The inhabitants of the Huasco valley, a semi-arid region, depend on water resources from the upper catchments in high-altitude Andes glaciers which contribution to the discharge of two Huasco River headwaters: the Estrecho River and the Potrerillos River which arise from two small neighboring catchments, they actually belong to two major subcatchments of the Huasco Basin.

[2] A collaborative study between the Centro de Estudios Avanzados en Zonas Áridas (CEAZA) and the Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE) investigated the glacier contribution to the Huasco River basins by two glaciated headwater catchments which included the monitoring of five Andean glaciers (Toro 1, Toro 2, Esperanza, Guanaco, Estrecho and Ortigas) between 2003/2004 and 2007/2008 hydrological years.

The Andean "glaciers accelerated retreat" represents a "striking example of climate change impacts.

[3] In May 2013, Chile's Superintendence of the Environment Superintendencia del Medio Ambiente (SMA) notified Barrick Gold that the company had to cease construction activities at Pascua-Lama until they complete water management system in accordance with the project's environmental permit.

Barrick Gold was also fined approximately $16 million for noncompliance regarding the project's water management system.