1. Hoover Dam under construction
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2. Building Black Canyon Highway to Hoover Dam site
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3. Blasting at Hoover Dam site
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4. View taken looking upstream on the Colorado River of the Hoover Dam construction site
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5. Colorado River -- Hoover Dam site
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6. Arizona intake tower derrick.
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7. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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8. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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9. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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10. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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11. Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River
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12. Aerial view of the Hoover Dam construction site in Black Canyon showing the upstream dam...
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13. View of the Hoover Dam construction site looking downstream on the Colorado River
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14. Looking upstream toward the Nevada intake towers, showing the intake bridge girders in place.
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15. Blasting and construction on Hoover Dam
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16. Hoover Dam construction, looking upstream
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17. Black Canyon prior to dam construction
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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 construction, looking upstream
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22. Aerial view of the Hoover Dam construction site looking downstream from the Arizona side
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23. Hoover Dam construcion -- blasting
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24. Hoover Dam construction -- various phases
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25. Producing electricity at the construction site
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26. Hoover Dam construction
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27. Crews and equipment in Black Canyon at dam site
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28. Looking up Hoover Dam during construction of the diversion tunnels
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29. Hoover Dam from the downstream side
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30. Upstream face of Hoover Dam, and the Arizona intake towers
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31. Hoover Dam during construction
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32. Steel form for diversion tunnel lining being hoisted over the Colorado River
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33. Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.
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34. Hoover Dam construction, looking upstream
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35. Hoover Dam construction, looking upstream
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36. Black Canyon
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37. Hoover Dam construction
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38. Hoover Dam under construction
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39. Hoover Dam under construction
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40. Temporary cableway spanning the Colorado River near Lookout Point
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41. Gas-air shovel caught in the flooded Colorado River
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42. Construction on the power houses and valve houses viewed from the top of Hoover Dam
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43. Blasting -- Hoover Dam site
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44. One of the construction sites in Boulder Canyon.
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45. Looking downstream on the Hoover Dam construction site
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46. Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...
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47. Hoover Dam construction
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48. Floor of Black Canyon
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49. Spillway and Hoover Dam during construction
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50. Hoover Dam construction
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