The $825 million acquisition of Rincon gives Rio Tinto a large undeveloped lithium brine project located in the heart of South America's lithium triangle.
The proposal is to build a plant on the coast of the Valparaiso region that would produce drinking water for residents in exchange for access to waste water that could be used at mines.
In Colombia, 74% of residents of municipalities where mining operations exist and 64% of non-mining municipalities believe that mining is beneficial for the country.