1. Train at Himix Concrete Plant -- Hoover Dam site
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2. First concrete in Hoover Dam
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3. Pouring concrete on Hoover Dam
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4. Concrete bucket on flat car
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5. Third millionth cubic yard of concrete being lowered to Boulder Dam
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6. Concrete form construction work
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7. Concrete pouring forms on the Hoover Dam construction site seen from downstream
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8. Concrete pouring forms and construction on the intake towers at Hoover Dam
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9. Low mix concrete plant
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10. High level concrete plant
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11. Concrete pouring forms below a cofferdam in the Hoover Dam construction site
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12. Aerial view of concrete pouring in the Hoover Dam construction site
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13. Concrete pouring forms in the Hoover Dam construction site
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14. Close-up of Hoover Dam concrete pouring construction taken from the Arizona side, looking downstream
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15. Construction on the foundation of the Arizona power house
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16. Forms for Arizona power house retaining wall.
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17. Looking downstream over the top of Hoover Dam
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18. Aerial photo of Hoover Dam construction site
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19. Aerial view of the Hoover Dam construction site looking downstream from the Arizona side
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20. Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam
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21. Aerial view of construction on the top of Hoover Dam
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22. Final pour in the slot, Hoover Dam
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23. Pipe gallery of the Nevada power house
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24. Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug
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25. Number 3 plug and raise
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26. Looking into the Arizona spillway raise.
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27. Pouring concrete -- Hoover Dam
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28. Hoover Dam -- Cement work
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29. Construction of Hoover Dam
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30. Hoover Dam construction
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31. Hoover Dam construction
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32. Hoover Dam construction
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33. Hoover Dam construction site, looking upstream
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34. Construction of Hoover Dam
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35. Construction of Hoover Dam
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36. Night view of Hoover Dam under construction
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37. Construction of Hoover Dam
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38. Hoover Dam, looking upstream
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39. Hoover Dam construction, looking upstream
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40. Union Pacific Streamline train at the dam site
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41. Hoover Dam from the downstream side
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42. Hoover Dam construction, looking upstream
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43. Hoover Dam construction, looking upstream
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44. Hoover Dam construction, looking upstream
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45. Hoover Dam construction, looking upstream
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46. Hoover Dam construction, looking upstream
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47. Hoover Dam construction, looking upstream
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48. Hoover Dam construction, looking upstream
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49. Hoover Dam construction, looking upstream
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50. Concrete pouring forms in the Hoover Dam construction site in Black Canyon
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