Search for all of "Tunnels"

Grid | List | Tile

      Title Description
151 Object thumbnail
Some desert watering places in southeastern California and southwestern Nevada
152 Object thumbnail
Section of a concrete-pouring jumbo standing outside of a diversion tunnel A completed section of a form, or "jumbo," for pouring of concrete to create the diversion tunnel arches stands upon trestles in Black Canyon. Construction workers are seen working on the form.
153 Object thumbnail
Construction on the Nevada power house View of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. The partially finished dam face can be seen on the right, with concrete pouring forms and other construction equipment. Construction of the Nevada power...
154 Object thumbnail
Construction on the Arizona power house View of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. The partially finished dam face can be seen on the left, with concrete pouring forms and other construction equipment. Construction of the Arizona power...
155 Object thumbnail
Interior of penstock tunnel -- Hoover Dam construction site Interior view of number 4 raise and plug showing construction. Construction workers can be seen at the far end of the tunnel.
156 Object thumbnail
Close-up of formwork in the Arizona power house Construction workers are seen working amid the wood and steel framework during construction of the Arizona power house. Unfinished penstock tunnel portals can be seen in the canyon wall in the background.
157 Object thumbnail
Construction on the Nevada power house View of construction on the Nevada power house. The dam face is seen in the upper right. Unfinished penstock portals are seen in the canyon wall. Temporary buildings and construction equipment are seen in the cofferdam between the Nevada and...
158 Object thumbnail
Construction view of the valve house and portal area of Hoover Dam Shows the Nevada construction adits, valve house and plug adit portal. Note the absence of the compressor plant. The beginning of the upstream of the lower portal road tunnel is visible. Buildings and structures, roads, and cables are...
159 Object thumbnail
Downstream view of Hoover Dam construction Shows a downstream view of the Hoover Dam project from the crest of the dam. Power house and lower portals of diversion tunnels are seen. Buildings and structures, trucks and roads are visible also.
160 Object thumbnail
View of Hoover Dam construction from the top of the dam Shows Hoover Dam construction from the top of the dam looking down. The power house, valve houses, and lower portals of the diversion tunnels are visible. Various buildings and trucks are also shown. The Colorado River is...
161 Object thumbnail
Interior of diversion tunnel during Hoover Dam construction Interior view of a diversion tunnel, showing the water conduit being placed. Scaffolding is visible and the area is lit with electric lighting.
162 Object thumbnail
Looking into the Arizona spillway raise. View of construction inside the Arizona spillway raise. A concrete-pouring jumbo on tracks is being used for grouting. Other concrete pouring forms can be seen on the interior spillway walls.
163 Object thumbnail
Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion... View of the diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion tunnel no. 4 is being lowered (on the left). A line of construction workers can be seen standing on the bank of...
164 Object thumbnail
Downstream view of Hoover Dam construction site Viewpoint of dam construction from below the lower portals of the diversion tunnels. Muck disposal road shown on both sides of the river. Some trucks are visible in the foreground.
165 Object thumbnail
Construction on Hoover Dam and the power houses looking upstream from the lower portals road View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings...
166 Object thumbnail
Hoover Dam construction site, looking upstream from the lower portals road View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings,...
167 Object thumbnail
Construction on Hoover Dam and the power houses looking upstream from the lower portals road View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings, construction...
168 Object thumbnail
Aerial view of Hoover Dam, looking upstream on the Colorado River Aerial view of the Hoover Dam construction site in Black Canyon. Visible are the spillways, intake towers, dam face, diversion tunnels and construction on the power houses. Temporary buildings are seen in the cofferdam downstream of the dam face. The...
169 Object thumbnail
Hoover Dam -- downstream face Color transparency looking towards the downstream face of Hoover Dam. Part of the Colorado River and the portals to the diversion tunnels ares visible.
170 Object thumbnail
View of Hoover Dam from the downstream side of the Colorado River View of Hoover Dam from downstream on the Colorado River. Water is being discharged from the outlet works of the Nevada valve house on the left. Part of the Nevada power house and the central power house are seen at...
171 Object thumbnail
Hoover Dam -- upstream side Shows upstream side of the dam with the almost-finished intake towers. Also shows the mouth of a diversion tunnel and derrick cranes on both sides of the canyon. The reservoir (Lake Mead) has begun to fill.
172 Object thumbnail
Hoover Dam -- upstream side Shows upstream face of dam with almost-completed intake towers. The reservoir (Lake Mead) has started to fill, and a man is rowing a boat on the lake. The mouth of a diversion tunnel on the left side of the picture...
173 Object thumbnail
Upstream view of Black Canyon during early stage of Hoover Dam construction Aerial view looking upstream of the Colorado River in Black Canyon during the early stages of dam construction. Foot-bridge and truck bridge are visible spanning the Colorado River. Some construction fcilities and equipment are seen on dirt roads on...
174 Object thumbnail
Aerial view of Hoover Dam Aerial view of Hoover Dam with the outlet works on boths ides of the dam spewing water. Above the dam the reservoir (Lake Mead) is beginning to fill. Fortification Hill is in the background. the central power house...
175 Object thumbnail
Hoover Dam -- outlet works Shows the downstream face of the dam with the outlet works spewing water. The entrances to two of the diversion tunnels are visible. There is a dump truck parked on one of the side roads.
176 Object thumbnail
Outlet works -- Hoover Dam Upstream view of Hoover Dam, showing the Arizona outlet works spewing water. The power houses and part of the entrance to one diversion tunnel are visible.
177 Object thumbnail
Water discharging from the Nevada and Arizona outlet works into the Colorado River View of water discharging from the Nevada and Arizona outlet works in the valve houses into the Colorado River downstream from Hoover Dam in Black Canyon. Diversion tunnel portals and a steel bridge are seen in the foreground. Two of...
178 Object thumbnail
View of water discharging from the Nevada and Arizona outlet works into the Colorado River View of Hoover Dam from downstream on the Colorado River. Water is being discharged from the Nevada and Arizona outlet works in the valve houses. The diversion tunnel portals and a steel bridge are seen in the foreground. Cables are...
179 Object thumbnail
Bridge construction near Hoover Dam site "At lower portal mouths on Arizona side of river. Picture taken from Nevada side." (handwritten inscritpion on back of photo) Shows a temporary suspension bridge and several buildings near the lower portals of Hoover Dam. Cables are...
 

Subscribe to this Search