Search for exactly "Tunnels"

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51. Close-up of workers using a drilling jumbo inside a diversion tunnel
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52. Construction worker in bulldozer in front of diversion tunnel portal
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53. Construction workers using a drilling jumbo inside a diversion tunnel
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54. Invert concrete pouring forms inside diversion tunnel
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55. Gantry crane inside diversion tunnel no. 3
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56. Invert forms inside diversion tunnel no. 3
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57. Concrete lining inside diversion tunnel no. 3
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58. Concrete lining inside diversion tunnel no. 2
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59. Concrete side wall lining in diversion tunnel no. 3
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60. Construction of steel forms for the lining of the diversion tunnels
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61. Detail of a sidewall jumbo inside diversion tunnel no. 3
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62. Interior of spillway tunnel, Hoover Dam site
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63. Interior of diversion tunnel during Hoover Dam construction
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64. Forms for transition at the downstream plug of Diversion Tunnel No. 2.
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65. Excavation for downstream plug, Diversion Tunnel No. 2.
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66. Excavation for downstream plug, Diversion Tunnel No. 3.
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67. Aerial view of Hoover Dam construction site looking upstream on the Colorado River
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68. Concrete pouring forms inside lower no. 2 plug
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69. View of railroad tracks being laid at Hoover Dam site.
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70. Construction on the Nevada power house
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71. Construction on the no. 4 penstock raise
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72. Construction in the no. 4 penstock raise
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73. Construction inside the upper no. 3 plug
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74. Construction in the no. 1 penstock raise
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75. Switchyard control circuit tunnel under construction -- Hoover Dam site
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76. Construction at Hoover Dam, inside a tunnel
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77. Construction of the Arizona power house
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78. Upper portal trashrack for diversion tunnel no. 1, on the Nevada side.
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79. Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug
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80. Looking downstream into no. 4 raise, showing close-up of portal forms.
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81. Looking upstream through penstock tunnel no. 5
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82. Number 3 plug and raise
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83. View of no. 4 plug, Hoover Dam site
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84. View inside a tunnel at Hoover Dam site
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85. Construction inside tunnel, Hoover Dam site
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86. Interior of diversion tunnel showing pipe
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87. Interior of tunnel during Hoover Dam construction
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88. Interior of Hoover Dam diversion tunnel during construction
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89. Hoover Dam during construction
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90. Interior of diversion tunnel during Hoover Dam construction
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91. Diversion tunnel no. 1 trashrack and counterweight assembly just prior to the diverting of the...
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92. Night view of the diversion tunnels
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93. Road tunnel portal
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94. Looking upstream toward no. 1 upstream plug, showing approximately 7,100 second feet of water being...
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95. Crew working at Hoover Dam site
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96. Diversion tunnel under construction - Hoover Dam
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97. Digging diversion tunnels at Hoover Dam.
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98. Construction in Black Canyon
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99. Hoover Dam -- downstream face
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100. View of Hoover Dam from downstream on the Colorado River
 

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