Copper Flats Tailings Dam

GRAYBACK ARROYO· Sierra, New Mexico· Built 1980· Earth· 54 ft tall
Significant Hazard Tailings Private

Key Takeaway

Copper Flats Tailings Dam is classified as significant hazard in New Mexico. It was completed in 1980 and is 46 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 54 ft (taller than 74.2% in NM)
Dam Length6,628 ft
Dam TypeEarth
Max Storage4.0K acre-ft
Normal Storage0 acre-ft
Surface Area150 acres
Drainage Area1 sq mi
Year Completed1980 (46 years old)
NID IDNM00564

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

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

Emergency Action Plan: No
Last Inspection: April 26, 2018
State Regulated: Yes
Regulatory Agency: OFFICE OF THE STATE ENGINEER

Ownership

NEW MEXICO COPPER CORPORATION

Private

Frequently Asked Questions

What is the hazard classification of Copper Flats Tailings Dam?

Copper Flats Tailings Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Copper Flats Tailings Dam?

Copper Flats Tailings Dam is owned by NEW MEXICO COPPER CORPORATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Copper Flats Tailings Dam built?

Copper Flats 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 Copper Flats Tailings Dam?

Copper Flats 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 Copper Flats Tailings Dam?

Copper Flats Tailings Dam has a dam height of 54 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 Copper Flats Tailings Dam last inspected?

Copper Flats Tailings Dam was last inspected on April 26, 2018. 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.