Mononame 582 Reservoir Report
Nearby: Floyd Lake Dam Old Mines Tailings Dam
Last Updated: December 8, 2025
Mononame 582, located in Old Mines, Missouri, is a privately owned rockfill dam with a primary purpose classified as 'Other'.
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Summary
Constructed in 1948, this dam stands at a height of 20 feet and has a storage capacity of 171 acre-feet, serving a drainage area of 60 square miles. Despite its low hazard potential and 'Not Rated' condition assessment, Mononame 582 has not been subject to state regulation, permitting, inspection, or enforcement.
The dam, situated on TR Old Mines Creek in Washington County, Missouri, is managed by the Kansas City District of the US Army Corps of Engineers. With a surface area of 16 acres and a normal storage capacity of 20 acre-feet, Mononame 582 plays a vital role in water resource management in the region. Although lacking detailed information on spillways, outlet gates, and locks, this dam remains a key infrastructure for maintaining water levels and controlling discharges in the area.
Water resource and climate enthusiasts will find Mononame 582 to be an intriguing structure that highlights the importance of privately owned dams in supporting various purposes beyond flood control and hydroelectric power generation. Its historical significance, modest size, and unique design features make it a noteworthy site for further study and appreciation in the realm of water management and conservation efforts.
Year Completed |
1948 |
Dam Height |
20 |
River Or Stream |
TR OLD MINES CREEK |
Primary Dam Type |
Rockfill |
Surface Area |
16 |
Drainage Area |
60 |
Nid Storage |
171 |
Structural Height |
20 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big River Near Richwoods
|
199cfs |
Big River At Irondale
|
24cfs |
Big River Below Desloge
|
54cfs |
Meramec River Near Sullivan
|
461cfs |
Big River At Byrnesville
|
213cfs |
East Fork Black River Nr Lesterville
|
17cfs |
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.
Mononame 582