On May 13, 2024, Vale S.A. completed the de-characterization of the B3/B4 dam, removing 3.3 million cubic meters of tailings, and marked the 14th upstream dam de-characterization since 2019, with a total investment of $1.7 billion for safety improvements. The project involves further land restoration and is 46% complete towards eliminating all upstream dams by 2026.