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Beginning construction work on Six Companies Inc. railroad and highway, which will lead to the upper portals of the Nevada Diversion Tunnels. Looking upstream, from th...Show more
Beginning construction work on Six Companies Inc. railroad and highway, which will lead to the upper portals of the Nevada Diversion Tunnels. Looking upstream, from the Nevada side, approximately one mile above Cape Horn. 05/23/1931
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Laying a six-inch air line across the first suspension bridge. Arizona cliffs in background. This view is taken approximately one quarter mile upstream from the site o...Show more
Laying a six-inch air line across the first suspension bridge. Arizona cliffs in background. This view is taken approximately one quarter mile upstream from the site of the upper portals of the diversion tunnels. 05/22/1931
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Upstream steel suspension bridge, under construction. This bridge is supported by eight 2-inch cables, and will be used first for transporting excavated muck from the ...Show more
Upstream steel suspension bridge, under construction. This bridge is supported by eight 2-inch cables, and will be used first for transporting excavated muck from the diversion tunnels. 01/01/1932
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Union Pacific "Train of Tomorrow" on the Lomax trestle, at the upstream face of Boulder Dam, where the concrete is transfered from the Lomix trains to the dam. 03/09/1...Show more
Union Pacific "Train of Tomorrow" on the Lomax trestle, at the upstream face of Boulder Dam, where the concrete is transfered from the Lomix trains to the dam. 03/09/1934
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