
51. Hoover Dam from the downstream side
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52. Hoover Dam from the downstream side with bridge and buildings
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53. Hoover Dam under construction
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54. Lower portals of Diversion Tunnels No. 3 and No. 4, during the flood.
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55. Construction of the highway which will cross the top of the dam
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56. View of Hoover Dam construction, early stage
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57. Diversion tunnels during Hoover Dam construction
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58. Blasting at Hoover Dam construction site.
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59. Panoramic view of the Upper Cofferdam, looking downstream
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60. Concrete pouring forms below a cofferdam in the Hoover Dam construction site
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61. Water flowing into Colorado River, June 16, 1933
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62. Aerial view of concrete pouring in the Hoover Dam construction site
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63. Concrete pouring forms in the Hoover Dam construction site
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64. Boulder Canyon.
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65. Construction workers on cliffs in Boulder Canyon.
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66. Construction workers at bottom of Boulder Canyon
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67. Nevada Spillway, looking upstream.
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68. Construction of the bases of the Arizona intake towers
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69. Arizona intake tower derrick.
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70. Construction on the Nevada intake towers
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71. Construction on the upstream face of Hoover Dam
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72. View taken looking upstream on the Colorado River of the Hoover Dam construction site
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73. Construction of the Arizona power house foundations
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74. Construction on the foundation of the Arizona power house
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75. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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76. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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77. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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78. Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River
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79. Construction on the Nevada intake towers
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80. Construction on the Arizona intake towers and spillway
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81. Construction on the Nevada power house
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82. Construction on the power house footings
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83. Workers on the Colorado River
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84. View of railroad tracks being laid at Hoover Dam site.
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85. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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86. Aerial view of the Hoover Dam construction site looking downstream from the Arizona side
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87. Hoover Dam construction site viewed from the downstream cofferdam
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88. Construction on the Arizona power house
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89. Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River
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90. Construction on the Arizona spillway
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91. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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92. Looking upstream in Black Canyon, showing the downstream face of Boulder Dam.
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93. Panoramic view of Hoover Dam and area during construction
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94. Blasting and construction on Hoover Dam
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95. Boulder Dam, Hoover Dam looking upstream from the Nevada side.
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96. Beginning blasting for the Hoover Dam
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97. View of construction on roads around the Arizona spillway
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98. View of the Hoover Dam costruction site from the lower cofferdam
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99. Night view of the diversion tunnels
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100. Downstream view of Hoover Dam construction site
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