La Negra (industrial complex)
La Negra is a small industrial complex east of Antofagasta, Chile after crossing the coastal mountain range, in the Atacama Desert. Overview. Among "La Negra" industries, the two major ones are "Altonorte", a copper smelter refinery, and "Inacesa", a cement plant. It offers basic services for truckers and travelers in general. La Negra is also the intersection of the Pan-American Highway and the road from Antofagasta to Escondida Mine. It counts a station on the Salta–Antofagasta railway.