Photograph showing the water circulation system at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). A man looks at the camera while a pipe sprays a stream of water into the river. Several large ships and barges can be seen in the distance.

Photograph taken from a high angle of penstock units at Cazadero Dam/Station G. The pipes can be seen running downhill towards the in-progress powerhouse, with numerous workers.

Photograph, taken from across the river, of the Cazadero powerhouse/Station G. Part of the roof is incomplete, and three pipes run from the building up the hill. A stairway next to the pipes goes from the building to the top of the hill.

Photograph showing construction progress on the intake penstocks at the Cazadero Dam/Station G. Workers are visible in the center of the frame, and five large pipes are seen on the right. Construction debris can be seen throughout the image.

Photograph showing men working in a trench at Station E while installing a circulation water system (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). A ladder leads up from the trench towards a dirt wall, and several large pieces of pipe are on the ground.

Photograph showing a railroad train towing several large pieces of pipe on attached railroad cars. The train is traveling through an open area surrounded by dense forest, and four men can be seen in the frame in between the camera and train.

Photograph showing several large lengths of conduit pipe on the flat bed of a train car. A man in a hat stands inside the last piece of pipe, facing towards the camera. In the background is a dense forest, and pieces of wood and debris can be seen on the ground throughout the image.

Photograph taken from the front, looking at a pipe traveler moving along a track in a excavated dirt area. Two men ride at the top of the unit, while others can be seen below on the ground. A large metal pipe is being held in the unit, which appears to be attached to a pulley cable system.

Photograph taken from a side angle showing a pipe traveler machine being tested on a short length of pipe, in a recently cleared dirt area. Two individuals can be seen standing on top of the device.

Photograph taken from a side angle showing a roofed pipe traveler device, in a dirt ditch and area recently cleared of trees. One man can be seen in the pipe traveler, while another stands at ground level.

Photograph looking down a large pipe, showing the outline of a person.

Photograph taken from a hillside looking downward at Oak Grove Meadow. A large ditch can be seen extending into the distance near the center of frame. On the left side if a large pipe on a railway car. Trees and mountains can be seen in the distance.

Photograph showing pipes with concrete cradles at Frog Lake, in a newly logged area. A railroad track and small wooden bridge can be seen in the background.

Photograph showing an incomplete electrical bay at the Oak Grove dam, with several man visible throughout the frame. Electrical conduits can be seen on the floor, with wood and steel on the supporting walls. A dirt hillside can be seen in the background behind the far wall.

Photograph taken from a side angle showing a pipe traveler on a 68% grade, on the east slope of Cripple Creek knoll. It is traveling along a section of pipe, and appears to be emitting steam. Several men can be seen standing at ground level next to the pipe.

Photograph showing a group of men standing on large pipes. The men at the right of the frame look towards the camera, and are wearing hats with suit vests or dress shirts. They are Clark, Franklin T. Griffith, Fuller, Caldwell, and Osborne. Four men can be seen on the left side of the frame with tools, leaning towards the pipe work. A tunnel entrance can be seen in the background.

Photograph of Oak Grove Dam showing intake on river from high angle (Lake Harriet?). To the right of the intake, a small wooden building is at the top of a hillside, with several electrical lines visible. Below the building, a large pipe goes into the hillside.

Photograph looking down an underground tunnel. Lights and a large pipe run along the right wall into the distance. A train track is visible on the floor, as well as various pieces of debris against the left wall.

A blind war industry worker, wearing shaded glasses, leans down towards a machine holding a pipe. Next to him is another man, wearing a suit and placing his hand on the first man’s back. They are in a workshop at an unidentified industrial facility in the Portland area (negative 1 of 9). Original sleeve title: War industry workers - blind workers; Doernbecher furniture; Kaiser, Swan Island; Willamette Iron and Steel Corp.

Photograph showing four men working on electrical utilities while wearing matching bowler hats. All of the men look towards different directions, and are surrounded by multiple layers of conduits. Written on the negative is "49-275." (Image note: see related images PGE 49-273, PGE 49-274).

Photograph showing four men working on electrical utilities while wearing matching bowler hats. The two furthest individuals are holding an object while two others look on. The man closest to the front of the frame is holding a folding measuring tape. Surrounding the group are multiple conduits. Written on the negative is "49-274." (Image note: see related images PGE 49-273, PGE 49-275).

Photograph showing a large stream of water exiting a pipe and flowing towards the camera. In the background are several hills of dirt and rock, as well as a cement bridge. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. Two automobiles can be seen next to the building, one with "PGE" painted on the drivers side door. Behind the building is a cutaway hillside with dirt and rocks. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. A man can be seen standing to the right of the building, and two automobiles are parked in front. Water flows away from the building into the trees. Uphill is a dirt road and embankments. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. Just below the camera, a man faces towards the side and points at the water. Behind the building is a cutaway hillside with dirt and rocks. Written on the negative is "56-254."

A pipeline being built near Dodge Park in Clackamas County. Taken from the bottom of a hill and looking up, the pipe is being buried in a long trench, cutting into the hillside (negative 1 of 13).

Photograph showing the interior of a wrecked train, near Columbia Boulevard and Northeast 82nd Avenue in Portland. A man can be seen behind several pipes and knob (negative 3 of 15).

People standing in front of a truck with a crane, next to piles of large pipes. One man is balancing on a pipe and holding onto the truck crane. Several warehouse buildings can be seen in the background, one with a sign that reads “Gray & Co.” (negative 1 of 2).