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De-characterization plan

One of the main milestones to reduce the company's risk level is the de-characterization of all its upstream structures. Vale has already started this process, which will continue in the coming years. The first de-characterization, of the 8B dam, was completed in December 2019. The de-characterized structures will be reintegrated into the environment, seeking to guarantee environmental performance compatible with the territory in which they are located.

To allow de-characterization works under safer conditions and to increase safety in areas downstream of dams, in specific cases, Vale is building containment structures, or back-up dams. The construction of the first back-up dam for the Sul Superior dam, in the municipality of Barão de Cocais, was completed in early 2020. The completion of the back-up dam of the B3/B4 dam was completed in 2H20, while the back-up dam of the Forquilhas and Grupo dams is expected by 1H21.

Some of Vale's dams have smaller internal dikes, which were also built using the upstream method and, therefore, will also be de-characterized. Finally, under the terms of the National Mining Agency’s Resolution nº 13/19, dated August 2019, which extended the legal obligations applicable to upstream dams for drained stacking structures, two² of these structures were also included in the de-characterization plan.

The de-characterization plan for upstream structures was updated in September 2020, based on information and studies on the company's structures, which are continuously updated. The plan considers 29 geotechnical structures, comprising: 14 dams, of which 1 (8B) was already de-characterized; 13 dikes, of which 2 (2 Kalunga and 3 Kalunga) was already de-characterized; and 2 drained stacks.

Vale has provisioned U$$ 2.0 billion for the de-characterization of upstream dams and other structures in 1Q19 and 2Q19, and has provisioned additional US$ 671 million in 4Q19. Originally, three structures were framed. With the reclassification of the Xingu drained stack as a dam in September 2020, based on updated studies and information, this number has been reduced to two.

1 Xingu was reclassified in September 2020, based on updated studies and information. Originally, its classification was drained stack.
2 Originally, three structures were framed. With the reclassification of the Xingu drained stack as a dam in September 2020, based on updated studies and information, this number has been reduced to two.
3 DP is the acronym for Drained Pile.
4 It should be noted that dikes 2, 3, 4 and 5, Minervino and Cordão Nova Vista (all part of the Pontal System), Auxiliary B5, Ipoema, Rio do Peixe, 1A and 1B are not included in the requirements of Norm DNPM/ANM 70.389/2017, due its characteristics.

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