Search for all of "equipment", all of "Construction Workers", all of "Trucks"

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1. Men operating heavy equipment at Hoover Dam site.
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2. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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3. Construction near the upper portals of diversion tunnels no. 1 and no. 2
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4. Electric shovel loading rocks into dump truck
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5. Worker sitting in dump truck being loaded by power shovel
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6. Dump truck unloading debris during construction of muck disposal road
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7. Concrete lining inside diversion tunnel no. 2
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8. Construction workers with electric light reflectors standing by a truck in Black Canyon
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9. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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10. Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...
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11. Nevada spillway during construction of Hoover Dam
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12. Himix Concrete Plant at Hoover Dam site
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13. Excavation for downstream plug, Diversion Tunnel No. 2.
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14. Construction at Hoover Dam
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15. Nevada power house at Hoover Dam construction site
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16. Downsteam view of Hoover Dam, showing power house construction
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17. Looking downstream on the Hoover Dam construction site
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18. View of Arizona spillway during construction
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19. Final pour in the slot, Hoover Dam
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20. Switchyard control circuit tunnel under construction -- Hoover Dam site
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21. Switchyard control house, yard and present substation -- Hoover Dam site
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22. View of switchyard at Hoover Dam site
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23. View of construction on roads around the Arizona spillway
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24. Construction on the power houses viewed from the valve house catwalk
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25. Construction on the Arizona power house
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26. Hoover Dam construction
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27. Hoover Dam construcion -- blasting
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28. Workers in diversion tunnels -- Hoover Dam site
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29. Construction workers inside Hoover Dam diversion tunnel
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30. Upper portals -- Hoover Dam site
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31. Work on cofferdam -- Hoover Dam
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32. Construction of gravel plant near Hoover Dam site
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33. Trucks hauling concrete in the diversion tunnel
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34. Construction bridges across the Colorado River
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35. View of power houses being constructed at the Hoover Dam site
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36. Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion...
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37. Panorama view, showing Six Companies Inc. work on the Arizona side of Black Canyon Highway.
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38. Construction of Hoover Dam diversion tunnel
 

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