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

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.

Resolution Copper in the Community | June 2026 Recap

Throughout June, Resolution Copper employees partnered with local organizations, educators, tribal communities, nonprofit groups, elected officials, and regional leaders to support education, strengthen relationships, invest in youth, and help build a brighter future for the Copper Corridor and beyond.

Resolution Copper Named Large Business of the Year by Mesa and Globe-Miami Chambers of Commerce

Resolution Copper is proud to announce that we have been named 2026 Large Business of the Year by both the Mesa Chamber of Commerce and the Globe-Miami Regional Chamber of Commerce.

Resolution Copper and United Association Local 469 Enter into Master Supply Agreement Supporting Operations in Arizona

Resolution Copper has entered into a Master Supply Agreement with Johnson Controls Inc. and the United Association Local 469 (U.A. Local 469), establishing a framework for ongoing facility maintenance and operational support services at the project site.