Johnson Lake Dam Reservoir Report
Nearby: Thompson Lake Dam Birnbaum Lake Dam
Last Updated: December 18, 2025
Johnson Lake Dam, located in St.
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Summary
Charles, Missouri, is a private earth dam completed in 1970 primarily for recreational purposes. The dam, standing at a height of 20 feet, has a storage capacity of 96 acre-feet and serves as a popular spot for water enthusiasts in the area. Despite its low hazard potential, the dam has not been rated for its condition and lacks certain emergency preparedness measures.
Situated on the TR-Sams Creek, Johnson Lake Dam offers a serene water source covering 9 acres with a drainage area of 210 acres. The dam's structure, with a buttress core type, provides a safe and enjoyable environment for visitors engaging in recreational activities such as fishing, boating, and picnicking. The dam's location in the Kansas City District adds to its appeal as a destination for water resource and climate enthusiasts looking to explore diverse aquatic ecosystems.
While Johnson Lake Dam may not be subject to state regulation or inspection, its contribution to local water management and conservation efforts cannot be understated. As a privately-owned recreational facility, the dam serves as a vital resource for both residents and visitors seeking to connect with nature and enjoy the benefits of sustainable water infrastructure. With its scenic surroundings and potential for outdoor recreation, Johnson Lake Dam stands as a testament to the importance of preserving water resources for future generations to appreciate and enjoy.
Year Completed |
1970 |
Dam Height |
20 |
River Or Stream |
TR-SAMS CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
210 |
Nid Storage |
96 |
Structural Height |
20 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Johnson Lake Dam