1. Crews and equipment in Black Canyon at dam site
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2. Hoover Dam construction -- transporting equipment
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3. Hoover Dam construction equipment
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4. Construction equipment -- Hoover Dam
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5. Hoover Dam construction site, looking upstream
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6. Hoover Dam site, looking upstream
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7. Hoover Dam site, looking downstream
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8. First concrete in Hoover Dam
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9. Hoover Dam, looking upstream
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10. Hoover Dam, looking downstream
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11. Hoover Dam construction, looking upstream
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12. Concrete pouring forms on the Hoover Dam construction site seen from downstream
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13. Hoover Dam construction, looking upstream
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14. Hoover Dam construction, looking upstream
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15. Hoover Dam construction, looking upstream
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16. Hoover Dam construction, looking upstream
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17. Hoover Dam construction, looking upstream
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18. Hoover Dam construction, looking upstream
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19. Hoover Dam construction, looking upstream
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20. Hoover Dam construction, looking upstream
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21. Hoover Dam under construction
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22. Dragline loading gravel
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23. Black Canyon during dam construction
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24. Bucket skips being filled with "muck" from the deep inner gorge of Black Canyon.
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25. One of the construction sites in Boulder Canyon.
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26. High scalers preparing anchorages in Black Canyon
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27. Dragline loading gravel into railroad side dump cars
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28. Panoramic view of the Upper Cofferdam, looking downstream
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29. Construction workers on cliffs in Boulder Canyon.
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30. Floor of Black Canyon
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31. Black Canyon
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32. Construction of the bases of the Arizona intake towers
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33. Arizona intake tower derrick.
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34. Construction on the Nevada intake towers
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35. Construction on the upstream face of Hoover Dam
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36. View taken looking upstream on the Colorado River of the Hoover Dam construction site
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37. Construction of the Arizona power house foundations
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38. Construction on the foundation of the Arizona power house
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39. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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40. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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41. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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42. Construction on the Nevada intake towers
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43. Construction on the Arizona intake towers and spillway
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44. Construction on the Nevada power house
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45. Construction on the power house footings
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46. Aerial photo of Hoover Dam construction site
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47. Producing electricity at the construction site
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48. Building Black Canyon Highway to Hoover Dam site
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49. Workers on the Colorado River
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50. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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