1. Hoover Dam site, looking upstream
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2. Hoover Dam site, looking downstream
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3. Union Pacific Streamline train at the dam site
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4. Dam workers return to Boulder City after shift
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5. Nevada spillway during construction of Hoover Dam
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6. Himix Concrete Plant at Hoover Dam site
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7. Unloading huge pipes -- Hoover Dam site
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8. Nevada power house at Hoover Dam construction site
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9. Downsteam view of Hoover Dam, showing power house construction
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10. View of power houses being constructed at the Hoover Dam site
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11. Looking downstream on the Hoover Dam construction site
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12. Top of Hoover Dam, during construction
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13. View of Arizona spillway during construction
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14. Final pour in the slot, Hoover Dam
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15. Switchyard control circuit tunnel under construction -- Hoover Dam site
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16. Hoover Dam construction, looking down on top
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17. Switchyard control house, yard and present substation -- Hoover Dam site
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18. Workers in transport buses
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19. Power shovel and trucks opening up an adit
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20. Day shift workers boarding transports for the return journey to Boulder City
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21. Train car dumping gravel into hopper at gravel plant
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22. Construction of Hoover Dam diversion tunnel
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23. Construction workers inside Hoover Dam diversion tunnel
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24. Portals, Hoover Dam construction
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25. Transport trucks at Hoover Dam site
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26. Penstocks at Hoover Dam construction site
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27. Penstock pipes at Babcock & Wilcox Plant
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28. Construction of Hoover Dam
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29. Penstock pipes at Babcock & Wilcox Plant
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30. Penstock pipe at Babcock & Wilcox Plant
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31. Hydraulic turbine for Hoover Dam
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32. Upper portals -- Hoover Dam site
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33. Work on cofferdam -- Hoover Dam
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34. Construction of gravel plant near Hoover Dam site
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35. Construction at lower portal of Hoover Dam
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36. Power houses being constructed at Hoover Dam
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37. Construction of Hoover Dam
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38. Construction of Hoover Dam
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39. Construction bridges across the Colorado River
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40. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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41. Construction near the upper portals of diversion tunnels no. 1 and no. 2
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42. Construction workers with electric light reflectors standing by a truck in Black Canyon
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43. Trains on Elevation 720 Railroad Bench, hauling conrete to Hoover Dam.
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44. Black Canyon
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45. View of two hundred ton two-way trailer, with test load
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46. Constructing highway to dam site
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47. Construction at Hoover Dam
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48. Workers on the Colorado River
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49. Construction of the Arizona power house
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50. Hoover Dam -- valve outlets in operation on the Arizona side
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