06:08 AM EDT, 10/07/2025 (MT Newswires) -- Rio Tinto (RIO), Mitsui and Nippon Steel said late Monday they plan to invest $733 million to develop the West Angelas sustaining project in Western Australia's Pilbara region.

The project, which is part of the Robe River joint venture, has secured all state and federal government approvals. Rio Tinto's investment share will be $389 million.

Ore mined at the new deposits will be trucked to the West Angelas hub, with first ore scheduled for 2027, the companies said.