East Fork Grand River Dam F- 46 Reservoir Report
Last Updated: December 16, 2025
East Fork Grand River Dam F-46, located in Harrison, Missouri, was completed in 2006 by the USDA NRCS and serves as a crucial flood risk reduction structure along the East Fork Grand River.
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Summary
This earth dam stands at 27 feet tall with a structural height of 35 feet and a length of 700 feet, providing storage capacity of 129.9 acre-feet. Despite its low hazard potential and moderate risk assessment, the dam has not been rated for its condition and lacks emergency action preparedness measures.
Owned and operated by the local government, this dam plays a vital role in protecting the surrounding area from potential flooding events. With a drainage area of 121.6 square miles and a maximum discharge rate of 276 cubic feet per second, the dam contributes to the overall water resource management in the region. While it currently does not have a state regulatory jurisdiction, the dam's primary purpose of flood risk reduction underscores its importance in safeguarding the community against water-related disasters.
As an enthusiast of water resources and climate, the East Fork Grand River Dam F-46 presents an intriguing case study in dam infrastructure and management. From its construction by the USDA NRCS to its flood risk reduction capabilities and limited regulatory oversight, this dam raises questions about the resilience and sustainability of water management practices in the face of changing climate conditions. Further research and monitoring of this dam could provide valuable insights into enhancing its safety and effectiveness in mitigating flood risks in the region.
Year Completed |
2006 |
Dam Length |
700 |
Dam Height |
27 |
River Or Stream |
EAST FORK GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
27 |
Drainage Area |
121.6 |
Nid Storage |
129.9 |
Structural Height |
35 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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 Dam F- 46