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

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

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