Giving you all the latest in Stock Market Information as it happens...

25805,25766,25763,25760,25756,25753,25751,25747,25745,25743,

Rio to Invest US790m

Rio Tinto to invest additional US$790 million in expansion of Pilbara capacity to 330 Mtpa 4 August 2010 Rio Tinto is to invest a further US$790 million in its drive to expand the annual capacity of iron ore operations in the Pilbara to 330 million tonnes. This brings total investment funds approved in recent weeks to US$1 billion. The Pilbara 330 expansion centres on increasing the Rio Tinto’s port at Cape Lambert from its current annual capacity of 80 million tonnes to 180 million tonnes by 2016. This will be achieved through construction of a new 1.8 kilometre jetty and four-berth wharf to run parallel to the existing jetty and four-berth wharf. On 14 July, Rio Tinto announced that it would spend US$200 million on dredging works for the Cape Lambert expansion. The investment announced today comprises US$375 million (Rio Tinto share 100% basis) for marine works related to the construction of the new wharf, and US$415 million (100% basis) for the procurement of long lead items such as pile and marine structure and on-shore earthworks and machines. Rio Tinto chief executive Iron Ore and Australia Sam Walsh said the new investment highlighted Rio Tinto’s intention to forge ahead with the expansion. "Rio Tinto has a proven track record of managing large-scale iron ore development projects, and has successfully implemented three significant increases in port capacity in the past seven years - Dampier to 140 million tonnes [in two stages] and Cape Lambert to 80 million tonnes,” he said. “As with previous expansions, a key factor in this project will be minimising any disruption to existing operations and production schedules. We are confident this will be achieved.” The early construction works are dependent upon a number of government and other approvals, including that of the Robe River joint venture partners. A final investment decision is expected to be made by the end of this year. Rio Tinto's planned growth of its Pilbara iron ore operations to 330 Mt/a capacity consists of the following steps: • 225 Mt/a by Q1 2011 - Dampier port systems efficiencies (in implementation) • 230 Mt/a by Q2 2012 - Dampier port incremental gains (in feasibility study) • 280 Mt/a by H1 2014 – Cape Lambert B 1st 50 Mt/a increment (now in feasibility study) • 330 Mt/a by H1 2016 – Cape Lambert B 2nd 50 Mt/a increment (pre-feasibility completed) Rio Tinto is a leading international mining group headquartered in the UK, combining Rio Tinto plc, a London and NYSE listed company, and Rio Tinto Limited, which is listed on the Australian Securities Exchange. Rio Tinto's business is finding, mining, and processing mineral resources. Major products are aluminium, copper, diamonds, energy (coal and uranium), gold, industrial minerals (borax, titanium dioxide, salt, talc) and iron ore. Activities span the world but are strongly represented in Australia and North America with significant businesses in South America, Asia, Europe and southern Africa. For further information, please contact: Media Relations, EMEA / Americas Tony Shaffer Office: +44 (0) 20 7781 1138 Mobile: +44 (0) 7920 041 003 Christina Mills Office: +44 (0) 20 7781 1154 Mobile: +44 (0) 7825 275 605 Media Relations, Australia / Asia David Luff Office: +61 (0) 3 9283 3620 Mobile: +61 (0) 0419 850 205 Gervase Greene Office: +61 (0) 8 9327 2975 Mobile: +61 (0) 408 098 572 Media Relations, Canada Bryan Tucker Office: +1 (0) 514 848 8151 Mobile: +1 (0) 514 825 8319 Investor Relations, London Mark Shannon Office: +44 (0) 20 7781 1178 Mobile: +44 (0) 7917 576597 David Ovington Office: +44 (0) 20 7781 2051 Mobile: +44 (0) 7920 010 978 Investor Relations, North America Jason Combes Office: +1 (0) 801 204 2919 Mobile: +1 (0) 801 558 2645 Investor Relations, Australia Dave Skinner Office: +61 (0) 3 9283 3628 Mobile: +61 (0) 408 335 309 Simon Ellinor Office: +61 (0) 7 3361 4365 Mobile: +61 (0) 439 102 811 Website: www.riotinto.com Email: media.enquiries@riotinto.com / enquiries.mediaaustralia@riotinto.com High resolution photographs and media pack available at: http://www.riotinto.com/media