Swantner Lake Dam Reservoir Report
Nearby: Anderson Lake Dam Emmett Brison Dam
Last Updated: December 22, 2025
Swantner Lake Dam, located in Pacific, Missouri, was completed in 1969 for the primary purpose of recreation.
°F
°F
mph
Wind
%
Humidity
Summary
This private earth dam stands at a height of 32 feet and has a storage capacity of 137 acre-feet. Situated on the TR to Calvey Cr river, the dam covers a surface area of 8 acres and serves a drainage area of 32 square miles. Despite not being regulated by the state, the dam is classified as having a high hazard potential, although its condition assessment is currently listed as "not rated."
Owned privately and with no state jurisdiction, Swantner Lake Dam raises concerns about its emergency preparedness and risk management measures. Although the dam has not been inspected or rated recently, its high hazard potential calls for a closer look at its safety protocols and emergency action plans. With a lack of information on its risk assessment, inundation maps, and emergency contact updates, there is a need for increased oversight and monitoring to ensure the safety of the surrounding community and water resources.
For water resource and climate enthusiasts, Swantner Lake Dam presents an intriguing case study in the intersection of private ownership, recreation, and dam safety. With its location in Franklin County, Missouri, and its high hazard potential, there is a pressing need for updated inspections, condition assessments, and emergency preparedness measures to mitigate potential risks to the environment and surrounding areas. As discussions around water resource management and climate resilience continue to gain importance, the case of Swantner Lake Dam serves as a reminder of the importance of proactive monitoring and maintenance in ensuring the safety and sustainability of our water infrastructure.
Year Completed |
1969 |
Dam Height |
32 |
River Or Stream |
TR TO CALVEY CR |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
32 |
Nid Storage |
137 |
Structural Height |
32 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big River At Byrnesville
|
176cfs |
Meramec River At Pacific
|
557cfs |
Big River Near Richwoods
|
174cfs |
Bourbeuse River At Union
|
73cfs |
Meramec River Near Eureka
|
858cfs |
Kiefer Creek Near Ballwin
|
1cfs |
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.
Swantner Lake Dam