1. Cape Horn on the Colorado River showing cliff buildings
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2. Construction of Hoover Dam
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3. Hoover Dam construction site, looking upstream
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4. Aerial view of the future site of Hoover Dam
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5. Hoover Dam construction site
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6. Construction of Hoover Dam
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7. Hoover Dam, looking downstream
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8. Hoover Dam construction, looking upstream
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9. Hoover Dam construction, looking upstream
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10. Hoover Dam construction, looking upstream
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11. Hoover Dam construction, looking upstream
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12. Hoover Dam construction, looking upstream
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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. View of Hoover Dam construction, early stage
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18. Low level concrete mixing plant seen from the Arizona side of the Colorado River
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19. Black Canyon during dam construction
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20. Diversion tunnels during Hoover Dam construction
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21. One of the construction sites in Boulder Canyon.
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22. Blasting at Hoover Dam construction site.
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23. Construction on the upstream face of Hoover Dam
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24. Construction of the Arizona power house foundations
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25. Construction on the foundation of the Arizona power house
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26. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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27. Construction on the power house footings
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28. Aerial photo of Hoover Dam construction site
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29. Bridge across Boulder Canyon at Hoover Dam site.
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30. Hoover Dam construction site viewed from the downstream cofferdam
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31. Construction on the Arizona power house
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32. View of construction on roads around the Arizona spillway
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33. Panorama view, showing Six Companies Inc. work on the Arizona side of Black Canyon Highway.
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34. Aerial view of Hoover Dam, looking upstream on the Colorado River
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35. Hoover Dam construction site viewed from downstream
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36. Cement mixing plant at Hoover Dam construction site
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37. Hoover Dam construcion -- blasting
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38. High scalers -- Hoover Dam site
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39. High Scalers at Hoover Dam site
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40. Colorado River -- Hoover Dam site
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41. Hoover Dam construction
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42. Hoover Dam construction
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43. Colorado River, early stages of dam construction
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44. Hoover Dam construction
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45. Hoover Dam construction
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46. Hoover Dam construction
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47. Colorado River -- Hoover Dam construction site
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48. Hoover Dam construction -- various phases
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49. Hoover Dam construction
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50. Hoover Dam construction
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