East Fork Grand River F-4 Dam Reservoir Report
Last Updated: December 16, 2025
East Fork Grand River F-4 Dam, located in Allendale, Missouri, was completed in 2004 with the primary purpose of flood risk reduction along the Adams Branch.
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Summary
Owned by the local government, this earth dam stands at a height of 41 feet and has a hydraulic height of 28 feet, with a storage capacity of 880 acre-feet and a normal storage of 163 acre-feet. The dam covers a surface area of 19.8 acres and has a drainage area of 1090 acres, with a maximum discharge capacity of 3200 cubic feet per second.
Managed by the USDA NRCS, the East Fork Grand River F-4 Dam is regulated by the DAM AND RESERVOIR SAFETY PROG in Missouri. With a low hazard potential and a satisfactory condition assessment, the dam has been inspected every 5 years, with the last inspection conducted in July 2015. Despite its moderate risk level, appropriate risk management measures are in place to ensure the safety and integrity of the structure. This dam serves as a critical infrastructure for flood control in the area and plays a key role in protecting the surrounding communities from potential water-related disasters.
Year Completed |
2004 |
Dam Length |
1000 |
Dam Height |
41 |
River Or Stream |
ADAMS BRANCH |
Primary Dam Type |
Earth |
Surface Area |
19.8 |
Hydraulic Height |
28 |
Drainage Area |
1090 |
Nid Storage |
880 |
Structural Height |
41 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
41 |
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 F-4 Dam