Six Mile Lane Lake Dam Reservoir Report
Last Updated: December 14, 2025
Six Mile Lane Lake Dam, located in Plattsburg, Missouri, was completed in 1958 and serves as both a recreational spot and a water supply source.
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Summary
The dam, designed by RIDDLE, is classified as an earth dam with a height of 37 feet and a length of 1150 feet. It has a normal storage capacity of 402 acre-feet and a maximum discharge rate of 5230 cubic feet per second, making it a crucial structure for managing water resources in the area.
Despite being privately owned, Six Mile Lane Lake Dam falls under state regulations, with inspections, permitting, and enforcement all being conducted by the DAM AND RESERVOIR SAFETY PROG in Missouri. The dam's condition was last assessed as satisfactory in 2007, with a high hazard potential due to its proximity to the TRIB-HORSE FORK river. The risk assessment for the dam is moderate, and it has a designated emergency action plan in place, although details on its compliance with guidelines and preparedness for emergencies are not specified.
In terms of its impact on the surrounding environment and community, Six Mile Lane Lake Dam poses both benefits and risks. It provides recreational opportunities and water supply, but its high hazard potential necessitates careful monitoring and maintenance to ensure the safety and well-being of residents living downstream. For water resource and climate enthusiasts, this dam serves as a focal point for understanding the complex interplay between human infrastructure, natural water systems, and the need for sustainable management practices in the face of changing environmental conditions.
Year Completed |
1958 |
Dam Length |
1150 |
Dam Height |
37 |
River Or Stream |
TRIB-HORSE FORK |
Primary Dam Type |
Earth |
Surface Area |
50 |
Drainage Area |
1000 |
Nid Storage |
865 |
Structural Height |
37 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
37 |
Seasonal Comparison
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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.
Six Mile Lane Lake Dam