Dresser Minerals #7 Dam South (Dry) Reservoir Report
Last Updated: December 5, 2025
Dresser Minerals #7 Dam South (Dry) in Washington, Missouri, is a privately owned structure built in 1950 primarily for tailings storage.
°F
°F
mph
Wind
%
Humidity
Summary
This rockfill dam stands at a height of 34.6 feet and spans a length of 4000 feet along TR-Mill Creek. With a storage capacity of 80 acre-feet, this dam has a surface area of 37 acres and serves a critical role in managing water resources in the region.
Despite its importance, Dresser Minerals #7 Dam South (Dry) has not been subject to state regulation or inspection since its last assessment in 1986. The dam is classified as having a high hazard potential and a moderate risk assessment, indicating the need for continued monitoring and maintenance to ensure its structural integrity. The lack of a current condition assessment raises concerns about the dam's resilience to extreme weather events, especially in the face of changing climate patterns.
As water resource and climate enthusiasts, it is crucial to recognize the significance of Dresser Minerals #7 Dam South (Dry) in the local ecosystem and the potential risks associated with its aging infrastructure. Advocating for increased regulatory oversight, regular inspections, and proactive risk management measures will be essential to safeguarding this dam and protecting the surrounding community from potential hazards in the future.
Year Completed |
1950 |
Dam Length |
4000 |
Dam Height |
34.6 |
River Or Stream |
TR-MILL CREEK |
Primary Dam Type |
Rockfill |
Surface Area |
37 |
Drainage Area |
37 |
Nid Storage |
80 |
Structural Height |
34.6 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big River At Irondale
|
27cfs |
Big River Below Desloge
|
59cfs |
Big River Near Richwoods
|
221cfs |
Meramec River Near Sullivan
|
522cfs |
Big River At Byrnesville
|
241cfs |
East Fork Black River Nr Lesterville
|
19cfs |
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.
Dresser Minerals #7 Dam South (Dry)