Brown Lake Dam Reservoir Report
Last Updated: December 22, 2025
Brown Lake Dam, located in Robertsville, Missouri, was completed in 1972 and serves as a crucial water resource for fire protection and as a stock or small fish pond.
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Summary
The dam stands at a height of 31 feet and has a storage capacity of 83 acre-feet, with a normal storage level of 29 acre-feet. The dam is classified as an earth dam with a buttress core type, situated on the SUB TRIB-PIN OAK CREEK.
Despite its importance, Brown Lake Dam has a high hazard potential and has not been inspected since August 1980. The dam's condition is currently not rated, and there is no emergency action plan prepared or updated. This raises concerns about the safety and maintenance of the structure, especially in the face of potential climate impacts such as increased precipitation and extreme weather events. For water resource and climate enthusiasts, Brown Lake Dam presents an intriguing case study of the intersection between infrastructure management, water resource sustainability, and climate resilience.
Year Completed |
1972 |
Dam Height |
31 |
River Or Stream |
SUB TRIB-PIN OAK CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
30 |
Nid Storage |
83 |
Structural Height |
31 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bourbeuse River At Union
|
71cfs |
Meramec River At Pacific
|
547cfs |
Bonhomme Creek Near Ellisville
|
0cfs |
Big River At Byrnesville
|
174cfs |
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.
Brown Lake Dam