Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 520

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 520
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 one year after the start of production at the Escondida Norte pit. The third concentrator plant was commissioned in 2016. Current ownership since 2010 is BHP (57.5%), Rio Tinto (30%), JECO Corporation (10%) and JECO 2 Limited (2.5%). MEL operates Escondida. For further details regarding the history for the Escondida property, see Mines and Production Facilities-Escondida on page 306 . Infrastructure All required infrastructure supporting the current mine plan including roads, rail and port, power and water supply is in place. Access to Escondida is via a company maintained public road from the city of Antofagasta in northern Chile, which is serviced by the regional airport. The site infrastructure, centred on the two pits, includes three concentrator plants, one heap and one dump leaching process facilities, associated cathode production plant, tailings deposit, along with support and service facilities. Two MEL owned and operated seawater desalination plants are located at Punta Coloso on the Antofagasta coastline and supply water for processing plants, mine operations and supporting infrastructure via three pipelines to the mine site. Water is recycled from the tailings dam for re-use in the concentrator plants. The nearby Coloso port facility receives copper concentrate via a pipeline from the mine site and processes this to a dry concentrate ready for stockpiling and loading via a dedicated concentrate shiploading facility. Both concentrate pipeline and port facilities are owned and operated by MEL. Additional third-party owned port infrastructure is located at Antofagasta, including rail, train unloading and ship loading facilities.

| Annual Report on Form 20-F 2024 | 347 | riotinto.com |

Additional information | US Disclosure

Escondida utilises an existing privately owned railway system to transport copper cathode product from site and consumables to site through the ports of Antofagasta and Mejillones. Escondida owns a minor rail spur connecting the mine site into the publicly owned railway. Since 2022, Escondida has had contracts in place with ENEL and Colbun for energy purchase, both providing power from 100% renewable sources. Power from Tamakaya is used as back up when required. The power is supplied at 220kV and then distributed throughout the operations to the required locations via a series of substations. The power transmission system that supplies the mine site is owned and managed by MEL. The workforce