Mariana Minerals’ Utah Copper Mine Restart Signals a New Era of Autonomous Mining and Refining

Autonomous mining is moving from pilot programs to full-scale operational strategy, and Mariana Minerals is making a bold claim at the center of that shift.

Key Developments at Copper One

The company has restarted mining operations at Copper One in southeastern Utah, positioning the site as the world’s first mine to deploy autonomous tools across mining, refining, and capital project execution under a single operating system. For the mining sector, it represents a major test case for whether end-to-end autonomy can improve production speed, operational resilience, and domestic copper supply.

The restart includes several major milestones:

• Copper One becomes the world’s first autonomous-first mine and refinery
• Autonomous systems are active across mining, refining, and project execution from day one
• The site integrates haulage, drilling, and robotic inspection under one AI platform called MarianaOS
• Mariana acquired Lisbon Valley Mining Company in Q4 2025
• The operation includes a roughly 10,000-acre permitted land package
• The mine has produced high-purity copper cathode since 2009
• Mariana plans to scale output to 50,000 metric tons per year by 2030

While refining operations continued uninterrupted, mining activity had been paused in late 2024. Mining operations resumed this month with autonomy-first deployment built into the restart strategy.

MarianaOS: A Unified Operating System for Mining

What makes Copper One different is not just the use of autonomous equipment, but the software layer coordinating the entire operation.

Mariana’s internal platform, MarianaOS, connects three operational systems:

• MineOS for mining operations
• PlantOS for refining operations
• CapitalProjectOS for capital project execution

These systems create a unified platform that manages everything from haul truck operations and drilling to refinery optimization and infrastructure expansion.

Turner Caldwell, co-founder and CEO of Mariana Minerals, said autonomy itself is the core objective.

“Copper One will be the first mine where delivering end-to-end autonomy is the priority, where it’s being rapidly deployed across mining and refining operations and coordinated by our internal software stack. That’s what MarianaOS makes possible.”

“We chose to prove it here because the stakes are real: the U.S. has a structural copper deficit, and the window to close it is narrowing. We’re producing now and ramping output aggressively, with the primary goal of achieving fully-autonomous mining operations.”

Autonomous Equipment Across the Entire Site

On the mining side, Copper One begins with three autonomous equipment platforms working together.

Pronto provides the Autonomous Haulage System (AHS), using camera-based machine learning and Global Navigation Satellite Systems (GNSS) to enable fully driverless haul truck operations across mixed fleets.

Sandvik’s AutoMine platform supports autonomous production drilling, allowing operators to monitor multiple surface machine operations remotely from a control center.

Boston Dynamics contributes Spot quadruped robots, which patrol the open pit, heap leach pad, and solvent extraction-electrowinning (SX-EW) refinery infrastructure.

All operational data feeds directly into MineOS for fleet-wide optimization and continuous improvement.

Extending Autonomy Into Refining

The automation strategy does not stop at extraction as PlantOS integrates real-time refinery sensor data—including solution chemistry, flow rates, temperature, and electrowinning cell performance—into a centralized control system.

Machine learning models are used to predict process drift, automatically adjust reagent dosing, and identify maintenance needs before they affect production output.

The goal is a continuously optimized refinery operating with minimal human intervention, improving both efficiency and consistency.

Rethinking Capital Project Delivery

CapitalProjectOS is designed to address one of mining’s most persistent challenges: long, expensive infrastructure development timelines.

The system integrates engineering, procurement, construction, commissioning, and process development into a single platform for real-time progress tracking, predictive risk modeling, and schedule optimization.

At Copper One, it is managing the roadmap to scale production to 50,000 metric tons annually, coordinating heap leach pad expansion, refinery upgrades, and autonomous equipment deployment simultaneously.