In 2021, Corantioquia found that the company had violated regulation by installing and operating an exploratory mining platform within the mandatory minimum distance allowed from the tributary.

The company reportedly drilled 650m beneath the platform, which may have had a deleterious effect on the underground aquifers, although the authority emphasised that the penalty was solely for the distance violation.

[11][12][13][14][15][16][17][18][19][20][excessive citations] At the end of 2019, several environmental leaders were invited to an event organized between the Heinrich Böll Foundation and Renzo García in the city of Bogotá where the present the book "Huellas de la energía"[21] and structured a conversation to avoid fracking for the Design of Strategies for the Defense of the Páramo de Santurbán, where Hermán Vergara, a resident of Támesis Antioquia and social leader, denounced some presumed dangers that it entailed his region that included the municipality of Támesis, AngloGold's mining commitment in Southeast Antioquia, among them the installation of a tailings dam 2 km from the Cauca River with characteristics similar to that of Brumadinho in Brazil whose collapse caused severe environmental damage, also leaving 270 people dead.

After learning of this complaint, Luis Carlos Rúa,[22] a guest at the event, developed a public collection through social networks to finance an investigation in the area of influence in the project.

On the other hand, some national figures who at the time supported the arrival of multinationals, today oppose the project, without the reason for their opposition is clear, as in the case of former President Uribe, who is said to have personal interests in the area.