Image: The Holden copper mine operated in Washington State, US until http://www.riotinto.com/our-commitment-107.aspx http://www.riotinto.com/ourcommitment/spotlight-18130_18955.aspx 2017 Sustainable development report riotinto.com/sd2017 Governance integrity: 47 Working within a remote community Holden presented particular challenges to the clean-up project.