Four Winds Way Dam Reservoir Report
Last Updated: December 5, 2025
Four Winds Way Dam, located in Washington, Missouri, was completed in 1972 and serves primarily as a recreational facility.
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Summary
This privately-owned dam stands at a height of 31 feet with a storage capacity of 199 acre-feet. Situated on the TR-MINERAL FORK-BIG RIVER, the dam covers a surface area of 12 acres and has a drainage area of 1585 square miles.
Despite its recreational purpose, Four Winds Way Dam is classified as having a high hazard potential, although its condition assessment is currently not rated. With no state regulation or inspection in place, the dam's emergency action plan status and risk assessment remain unspecified. The dam's unique design as a rockfill type with a buttress core adds to its structural integrity, while its location in Kansas City District further enhances its importance in the region for water resource and climate enthusiasts.
Year Completed |
1972 |
Dam Height |
31 |
River Or Stream |
TR-MINERAL FORK-BIG RIVER |
Primary Dam Type |
Rockfill |
Surface Area |
12 |
Drainage Area |
1585 |
Nid Storage |
199 |
Structural Height |
31 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big River Near Richwoods
|
221cfs |
Meramec River Near Sullivan
|
522cfs |
Big River At Irondale
|
27cfs |
Big River Below Desloge
|
59cfs |
Big River At Byrnesville
|
241cfs |
Meramec River Near Steelville
|
244cfs |
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.
Four Winds Way Dam