Founded by Herbert Hoover in 1909
PARTNER CONTENT
✕
AMERICAS

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...

Start a free trial to continue reading this article

Already have an account?

Subscribe now
RELATED ARTICLES
MORE ON THIS TOPIC

FROM OUR PARTNERS

View more
PARTNER CONTENT

Elevating Human Performance

PARTNER CONTENT

Securing the future of mining: Smarter bolting for safer, stronger operations

MOST POPULAR
1
ASIA

Barrick's dilemma in Pakistan

2
SURFACE

'A quiet revolution': Explosives giant BME at Indaba

3
SURFACE

Inside ABB's electrification of Thacker Pass

4
OPERATIONS

BHP shares spike on higher dividend, major silver deal

MINING IQ

lock Premium subscribers only

View more

Expert-led Insights reports built on robust data, rigorous analysis and expert commentary covering mining Exploration, Future Fleets, Automation and Digitalisation, and ESG.

Expert-led Insights reports built on robust data, rigorous analysis and expert commentary covering mining Exploration, Future Fleets, Automation and Digitalisation, and ESG.

editions

Future Fleets Insights 2026

Exclusive research for the Mining IQ Future Fleets Insights 2026 shows mining companies must invest more in decarbonising if they are to meet CO2 targets

editions

ESG Index 2025: Benchmarking the Future of Sustainable Mining

The ESG Index provides an in-depth evaluation of the ESG performance of 60+ of the world’s largest mining companies. It assesses companies across 10 weighted indicators within 6 essential ESG pillars.

editions

Automation and Digitalisation Insights 2025

Discover how mining companies and investors are adopting, deploying and evaluating new technologies.

editions

Mining IQ Exploration Insights 2025

Gain exclusive insights into the world of exploration in a comprehensive review of the top trending technologies, intercepts, discoveries and more.

Content
about
SOLUTIONS
legal

THE ASPERMONT BRAND PORTFOLIO

Copyright © 2026 Aspermont Media Ltd. All rights reserved, including those for text and data mining, AI training, and similar technologies. Aspermont Media is a company registered in England and Wales. Company No. 08096447. VAT No. 136738101. Aspermont Media, Moor Place, 1 Fore Street Avenue, London, England, EC2Y 9DT.

Login