This 1958 cover image shows iron workers at the head of the Glen Canyon bridge in Arizona. It was built to transport materials for the construction of the Glen Canyon dam, given the remote location of the dam in a deep stoneware cannon on the Colorado river.
The bridge was designed by the United States Claim Office and built by a joint company, Kiewit -judson Pacific Murphy.
The depth of 700 feet of the cannon meant that the false work was impossible, so that the cables were used to serve the work and the partially completed arcs were supported by link cables.
A cable, with a capacity of 12 tons, workers injured and small supplies, while the main cable, with a capacity of 25 tons, brought the members of the bridge.
The use of backward cables to turn interest in their final position and the cables’ tension method was new for the bridge building.
At the end, the main bridge of the 1,028 -foot bridge turned it into the second longest steel arched bridge in the United States, and its height from the barrel floor made it the highest arch bridge in the world.
