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

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1. Crews and equipment in Black Canyon at dam site
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2. Men operating heavy equipment at Hoover Dam site.
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3. Worker operating heavy equipment at Hoover Dam site.
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4. Men operating heavy equipment at Hoover Dam site.
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5. Crew operating construction equipment at Hoover Dam site
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6. Hoover Dam construction equipment
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7. Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam.
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8. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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9. Hoover Dam site, looking upstream
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10. Crane transporting mixers in diversion tunnel at Hoover Dam site
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11. Hoover Dam site, looking downstream
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12. First concrete in Hoover Dam
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13. Hoover Dam, looking downstream
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14. Penstock tunnel piping
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15. Trash rack structure being installed in front of diversion tunnel no. 2
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16. Construction near the upper portals of diversion tunnels no. 1 and no. 2
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17. Workers and drilling jumbo inside diversion tunnel no. 4
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18. Close-up of workers using a drilling jumbo inside a diversion tunnel
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19. Construction worker in bulldozer in front of diversion tunnel portal
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20. Worker inside drill sharpening station
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21. Construction workers using a drilling jumbo inside a diversion tunnel
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22. Electric shovel loading rocks into dump truck
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23. Worker sitting in dump truck being loaded by power shovel
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24. Dump truck unloading debris during construction of muck disposal road
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25. Invert concrete pouring forms inside diversion tunnel
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26. Gantry crane inside diversion tunnel no. 3
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27. Concrete lining inside diversion tunnel no. 2
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28. Side-wall jumbo inside diversion tunnel
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29. Construction of steel forms for the lining of the diversion tunnels
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30. Steel form for diversion tunnel lining being hoisted into Black Canyon
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31. Bucket skips being filled with "muck" from the deep inner gorge of Black Canyon.
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32. Construction workers at Hoover Dam
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33. Workers laying railroad track near Boulder Canyon
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34. Construction scene at Hoover Dam site
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35. High scalers preparing anchorages in Black Canyon
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36. Construction workers with electric light reflectors standing by a truck in Black Canyon
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37. Section of a concrete-pouring jumbo standing outside of a diversion tunnel
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38. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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39. Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...
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40. Cut-off trench at upstream side of Hoover Dam.
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41. Nevada spillway during construction of Hoover Dam
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42. Men working on Hoover Dam.
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43. Construction worker at Hoover Dam.
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44. Construction workers on cliffs in Boulder Canyon.
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45. Floor of Black Canyon
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46. Black Canyon
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47. Himix Concrete Plant at Hoover Dam site
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48. Close-up of Hoover Dam concrete pouring construction taken from the Arizona side, looking downstream
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49. Excavation for downstream plug, Diversion Tunnel No. 2.
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50. View of two hundred ton two-way trailer, with test load
 

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