Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The original caption on this 1939 photo says: "Ed Ruben, left, and Ben Conklin, riveters, hoist platforms
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1934 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
Train bridges at the Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
A handwritten note on the back of this1939 photo says: "Blasting at Bingham."
Tribune file photo
The original caption on this 1941 photo says: "Typical Bingham scene is long ore train crossing one of ma
Tribune file photo
The original caption on this 1934 photo says: "The airline annihilates distance. As the mail flies it is
Tribune file photo
The original caption on this 1941 photo says: "Utah Copper Company completes link in construction program
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1941 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The original caption on this 1940 photo says: "Circle shows location of blast which killed three men. Exp
Tribune file photo
Employees of the Utah Copper Company, now known as Kennecott, are seen in this undated photo. Left to right th
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The original caption on this 1939 photo says: "Ed Ruben, left, and Ben Conklin, riveters, hoist platforms up to steel star in preparation for work."
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1934 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
Train bridges at the Utah Copper Company, now known as Kennecott, is seen in this 1937 photo.
Tribune file photo
A handwritten note on the back of this1939 photo says: "Blasting at Bingham."
Tribune file photo
The original caption on this 1941 photo says: "Typical Bingham scene is long ore train crossing one of many gulches on high steel trestles. Shown here is Markham gulch bridge."
Tribune file photo
The original caption on this 1934 photo says: "The airline annihilates distance. As the mail flies it is but a few hours from Salt Lake to san Francisco. Picture shows liner over Bingham copper mines ona regular trip across the continent."
Tribune file photo
The original caption on this 1941 photo says: "Utah Copper Company completes link in construction program. This 228-foot underpass is at mouth of Bingham canyon. An earth fill will be made over the structure and a railroad line built on it."
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this 1941 photo.
Tribune file photo
The Utah Copper Company, now known as Kennecott, is seen in this undated photo.
Tribune file photo
The original caption on this 1940 photo says: "Circle shows location of blast which killed three men. Explosion buried three Utah Copper company employees under tons of rocks."
Tribune file photo
Employees of the Utah Copper Company, now known as Kennecott, are seen in this undated photo. Left to right the men are James E. Mabey, B.D. Willes, J.E. Utley and D.R. Firman.