Search for all of "Tunnels", all of "Diversion Tunnels", all of "Construction Workers"

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1. Construction near the upper portals of diversion tunnels no. 1 and no. 2
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2. Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...
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3. Side-wall jumbo inside diversion tunnel
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4. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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5. First 40 foot slab of concrete poured in lining diversion tunnels
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6. Hoover Dam construcion -- blasting
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7. Workers in diversion tunnels -- Hoover Dam site
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8. Close-up of trimming jumbo
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9. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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10. Crane transporting mixers in diversion tunnel at Hoover Dam site
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11. Trash rack structure being installed in front of diversion tunnel no. 2
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12. Workers and drilling jumbo inside diversion tunnel no. 4
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13. Close-up of workers using a drilling jumbo inside a diversion tunnel
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14. Construction worker in bulldozer in front of diversion tunnel portal
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15. Construction workers using a drilling jumbo inside a diversion tunnel
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16. Invert concrete pouring forms inside diversion tunnel
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17. Gantry crane inside diversion tunnel no. 3
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18. Concrete lining inside diversion tunnel no. 2
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19. Forms for transition at the downstream plug of Diversion Tunnel No. 2.
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20. Excavation for downstream plug, Diversion Tunnel No. 2.
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21. Excavation for downstream plug, Diversion Tunnel No. 3.
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22. Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug
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23. Interior of Hoover Dam diversion tunnel during construction
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24. Diversion tunnel no. 1 trashrack and counterweight assembly just prior to the diverting of the...
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25. Looking upstream at the upper end of no. 1 plug, showing forms for the intake...
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26. Looking upstream into no. 1 plug, showing the placing of the high pressure valves and...
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27. Blasting at Hoover Dam site
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28. Inside a diversion tunnel -- Hoover Dam construction
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29. Construction workers in diversion tunnel, Hoover Dam site
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30. Construction of Hoover Dam diversion tunnel
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31. Construction of Hoover Dam diversion tunnel
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32. Construction workers inside Hoover Dam diversion tunnel
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33. Portals, Hoover Dam construction
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34. Construction of Hoover Dam
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35. Diversion tunnel -- Hoover Dam
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36. Hoover Dam construction
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37. View showing method of finishing slabs in invert lining.
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38. Trucks hauling concrete in the diversion tunnel
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39. Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion...
 

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