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

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1. Construction workers using a drilling jumbo inside a diversion tunnel
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2. Construction workers with electric light reflectors standing by a truck in Black Canyon
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3. Construction workers on cliffs in Boulder Canyon.
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4. Construction workers inside Hoover Dam diversion tunnel
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5. Construction workers at Hoover Dam
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6. Construction workers at Hoover Dam.
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7. Crane transporting mixers in diversion tunnel at Hoover Dam site
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8. Hoover Dam site, looking downstream
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9. First concrete in Hoover Dam
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10. Close-up of workers using a drilling jumbo inside a diversion tunnel
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11. Concrete lining inside diversion tunnel no. 2
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12. Construction scene at Hoover Dam site
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13. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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14. Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...
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15. Excavation for downstream plug, Diversion Tunnel No. 3.
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16. Closeup of cooling pipe layout in panel H-3.
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17. Unloading huge pipes -- Hoover Dam site
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18. Construction on the no. 4 penstock raise
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19. Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam
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20. Close-up of the Nevada powerhouse, showing the draft tubes.
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21. Construction in the no. 4 penstock raise
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22. Construction in the no. 1 penstock raise
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23. Hoover Dam construction, looking down on top
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24. Intake towers during construction of Hoover Dam
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25. Steel rails on the roof of the Nevada valve house awaiting concrete pouring
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26. Construction on the Nevada spillway
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27. Crew operating construction equipment at Hoover Dam site
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28. Hoover Dam construction
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29. Hoover Dam workers on canyon floor
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30. Inside a diversion tunnel -- Hoover Dam construction
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31. Workers in diversion tunnels -- Hoover Dam site
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32. Workers on the Colorado River
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33. Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam
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34. Construction on crest of Hoover Dam
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35. Hoover Dam construction
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36. Hoover Dam construcion -- blasting
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37. Pouring concrete -- Hoover Dam
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38. Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam.
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39. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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40. Hoover Dam, looking downstream
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41. Penstock tunnel piping
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42. Workers and drilling jumbo inside diversion tunnel no. 4
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43. Construction worker in bulldozer in front of diversion tunnel portal
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44. Worker inside drill sharpening station
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45. Electric shovel loading rocks into dump truck
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46. Worker sitting in dump truck being loaded by power shovel
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47. Dump truck unloading debris during construction of muck disposal road
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48. Invert concrete pouring forms inside diversion tunnel
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49. Steel form for diversion tunnel lining being hoisted into Black Canyon
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50. Section of a concrete-pouring jumbo standing outside of a diversion tunnel
 

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