface area of 6.7 acres.
Managed by the Iowa DNR, the East Fork Grand River Watershed Site B-51 is regulated, permitted, inspected, and enforced by state agencies to ensure its structural integrity and proper functioning. The dam is primarily made of earth and sits on a soil foundation, with an uncontrolled spillway type. Although it is classified as having a low hazard potential, the site is considered to have a moderate risk level (3) based on a risk assessment.
For water resource and climate enthusiasts, the East Fork Grand River Watershed Site B-51 provides a fascinating example of sustainable water management practices in action. As a key component in flood risk reduction efforts, this structure plays a crucial role in protecting the surrounding area from potential water-related hazards. With its state-of-the-art design and regular inspections, the site showcases the importance of proactive measures in ensuring the safety and resilience of water infrastructure in the face of changing climate conditions.
Year Completed |
2004 |
Dam Length |
544 |
Dam Height |
31 |
River Or Stream |
TR- EAST FORK GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
6.7 |
Drainage Area |
0.46 |
Nid Storage |
131 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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 B-51