Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 346

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 346
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 experience drier conditions whereas others could experience greater rainfall. A further consideration

relates to the alternative commercial use for the processed water, which could support ultimate transfer of these costs to a third party.

(c) Indirect costs, owners' costs and contingency include adjustments to the underlying cash flows to align the closure provision with a central-case estimate. This excludes allowances for

quantitative estimation uncertainties, which are allocated to the underlying cost driver and presented within the respective cost categories above.

| Geographic composition as at 31 December | 2024US$m | 2023US$m |
| Australia                                |    8,546 |    9,187 |
| US                                       |    4,419 |    4,682 |
| Canada                                   |    1,517 |    1,722 |
| Other countries                          |    1,249 |    1,559 |
| Total                                    |   15,731 |   17,150 |

The geographic composition of the closure provision shows that our closure obligations are largely in countries with established levels of

regulation in respect of mine and site closure.

| Annual Report on Form 20-F 2024 | 192 | riotinto.com |

Financial statements | Notes to the consolidated financial statements

14 Close-down, restoration and environmental provisions continued

Projected cash flows (undiscounted) for close-down, restoration and environmental provisions

|                    | <1 yearUS$m | 1-3 yearsUS$m | 3-5 yearsUS$m | >5 yearsUS$m | TotalUS$m |
| At31 December 2024 |       1,183 |         2,497 |         1,880 |       17,478 |    23,038 |
| At31 December 2023 |       1,523 |         2,365 |         2,005 |       17,479 |    23,372 |

Remaining lives of operations and infrastructure range from 1 to over 50years with an average for all sites, weighted by present closure

obligation, of around 14years . Although the ultimate cost to be incurred is uncertain, the Group’s businesses estimate their respective costs

based on current restoration standards, techniques and expected climate conditions.

| Key accounting estimate - close-down, restoration and environmental obligationsThe most significant assumptions and estimates used in calculating the provision are:–Closure timeframes. The weighted average remaining lives of operations is shown above. Some expenditure may be incurred before