Confident in its strong position, the trade union declared a total strike on February 9, 2017. During the first week of the labour conflict, concerned by the lack of dialogue between the parties, the labour ministry tried to intervene as an arbiter but without success. Tension escalated as road blocks, allegedly organised by the trade union, restricted access to the mine. Furthermore, when in mid-March BHP Billiton sent an official letter with a new proposal, the union symbolically responded by burning the letter. On March 17, the company made its final offer, which included a CLP 11.5mn or USD 16,900 contract bonus per worker, and wage adjustments based on the inflation between 2013 and 2016. The union once again rejected it, as the proposal still envisaged different terms for new and old employees. The impasse finally ended on March 23, when the union formally requested the automatic renewal of the collective bargaining agreement for a period of 18 months as of February 2017.
This ended the longest mining strike in the history of Chile. It lasted 44 days and was one of the key factors for the 1.3% y/y contraction of the country’s GDP in February 2017, the largest drop since October 2009.