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

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1. Hoover Dam construction equipment
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2. Crew operating construction equipment at Hoover Dam site
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3. Men operating heavy equipment at Hoover Dam site.
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4. Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam.
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5. Hoover Dam site, looking upstream
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6. Penstock tunnel piping
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7. Trash rack structure being installed in front of diversion tunnel no. 2
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8. Construction near the upper portals of diversion tunnels no. 1 and no. 2
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9. Electric shovel loading rocks into dump truck
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10. Worker sitting in dump truck being loaded by power shovel
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11. Dump truck unloading debris during construction of muck disposal road
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12. Invert concrete pouring forms inside diversion tunnel
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13. Gantry crane inside diversion tunnel no. 3
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14. Side-wall jumbo inside diversion tunnel
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15. Construction of steel forms for the lining of the diversion tunnels
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16. Steel form for diversion tunnel lining being hoisted into Black Canyon
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17. Bucket skips being filled with "muck" from the deep inner gorge of Black Canyon.
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18. Workers laying railroad track near Boulder Canyon
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19. Section of a concrete-pouring jumbo standing outside of a diversion tunnel
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20. Cut-off trench at upstream side of Hoover Dam.
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21. Nevada spillway during construction of Hoover Dam
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22. Men working on Hoover Dam.
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23. Men operating heavy equipment at Hoover Dam site.
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24. Floor of Black Canyon
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25. Black Canyon
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26. Himix Concrete Plant at Hoover Dam site
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27. Close-up of Hoover Dam concrete pouring construction taken from the Arizona side, looking downstream
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28. Excavation for downstream plug, Diversion Tunnel No. 2.
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29. View of two hundred ton two-way trailer, with test load
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30. Construction on Hoover Dam, looking downstream on the Colorado River
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31. View looking into power house block A-5.
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32. Excavation for bridge abutment in Arizona spillway.
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33. Looking downstream over the top of Hoover Dam
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34. Interior of penstock tunnel -- Hoover Dam construction site
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35. Constructing highway to dam site
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36. Producing electricity at the construction site
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37. Building Black Canyon Highway to Hoover Dam site
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38. Construction workers at Hoover Dam.
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39. Power house under construction - Hoover Dam site
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40. Section of penstock pipe being lifted by cable
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41. Construction on the no. 4 penstock raise
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42. Construction on the four intake towers in Hoover Dam
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43. Looking downstream on the Hoover Dam construction site
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44. Top of Hoover Dam, during construction
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45. Top of Hoover Dam, during construction
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46. View of Arizona spillway during construction
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47. Switchyard control circuit tunnel under construction -- Hoover Dam site
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48. View of no. 1 plug showing the arch and raise
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49. View inside a tunnel at Hoover Dam site
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50. Construction on the Arizona power house
 

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