Mining Method

The most viable way to recover the ore body is by a well-established underground mining method called block caving. Block caving is safe, environmentally sound, and cost-effective for mining a large, deep orebody.

In block caving, a large section of ore is initially undercut by drilling and blasting, causing it to collapse under its weight. The blasted ore breaks apart and falls into a series of pre-constructed funnels and access tunnels to form ore extraction drawpoints. From the drawpoints, ore will pass through a series of handling systems to an initial crushing circuit underground before transferring to the above surface Concentrator Complex.

Learn more about the Underground Mining Method here >

Concentrating

In the second step of the production process, we convert the ore from a low-grade material into a concentrate of high-grade copper inside the Concentrator Complex.

The technique all begins with a wet grinding process that turns the crushed ore into a slurry and transports it to flotation cells. When mixed with water, reagents, and air, the copper minerals produce a bubbly froth. The bubbles with copper are skimmed and filtered to produce copper concentrate.

The concentrate, which contains about 29-31% copper, will then be sent to customers for further processing.

Smelting and Refining

When the concentrate leaves our facility, it will complete the smelting and refining phases to separate the copper from other metals. The final result is a 99.999% pure copper cathode, which is an essential raw material for the processing industry. Copper originating from 7,000 ft below the surface will eventually find its way into electrical wiring, electronics, power generation and transmission, automotive applications, and antimicrobial medical products.

Our Work

The Descent: What It’s Like Traveling Nearly 7,000 Ft. Underground

From the surface, 7,000 ft. is hard to picture. It is just a number until you walk toward the shaft, pass beneath the headframe and reach the collar, where the scale starts to come into focus. The opening drops below, surrounded by steel, hoisting equipment and the systems that move people safely between the surface and the underground workings.

Testing What Matters Most: How One Team Helped Make Underground Refuge Chambers Even Safer

When people think about mine safety, they often picture hard hats, reflective clothing and safety inspections. Those are all important, but some of the most important safety work happens long before an emergency occurs, through planning, testing and preparation.

8 Billion Gallons Recycled: Our Commitment to Responsible Water Management

Since 2009, Resolution Copper has treated and provided more than 8 billion gallons of water for agricultural use in Arizona. It is a major milestone for a program that starts nearly 7,000 feet underground and ends in local farm fields.

Resolution Copper awards $110 million in US contracts to advance underground mine

Resolution Copper has awarded approximately $110 million in contracts to Major Drilling America Inc. and Redpath USA Corporation to advance exploration and underground development at the proposed Resolution Copper mine in Arizona.

Every gallon has a job: David’s work in water services

Before anyone can mine copper nearly 7,000 feet underground, someone must move the water. That’s where David comes in. As Water Services Supervisor at Resolution Copper, David helps oversee the systems that treat water pumped from the mine workings while also supporting the site’s potable water system. It’s work that blends science, troubleshooting and teamwork, all with one goal: keeping water moving safely and putting it to good use.

Resolution Copper Establishes $54 Million Tribal Trust

Resolution Copper has provided $54 million to establish the Resolution Copper Tribal Trust, a perpetual endowment that will deliver annual funding to eleven Tribal Nations located in Arizona and New Mexico for cultural preservation, education, youth development, workforce opportunities, language revitalization and other priorities they determine.

Q2 2026 Scorecard: Looking at the Numbers Behind Our Work

Every few months, we publish a scorecard to share where the project stands and what we've been working on. Numbers never tell the whole story, but they help show where we're making progress, where we're investing, and where our attention remains focused. 

Stewardship You Can See at Oak Flat Campground

If you're planning a visit to Oak Flat, here's the most important thing to know: Oak Flat Campground remains open.

Resolution Copper Awards $51,000 in Scholarships to 20 Local Students

Resolution Copper is proud to announce the recipients of its 2026 Scholarship Program, awarding 20 scholarships totaling $51,000 to outstanding students from communities across the Copper Triangle.