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1. Hoover Dam construction -- various phases
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2. Construction scene at Hoover Dam site
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3. Power house under construction at Hoover Dam site
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4. Construction on crest of Hoover Dam
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5. Hoover Dam construction
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6. Inside a diversion tunnel -- Hoover Dam construction
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7. Construction workers inside Hoover Dam diversion tunnel
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8. Hoover Dam construction
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9. Hoover Dam construction equipment
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10. Construction of gravel plant near Hoover Dam site
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11. Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam.
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12. Concrete form construction work
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13. Construction worker in bulldozer in front of diversion tunnel portal
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14. Construction workers at Hoover Dam
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15. Nevada spillway during construction of Hoover Dam
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16. Construction workers on cliffs in Boulder Canyon.
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17. Floor of Black Canyon
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18. Black Canyon
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19. Close-up of Hoover Dam concrete pouring construction taken from the Arizona side, looking downstream
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20. Construction on Hoover Dam, looking downstream on the Colorado River
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21. Interior of penstock tunnel -- Hoover Dam construction site
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22. Constructing highway to dam site
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23. Construction workers at Hoover Dam.
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24. Construction at Hoover Dam
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25. Nevada power house at Hoover Dam construction site
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26. Downsteam view of Hoover Dam, showing power house construction
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27. Power house under construction - Hoover Dam site
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28. Interior view of a power house -- Hoover Dam construction site
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29. Construction on the no. 4 penstock raise
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30. Construction on the no. 4 penstock raise
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31. Construction on the four intake towers in Hoover Dam
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32. Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam
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33. Construction in the no. 4 penstock raise
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34. Construction on the Arizona power house
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35. Looking downstream on the Hoover Dam construction site
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36. Top of Hoover Dam, during construction
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37. Top of Hoover Dam, during construction
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38. View of bridge across Hoover Dam during construction
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39. View of Arizona spillway during construction
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40. Hoover Dam construction, looking down on top
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41. Intake towers during construction of Hoover Dam
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42. Construction at Hoover Dam, inside a tunnel
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43. Nevada valve house roof, looking upstream.
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44. Looking upstream at Hoover Dam during construction
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45. Top of Hoover Dam during construction
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46. View of construction on roads around the Arizona spillway
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47. Construction on the Nevada spillway
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48. Construction on the Arizona power house
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49. Water outlets at Hoover Dam during construction
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50. Construction on the power houses viewed from the valve house catwalk
 

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