Laguna del Desierto incident Laguna del Desierto region, the tribunal set the "hito 62" (cornerstone 62) at the O'Higgins/San Martin Lake and draw the boundary from there to mount Fitz Roy on the Martínez de Rozas Range awarding Chile the complete valley of Laguna del Desierto. In 1946 an aerial reconnaissance of the United States Air Force, ordered by the Chilean government, revealed that the lake emptied to the Atlantic shores. Chile and Argentina have to redraw its maps. The initially organized labour support for 1963 elected Argentine President Arturo Illia turned to antagonism during 1964, as secret plans for Juan Domingo Perón's return
Laguna del Negro Francisco divert waters of the Astaburuaga River for irrigation purposes; later devised projects envisaged capturing the discharge into the lake in a canal and transfer the water through a tunnel into the Figueroa River, one of the headwaters of the Copiapó River;) or to divert the Astaburuaga River into the Salar de Maricunga and from there into the Copiapó River catchment. In 2009, a mining company held rights to divert about from the Astaburuaga River. The lakes of the water itself are not suited for either drinking or irrigation purposes. Laguna del Negro Francisco Laguna del Negro Francisco is a lake