Search for exactly "Construction workers", all of "Transportation"

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1. Construction workers inside Hoover Dam diversion tunnel
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2. Hoover Dam site, looking downstream
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3. Unloading huge pipes -- Hoover Dam site
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4. Hoover Dam construction, looking down on top
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5. Nevada power house at Hoover Dam construction site
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6. Downsteam view of Hoover Dam, showing power house construction
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7. Switchyard control house, yard and present substation -- Hoover Dam site
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8. Workers in transport buses
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9. Construction of Hoover Dam diversion tunnel
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10. Work on cofferdam -- Hoover Dam
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11. Construction bridges across the Colorado River
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12. Union Pacific Streamline train at the dam site
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13. Dam workers return to Boulder City after shift
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14. Himix Concrete Plant at Hoover Dam site
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15. Top of Hoover Dam, during construction
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16. Transport trucks at Hoover Dam site
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17. Penstocks at Hoover Dam construction site
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18. Penstock pipes at Babcock & Wilcox Plant
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19. Penstock pipes at Babcock & Wilcox Plant
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20. Penstock pipe at Babcock & Wilcox Plant
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21. Hydraulic turbine for Hoover Dam
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22. Construction of Hoover Dam
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23. Hoover Dam site, looking upstream
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24. Nevada spillway during construction of Hoover Dam
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25. Looking downstream on the Hoover Dam construction site
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26. View of Arizona spillway during construction
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27. Final pour in the slot, Hoover Dam
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28. Switchyard control circuit tunnel under construction -- Hoover Dam site
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29. Power shovel and trucks opening up an adit
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30. Day shift workers boarding transports for the return journey to Boulder City
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31. Train car dumping gravel into hopper at gravel plant
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32. Portals, Hoover Dam construction
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33. Construction of Hoover Dam
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34. Penstock pipes at Babcock & Wilcox Plant
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35. Upper portals -- Hoover Dam site
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36. Construction of gravel plant near Hoover Dam site
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37. Construction at lower portal of Hoover Dam
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38. Power houses being constructed at Hoover Dam
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39. Construction of Hoover Dam
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40. Trucks hauling concrete in the diversion tunnel
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41. View of power houses being constructed at the Hoover Dam site
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42. "Big Bertha" transporting dam workers
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43. Six Companies Inc. truck, employees
 

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