The initial capital requirement at Escalones is $438.4 million, followed by a sustaining investment of $192.5 million over the 20-year life of the project.
The world's no.1 miner had a busy six months marked by sweeping changes, including selling its $13 billion petroleum business and a listing unification, while managing pandemic-related disruptions to its business.
Las Bambas, which produces 2% of the world's copper supply, has said it will have to suspend production on February 20 if the road is not cleared by then.