Grant Lake Dam-North Reservoir Report
Last Updated: December 6, 2025
Grant Lake Dam-North in Platte City, Missouri, is a privately owned rockfill dam completed in 1978 for the primary purpose of flood risk reduction.
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Summary
With a height of 20 feet and a storage capacity of 107 acre-feet, the dam also serves additional purposes such as debris control, fire protection, and small fish pond creation. Situated on the TR-Platte River within Buchanan County, the dam plays a crucial role in managing water resources and protecting the surrounding area from potential floods.
Although Grant Lake Dam-North is not regulated by the state of Missouri, its low hazard potential and good condition make it a reliable structure for flood risk management. The dam has not been rated for its condition assessment, and there is no emergency action plan in place as of the last data update in May 2018. Despite these gaps, the dam continues to provide essential services to the community and contributes to the overall resilience of the region's water infrastructure.
As part of the Rock Island District, Grant Lake Dam-North exemplifies the collaborative efforts between private owners and federal agencies in safeguarding water resources and mitigating flood risks. With its strategic location and multiple purposes, the dam stands as a testament to the importance of proactive infrastructure development in the face of changing climate patterns. For water resource and climate enthusiasts, Grant Lake Dam-North presents a case study in effective flood risk reduction and multi-functional dam design.
Year Completed |
1978 |
Dam Height |
20 |
River Or Stream |
TR-PLATTE RIVER |
Primary Dam Type |
Rockfill |
Surface Area |
10 |
Drainage Area |
590 |
Nid Storage |
107 |
Structural Height |
20 |
Hazard Potential |
Low |
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 Near Plattsburg
|
1cfs |
Little Platte River At Smithville
|
14cfs |
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-North