CSN Charged Over Iron-Ore Leak at Minas Gerais Mine
Brazilian authorities charged CSN after a pipeline leak at its Casa de Pedra mine sent iron-ore sediment into a creek and a Vale site in Congonhas on 6. The post CSN Charged Over Iron-Ore Leak at Minas Gerais Mine appeared first on The Rio Times .
On 6 August 2026, a pipeline at CSN's Casa de Pedra iron-ore mine in Congonhas, Minas Gerais, leaked iron-ore sediment onto a nearby Vale facility and the Córrego Maria José creek. The Minas Gerais environmental secretariat, Semad, announced that CSN would face fines for the environmental damage. Water monitor Igam ordered emergency water sampling in the affected area.
CSN maintained that the incident was limited and that the pipeline carried material only within its industrial area, with no injuries reported. Brazilian authorities initiated legal proceedings against CSN Mineração, the iron-ore arm of Companhia Siderúrgica Nacional, after detecting the leak around 6:50 a.m. local time, following a planned plant shutdown.
The leak was not related to tailings, and no evacuation was necessary. The incident has raised concerns about mining safety in Minas Gerais, a state that has experienced two major tailings dam failures since 2015 at Mariana and Brumadinho.
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