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101. Power house under construction at Hoover Dam site
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102. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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103. Aerial view of the Hoover Dam construction site looking downstream from the Arizona side
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104. Close-up of no. 3 Arizona intake tower, showing the cylinder gates being placed.
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105. Close-up of the Arizona intake towers, from the high catwalk.
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106. Hoover Dam construction site viewed from the downstream cofferdam
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107. Construction on the Nevada power house
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108. Construction on the Nevada power house in the downstream cofferdam
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109. Construction on the Arizona power house
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110. Construction on the Nevada spillway
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111. Section of penstock pipe being lifted by cable
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112. Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam
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113. Aerial view of construction on the top of Hoover Dam
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114. Construction on the Nevada spillway
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115. Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River
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116. Construction on the no. 4 penstock raise
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117. Construction on the Arizona spillway
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118. Construction on the no. 4 penstock raise
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119. Construction on the four intake towers in Hoover Dam
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120. Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam
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121. Close-up of the Nevada powerhouse, showing the draft tubes.
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122. Construction on the Nevada power house viewed from the Arizona valve bench
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123. Construction on the Arizona power house viewed from the Nevada valve house bench
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124. Construction on the Arizona spillway and the no. 4 penstock raise in Black Canyon
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125. Aerial view of the Hoover Dam construction site in Black Canyon showing the upstream dam...
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126. Construction in the no. 4 penstock raise
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127. Construction inside the upper no. 3 plug
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128. Construction in the no. 1 penstock raise
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129. Construction on the Arizona intake towers
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130. Construction on the Nevada intake towers
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131. Close-up of formwork in the Arizona power house
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132. Construction on the Nevada power house
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133. Construction on the Arizona power house
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134. Looking downstream on the Hoover Dam construction site
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135. Top of Hoover Dam, during construction
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136. Top of Hoover Dam, during construction
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137. Nevada intake towers, Hoover Dam construction site
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138. Construction view of Hoover Dam, looking downstream
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139. Hoover Dam during construction
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140. View of the power house and valve houses from top of Hoover Dam
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141. View of bridge across Hoover Dam during construction
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142. Upstream face and intake towers of Hoover Dam during construction
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143. View of a spillway bridge during construction of Hoover Dam
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144. View of Arizona spillway during construction
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145. View of Nevada spillway during construction of Hoover Dam
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146. Final pour in the slot, Hoover Dam
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147. Building of intake tower, Hoover Dam site
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148. Hoover Dam under construction
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149. Arizona Black Canyon highway consruction
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150. Switchyard control circuit tunnel under construction -- Hoover Dam site
 

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