
Our program
Only available in portuguese.
Commitment to safety and the environment
Photo: Pedro Gravatá
Upstream Dam De-characterization Program




Schedule for Structures Undergoing De-characterization and yet to be De-characterized

Downstream Containment Structures (DSR)
Photo: Fernando Piancastelli
Between 2020 and 2022
We completed the construction of four DSRs in Minas Gerais: one for the Sul Superior Dam, in Gongo Soco; one for the Forquilha I, Forquilha II, Forquilha III and Grupo Dams, located between Ouro Preto and Itabirito; one for the B3/B4 Dam, in Nova Lima; and one for the Minervino and Cordão Nova dikes, part of the Pontal System, in Itabira.
In 2024
With the completion of the de-characterization of the B3/B4 dam in Nova Lima, the DSR that had been built was removed and the area was reintegrated into the environment.
In 2025
Photo: Videodelivery
B3/B4 – A Milestone in Dam De-characterization
The de-characterization of the B3/B4 dam, located at Mina de Mar Azul in Macacos (Nova Lima - MG), represented a historic milestone for Vale and for the safe management of dams in Brazil. In May 2024, the process of de-characterization of the structure was completed - the first dam built using the upstream method, which had been at the maximum emergency level (level 3) to be completely eliminated. The work was carried out using 100% autonomous equipment, operated remotely, guaranteeing zero risk to the operators throughout the entire project.
Link to documents (Technical reports)
In compliance with the De-characterization State of Commitment signed with the main regulatory bodies and the Public Prosecutor's Office, Vale makes available monitoring reports on the execution of de-characterization works for its upstream dams. Access the construction progress reports. Access the construction progress reports:
2024 Edition
May
