Transportation

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  • Beginning construction on Six Companies railroad and highway, which will lead to the upper portals of the Nevada diversion tunnels. 05/23/1931

    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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    31-al19-12
  • Six Companies Inc. employees aligning and oiling six miles of road down Hemenway Wash, toward the Upper Portals. 11/19/1931

    Six Companies Inc. employees aligning and oiling six miles of road down Hemenway Wash, toward the Upper Portals. 11/19/1931

    31-al19-138
  • Workers laying a 6 inch air line across the first suspension bridge. 05/22/1931

    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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    31-al19-18
  • Upstream steel suspension bridge under construction, will first be used for transporting excavated muck from the diversion tunnels. 01/01/1932

    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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    31-al19-162
  • Pile and trestle road crossing the Colorado River. 02/10/1932

    Pile and trestle road crossing the Colorado River one-half mile below the Arizona gravel pits. 02/10/1932

    31-al19-212
  • Dumping materials at temporary pile bridge to complete diversion of the Colorado River. 11/13/1932

    Dumping materials at temporary pile bridge to complete the diversion of the Colorado River. 11/13/1932

    31-al20-104
  • Excavation operations on Cableway Bench No. 7 and No. 8, Nevada side. 08/07/1932

    Excavation operations on Cableway Bench No. 7 and No. 8, Nevada side. 08/07/1932

    31-al20-74
  • A 200 ton, two-way trailer with a test load. 12/15/1933

    A 200 ton, two-way trailer with a test load. 12/15/1933

    31-al21-64
  • Union Pacific "Train of Tomorrow" on the Lomax trestle, at the upstream face of Boulder Dam.03/09/1934

    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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    31-al21-82
  • Track layout above Himix and Cement Blending Plants, showing bins where rock and sand are dumped. 04/17/1934

    Track layout above Himix and Cement Blending Plants, showing bins where rock and sand are dumped. 04/17/1934

    31-al21-87
    Beginning construction on Six Companies railroad and highway, which will lead to the upper portals of the Nevada diversion tunnels. 05/23/1931
    Six Companies Inc. employees aligning and oiling six miles of road down Hemenway Wash, toward the Upper Portals. 11/19/1931
    Workers laying a 6 inch air line across the first suspension bridge. 05/22/1931
    Upstream steel suspension bridge under construction, will first be used for transporting excavated muck from the diversion tunnels. 01/01/1932
    Pile and trestle road crossing the Colorado River. 02/10/1932
    Dumping materials at temporary pile bridge to complete diversion of the Colorado River. 11/13/1932
    Excavation operations on Cableway Bench No. 7 and No. 8, Nevada side. 08/07/1932
    A 200 ton, two-way trailer with a test load. 12/15/1933
    Union Pacific "Train of Tomorrow" on the Lomax trestle, at the upstream face of Boulder Dam.03/09/1934
    Track layout above Himix and Cement Blending Plants, showing bins where rock and sand are dumped. 04/17/1934