Digging Without Diesel
How Critical Mineral Mines Are Electrifying from the Pit to the Refinement.
420 miles northeast of Perth in Australia is a landscape beautiful in its shades of red and brown, yet brutal and the very definition of podunk nowhere. The kind of place where the nearest town is roughly an hour’s drive away on remote outback roads, and the air tastes of dust and iron.
Epiroc Minetruck MT65 S haulers emerge from an underground mine entrance carrying spodumene ore to a stockpile, diesel exhaust rising with them from below. On the surface, loaders and ancillary equipment keep the operation moving, adding their own smoke to the air. And beside all of it, catching the Western Australian sun, solar panels stretch across the plateau and wind turbines turn slowly against the sky. One side of that picture is what mining has always looked like. The other is what it is becoming. How the industry closes the gap between the two is where the story gets interesting.
This is Liontown Resources’ Kathleen Valley Lithium Operation, Australia’s first underground lithium mine, and it runs on what Zenith Energy describes as Australia’s largest operating off-grid hybrid power system. Built, owned, and operated by Zenith under a 15-year power purchase agreement, the system combines 17MW of solar, 30MW of wind, and 17MW/20MWh of battery storage, with gas and diesel kept in reserve for when they are needed. The combination has delivered a minimum of 60% renewable energy from day one, with the system dropping into engine-off mode whenever the sun and wind are doing the heavy lifting.
When it comes to the mine’s location, Kathleen Valley is not the exception, it is the rule. The world’s critical mineral deposits do not sit conveniently beside power grids, fuel terminals, or population centers. They sit in deserts, mountain ranges, and remote boreal forests, places where every input has to be planned, transported, and paid for at a premium. For generations that meant fossil fuels. Diesel for the trucks. Diesel for the drills. Diesel and natural gas for the generators keeping the lights on and the processing plant running 24/7. It worked, but it was never efficient and it was never cheap.
