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Sunk cost: Resolution completes $200M shaft extension

At 2.1km, Resolution Copper’s No. 9 shaft is now the second deepest lift mine shaft in the US

James Stent
Shaft No. 9's final depth is 2103m, second only in the US to Resolution’s No. 10 shaft at 2116m

Shaft No. 9's final depth is 2103m, second only in the US to Resolution’s No. 10 shaft at 2116m | Credits: Resolution Copper

Resolution Copper has completed its US$200 million extension of the No. 9 Shaft, the BHP and Rio Tinto-owned US copper development announced this week. No. 9 was originally sunk as a production shaft...

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