Magmont Tailings Dam
Magmont Tailings Dam is an other dam located in Iron County, Missouri, built in 1979. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Magmont Tailings Dam
The primary purpose of Magmont Tailings Dam is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Teck American Inc (private). It impounds the Tr-left Fork Neals Creek near Bixby.
The dam stands 135 feet tall and stretches 1,190 feet across, creates a reservoir covering 106 acres, has a maximum storage capacity of 4,600 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1979, the structure is 47 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 02/16/2023.
At 135 feet, this dam is taller than 99% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Missouri dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Iron |
| Nearest City | Bixby |
| River/Stream | Tr-left Fork Neals Creek |
| Coordinates | 37.63151, -91.10856 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 135 ft |
| Dam Height | 135 ft |
| Dam Length | 1,190 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 4,600 acre-ft |
| Max Storage | 4,600 acre-ft |
| Normal Storage | 3,500 acre-ft |
| Surface Area | 106 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 6,572 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner | TECK AMERICAN INC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/16/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO30917 |
| Federal ID | MO30917 |
| More Info | State Dam Safety Program |