Search for all of "Tunnels", all of "Trucks"

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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. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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4. Hoover Dam construcion -- blasting
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5. Workers in diversion tunnels -- Hoover Dam site
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6. Construction of Hoover Dam
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7. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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8. Construction of Hoover Dam
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9. Construction of Hoover Dam
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10. Concrete lining inside diversion tunnel no. 2
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11. Excavation for downstream plug, Diversion Tunnel No. 2.
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12. Switchyard control circuit tunnel under construction -- Hoover Dam site
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13. Construction of the Arizona power house
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14. Hoover Dam during construction
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15. Construction of Hoover Dam diversion tunnel
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16. Construction of Hoover Dam
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17. Construction workers inside Hoover Dam diversion tunnel
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18. Portals, Hoover Dam construction
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19. Preliminary construction at Hoover Dam site
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20. Hoover Dam construction -- various phases
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21. Construction of Hoover Dam
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22. Construction -- Hoover Dam
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23. Hoover Dam construction
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24. Hoover Dam construction
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25. Aerial view -- Hoover Dam construction
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26. Trucks hauling concrete in the diversion tunnel
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27. Construction on the Nevada power house
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28. Construction on the Arizona power house
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29. Downstream view of Hoover Dam construction
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30. View of Hoover Dam construction from the top of the dam
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31. Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion...
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32. Hoover Dam construction site, looking upstream from the lower portals road
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33. Construction on Hoover Dam and the power houses looking upstream from the lower portals road
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34. Hoover Dam -- outlet works
 

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