Search for exactly "Construction workers"

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51. Construction worker in bulldozer in front of diversion tunnel portal
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52. Worker inside drill sharpening station
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53. Electric shovel loading rocks into dump truck
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54. Worker sitting in dump truck being loaded by power shovel
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55. Dump truck unloading debris during construction of muck disposal road
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56. Invert concrete pouring forms inside diversion tunnel
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57. Steel form for diversion tunnel lining being hoisted into Black Canyon
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58. Section of a concrete-pouring jumbo standing outside of a diversion tunnel
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59. Worker operating heavy equipment at Hoover Dam site.
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60. View of two hundred ton two-way trailer, with test load
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61. Constructing highway to dam site
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62. Construction at Hoover Dam
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63. Nevada power house at Hoover Dam construction site
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64. Downsteam view of Hoover Dam, showing power house construction
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65. Power house under construction at Hoover Dam site
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66. Top of Hoover Dam, during construction
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67. View of bridge across Hoover Dam during construction
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68. Building of intake tower, Hoover Dam site
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69. Construction at Hoover Dam, inside a tunnel
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70. View of no. 1 plug showing the arch and raise
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71. Nevada valve house roof, looking upstream.
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72. Switchyard control house, yard and present substation -- Hoover Dam site
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73. Cleanup site at lower portal of Hoover Dam
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74. View inside a tunnel at Hoover Dam site
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75. Looking upstream at Hoover Dam during construction
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76. Top of Hoover Dam during construction
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77. View of switchyard at Hoover Dam site
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78. Workers in transport buses
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79. Water outlets at Hoover Dam during construction
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80. Crew working at Hoover Dam site
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81. Construction crew at bottom of Boulder Canyon
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82. Men operating heavy equipment at Hoover Dam site.
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83. Digging diversion tunnels at Hoover Dam.
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84. Construction in Black Canyon
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85. No. 5 intake tower finished to elevation 1232, showing curtain wall
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86. Blasting at Hoover Dam site
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87. Cement work -- Hoover Dam
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88. Construction of Hoover Dam diversion tunnel
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89. Work on cofferdam -- Hoover Dam
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90. Hoover Dam construction
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91. Temporary cableway spanning the Colorado River near Lookout Point
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92. View showing method of finishing slabs in invert lining.
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93. Close-up of trimming jumbo
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94. Construction bridges across the Colorado River
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95. Hoover Dam site -- workers welding
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96. Union Pacific Streamline train at the dam site
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97. Gantry crane inside diversion tunnel no. 3
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98. Construction of steel forms for the lining of the diversion tunnels
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99. Dam workers return to Boulder City after shift
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100. Workers laying railroad track near Boulder Canyon
 

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