The City of Ajo
Ajo was first located on the ground that later became the open pit mine.
The modern city was founded in its present location in 1917 coincident with the beginning of large scale mining of the copper deposits.
Ajo is the home of the New Cornelia Mine of the Phelps Dodge Corporation which is one of the great copper mines of the world.
The open pit mine is located one mile south of the city and the concentrator, smelter and shops are adjacent to the town site on the east.
1917 – Leaching plant started in operation.
1924 – Concentrator started in operation.
1950 – Smelter started in operation.
Marker is on La Mina Avenue, on the right when traveling north.
Courtesy hmdb.org
