Search for exactly "Tunnels"

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101. View of Hoover Dam from downstream on the Colorado River
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102. Hoover Dam from the downstream side
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103. Hoover Dam from downstream side
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104. Aerial view of Hoover Dam
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105. Outlet works -- Hoover Dam
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106. Aerial view of Hoover Dam
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107. Aerial view of Hoover Dam
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108. Construction of Hoover Dam
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109. Looking upstream at the upper end of no. 1 plug, showing forms for the intake...
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110. Looking upstream into no. 1 plug, showing the placing of the high pressure valves and...
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111. Agitators dumping concrete into buckets
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112. Upstream face of Hoover Dam, and the Nevada intake towers
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113. Hoover Dam
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114. Dowstream face -- Hoover Dam
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115. Hoover Dam and surrounding area
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116. Construction -- Hoover Dam
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117. Hoover Dam construction
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118. Blasting at Hoover Dam site
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119. Inside a diversion tunnel -- Hoover Dam construction
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120. Construction in diversion tunnel -- Hoover Dam
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121. Construction of diversion tunnel at Hoover Dam
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122. Construction workers in diversion tunnel, Hoover Dam site
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123. Diversion tunnel under construction at Hoover Dam site
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124. Construction of Hoover Dam diversion tunnel
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125. Construction -- Hoover Dam -- Diversion tunnel
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126. Construction of Hoover Dam diversion tunnel
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127. Construction of Hoover Dam diversion tunnel and portal
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128. Construction of Hoover Dam
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129. Construction workers inside Hoover Dam diversion tunnel
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130. Portals, Hoover Dam construction
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131. Preliminary construction at Hoover Dam site
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132. Hoover Dam construction
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133. Hoover Dam construction -- various phases
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134. Construction of Hoover Dam
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135. Diversion tunnel -- Hoover Dam
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136. Construction -- Hoover Dam
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137. Hoover Dam construction
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138. Hoover Dam construction
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139. Hoover Dam construction
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140. Aerial view of Hoover Dam and surrounding area
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141. Aerial view of Hoover Dam and surrounding area
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142. Hoover Dam construction
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143. Aerial view -- Hoover Dam construction
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144. View showing method of finishing slabs in invert lining.
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145. Hoover Dam -- retouched photo
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146. Hoover Dam -- retouched photo
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147. Trucks hauling concrete in the diversion tunnel
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148. Aerial view of Hoover Dam
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149. Boulder Canyon dam : the essence of the Swing-Johnson Bill ; Boulder Dam : from...
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150. Colorado River problem
 

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