Grant Lake Dam - South Reservoir Report
Nearby: K & K Producers Grant Lake Dam-North
Last Updated: December 6, 2025
Grant Lake Dam - South, located in Platte City, Missouri, was completed in 1956 for the primary purpose of flood risk reduction along the TR-Platte River.
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Summary
This private-owned earth dam stands at a height of 20 feet and has a storage capacity of 86 acre-feet, with a normal storage level of 40 acre-feet. The dam also serves purposes such as debris control, fire protection, and recreation, making it a multifunctional structure in the region.
Despite its important role in flood risk management, Grant Lake Dam - South has a high hazard potential and is currently not rated for its condition. As a non-Federal structure, it is not regulated by the state or inspected regularly. The dam's emergency action plan status, risk assessment, and inundation maps preparedness are also unknown, raising concerns about the readiness for potential emergencies. With its location in a high-risk area, it is crucial for stakeholders to prioritize the assessment and maintenance of this vital infrastructure to ensure the safety of surrounding communities and the sustainability of water resources in the region.
With its strategic location in Buchanan County, Missouri, Grant Lake Dam - South plays a crucial role in managing flood risks along the TR-Platte River and supporting various activities such as recreation and stock pond management. As climate change continues to impact water resources and weather patterns, the importance of maintaining and enhancing infrastructure like this dam becomes even more evident. By prioritizing inspections, risk assessments, and emergency preparedness measures, stakeholders can ensure the long-term resilience of Grant Lake Dam - South and its ability to support water resource management and climate adaptation efforts in the region.
Year Completed |
1956 |
Dam Height |
20 |
River Or Stream |
TR-PLATTE RIVER |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
200 |
Nid Storage |
86 |
Structural Height |
20 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Platte River Near Agency
|
85cfs |
Missouri River At St. Joseph
|
24600cfs |
Platte River At Sharps Station
|
87cfs |
Little Platte River At Smithville
|
14cfs |
Little Platte River Near Plattsburg
|
1cfs |
Stranger C Nr Potter
|
199cfs |
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.
Grant Lake Dam - South