East Fork Grand River Watershed Site B-43 Reservoir Report
Last Updated: December 14, 2025
Located in the East Fork Grand River Watershed in Iowa, Site B-43 is a local government-owned earth dam designed by USDA NRCS for flood risk reduction.
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Summary
Completed in 2007, the dam stands at a height of 29 feet, with a length of 565 feet and a storage capacity of 142 acre-feet. The dam is regulated by the Iowa DNR and is equipped with an uncontrolled spillway with a width of 64 feet, ensuring effective water management during high-flow events.
With a hazard potential rated as low and a moderate risk assessment score of 3, the dam at Site B-43 plays a crucial role in mitigating flood risks in the area. Though the condition of the dam is currently listed as not rated, regular state inspections, permitting, and enforcement ensure its operational effectiveness. The data also indicates that the dam has not been modified in recent years, highlighting its stability and long-term reliability in protecting the surrounding community from potential water-related disasters.
Overall, East Fork Grand River Watershed Site B-43 is a vital piece of infrastructure in the area's water resource management system. With its strategic location and design for flood risk reduction, the dam serves as a key element in safeguarding the community against potential water-related hazards, reflecting a commitment to sustainable water management practices in the region.
Year Completed |
2007 |
Dam Length |
565 |
Dam Height |
29 |
River Or Stream |
Tr-Bealls Creek |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
0.5 |
Nid Storage |
142 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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-43