Work to buttress Kennecott will cut Rio Tinto's 2015 copper output

Global miner Rio Tinto expects oversupply to pressure copper prices in the medium term and said its copper output will shrink in 2015, mainly due to work at its Kennecott Utah unit to avoid another landslide. The Kennecott operation in the US was hit by a severe landslide in April last year which shifted 150-million tonnes of material and buried a section of the openpit mine.