Lynch Lake Dam Reservoir Report
Last Updated: December 21, 2025
Lynch Lake Dam, located in Catawissa, Missouri, was completed in 1938 and serves as a recreational spot for water resource enthusiasts.
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Summary
This privately owned dam stands at a height of 26 feet and has a storage capacity of 70 acre-feet. The dam is situated on Winch Creek and covers a surface area of 5 acres, with a drainage area of 93 acres.
Despite its age, Lynch Lake Dam has not been inspected since August 1979 and is classified as having a high hazard potential. The dam's condition has not been rated, and there is no emergency action plan in place. This lack of recent inspection and assessment raises concerns about the dam's safety and potential risks associated with its operation.
With its rockfill design and primary purpose of recreation, Lynch Lake Dam presents an intriguing case study for water resource and climate enthusiasts. The dam's historical significance, coupled with its current condition and hazard potential, highlights the importance of regular inspections and maintenance to ensure the safety and integrity of our water infrastructure.
Year Completed |
1938 |
Dam Height |
26 |
River Or Stream |
WINCH CREEK |
Primary Dam Type |
Rockfill |
Surface Area |
5 |
Drainage Area |
93 |
Nid Storage |
70 |
Structural Height |
26 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Meramec River At Pacific
|
557cfs |
Big River At Byrnesville
|
176cfs |
Meramec River Near Eureka
|
858cfs |
Bourbeuse River At Union
|
73cfs |
Kiefer Creek Near Ballwin
|
1cfs |
Bonhomme Creek Near Ellisville
|
0cfs |
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.
Lynch Lake Dam