Fred Mayes Lake Dam Reservoir Report
Nearby: Wilkerson Dam West Town Lake Dam
Last Updated: December 15, 2025
Fred Mayes Lake Dam, located in Duncan's Bridge, Missouri, serves as a vital structure for fish and wildlife pond management.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1977, this earth dam stands at a height of 30 feet and spans 458 feet in length. With a storage capacity of 122 acre-feet and a surface area of 5 acres, the dam plays a crucial role in fire protection, stock, and small fish pond management, as well as grade stabilization and recreational activities.
Despite its low hazard potential, the dam is rated as not assessed for condition and poses a moderate risk (3) due to its lack of emergency action preparedness and inundation maps. While it is not regulated by the state and does not require permitting or inspection, its strategic location on the TR-Middle Fork Salt River makes it an integral part of the water resource infrastructure in Monroe County, Missouri. The dam's role in supporting the local ecosystem and providing recreational opportunities makes it a valuable asset for both the community and the environment.
With its primary purpose of enhancing fish and wildlife habitat, Fred Mayes Lake Dam stands as a testament to the importance of sustainable water resource management. As climate enthusiasts and water conservation advocates continue to prioritize the preservation of natural ecosystems, structures like this dam play a crucial role in maintaining the delicate balance of our environment. Its significance in supporting biodiversity and recreational activities underscores the need for continued monitoring and maintenance to ensure its long-term sustainability and resilience in the face of changing environmental conditions.
Year Completed |
1977 |
Dam Length |
458 |
Dam Height |
30 |
River Or Stream |
TR-MIDDLE FORK SALT RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
30 |
Drainage Area |
172.8 |
Nid Storage |
122 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Tenino City Park
|
||
Millersylvania State Park
|
||
Millersylvania State Park Campground
|
||
American Heritage Campground
|
Fred Mayes Lake Dam
Boat Launch Road Thurston County