Magnetite Tailings Dam

HANOVER CREEK - TR· Grant, New Mexico· Built 1980· Other· 140 ft tall
High Hazard Tailings Private

Key Takeaway

Magnetite Tailings Dam is classified as high hazard in New Mexico. It was completed in 1980 and is 46 years old. Its primary use is tailings. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 140 ft (taller than 93.9% in NM)
Dam Length1,000 ft
Dam TypeOther
Max Storage52 acre-ft
Normal Storage0 acre-ft
Surface Area4 acres
Drainage Area0 sq mi
Year Completed1980 (46 years old)
Year Modified2013
NID IDNM00418

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: July 1, 2020
State Regulated: Yes
Regulatory Agency: OFFICE OF THE STATE ENGINEER

Ownership

FREEPORT MCMORAN CORPORATION

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Magnetite Tailings Dam?

Magnetite Tailings Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Magnetite Tailings Dam?

Magnetite Tailings Dam is owned by FREEPORT MCMORAN CORPORATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Magnetite Tailings Dam built?

Magnetite Tailings Dam was completed in 1980, making it 46 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Magnetite Tailings Dam?

Magnetite Tailings Dam serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Magnetite Tailings Dam?

Magnetite Tailings Dam has a dam height of 140 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Magnetite Tailings Dam last inspected?

Magnetite Tailings Dam was last inspected on July 1, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.