East Fork Grand River Dam G- 56 Reservoir Report
Last Updated: December 17, 2025
East Fork Grand River Dam G-56, located in Denver, Missouri, is a key infrastructure designed by the USDA NRCS to reduce flood risks along the East Fork of Grand River.
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Summary
Completed in 2002, this earth dam stands at a height of 30 feet, with a hydraulic height of 30 feet and a structural height of 41 feet. It spans a length of 615 feet and has a storage capacity of 123 acre-feet, providing crucial flood risk reduction measures for the region.
With a spillway width of 40 feet and a maximum discharge capacity of 221 cubic feet per second, East Fork Grand River Dam G-56 plays a vital role in managing water flow during heavy rain events. Despite its low hazard potential and moderate risk rating, the dam has not been assessed for its condition, indicating a need for further evaluation and potential risk management measures. The dam is not regulated by the state and does not have a designated emergency action plan, highlighting the importance of ongoing monitoring and preparedness for any unforeseen events.
As part of the Rock Island District, East Fork Grand River Dam G-56 serves as a critical piece of infrastructure for flood control in Worth County, Missouri. With its strategic location and design specifications, this dam plays a crucial role in protecting the surrounding area from potential water-related disasters. Enthusiasts of water resources and climate will find East Fork Grand River Dam G-56 to be a fascinating example of engineering ingenuity and the importance of effective water management practices in mitigating natural hazards.
Year Completed |
2002 |
Dam Length |
615 |
Dam Height |
30 |
River Or Stream |
EAST FORK OF GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
30 |
Drainage Area |
99.84 |
Nid Storage |
123 |
Structural Height |
41 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
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 Dam G- 56