Magmont Tailings Dam Reservoir Report
Nearby: Clearwater Lake Dam Mononame 41
Last Updated: January 11, 2026
The Magmont Tailings Dam, located in Bixby, Missouri, was completed in 1979 and is primarily used for tailings disposal from the Magmont Mine.
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Summary
Owned by a private entity, the dam is regulated by the Dam and Reservoir Safety Program in Missouri. Standing at a height of 135 feet and with a length of 1190 feet, the dam has a storage capacity of 4600 acre-feet and serves a drainage area of 655 square miles, with a maximum discharge capacity of 6572 cubic feet per second.
Despite being rated as having a high hazard potential, the Magmont Tailings Dam is currently in satisfactory condition, as assessed in December 2007. The dam has a spillway width of 65 feet and is constructed using stone core types on a rock foundation. The dam's risk assessment is moderate (3), indicating that there are potential risks associated with its operation. With regular inspections and a satisfactory condition assessment, the dam is equipped to handle emergencies and ensure the safety of the surrounding area in the event of a breach.
Water resource and climate enthusiasts will find the Magmont Tailings Dam to be an intriguing structure with a significant impact on the local environment and water systems. As a crucial part of the Magmont Mine operations, the dam's design, operation, and maintenance play a vital role in ensuring the safety and sustainability of the surrounding area. With its high hazard potential and moderate risk assessment, the dam serves as a reminder of the importance of proper monitoring and maintenance of critical infrastructure in the face of changing climate conditions and water resource management challenges.
Year Completed |
1979 |
Dam Length |
1190 |
Dam Height |
135 |
River Or Stream |
TR-LEFT FORK NEALS CREEK |
Primary Dam Type |
Other |
Surface Area |
106 |
Drainage Area |
655 |
Nid Storage |
4600 |
Structural Height |
134 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
135 |
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.
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