Photograph showing a damaged railroad train and railroad car on a rocky hillside, taken from a side angle. Wooden railroad ties can be seen in a pile in front of the train. Written on the side of the railroad train is “D.I.RY. Co.”

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 three men wearing hats on a rocky point at Oak Grove Butte. Mount Hood is visible in the distance on the right side of the frame, along with several other points and ridges. Written on the negative is “E301.09-O-24.” and “46.”

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 an incomplete wooden trestle bridge crossing a dirt ravine. A small creek is running downhill and under the bridge, while trees and mountains are visible in the distance. Two men can be seen standing on the left side of the bridge.

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 showing a wooden footbridge over a river (Oak Grove Fork of the Clackamas?). At the bottom of the frame, two men stand on the bridge, one of which is looking at the camera. Water can be seen flowing under the bridge. Written on the negative is “E301.09-O-26” and “25.”

Photograph showing a road cut through a hillside, with trees and mountains in the distance. Below the road, rocks and debris and can seen down the hill. Written on the negative is “E301.09-O-29” and “30.”

Photograph looking across the South Fork of the Clackamas River, where a man in a hat and vest is standing on the opposite shore. Above the man, a road cut can be seen, with dirt and rocks falling downshill. Written on the negative is “E301.09-O-31” and “38.”

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 taken from a high angle looking downward at the Oak Grove powerhouse site, showing the first cement being placed. Several men are gathered around the bottom section of a wooden chute extending towards a floor with metal framework. The Oak Grove Fork of the Clackamas River is visible in the background. (Image note: deterioration can be seen on the bottom left corner of the negative).

Photograph, likely taken from Oak Grove Butte looking southeast, showing mountains and ridges in the distance. Visible is North Pinhead Butte, South Pinhead Butte, and West Pinhead Butte. Written on the negative is “E301.09-O-88” and “8.”

Photograph showing three men on a steep hillside above the Clackamas River(?). One man sits towards the front of the group, while the other two behind are standing and looking towards the camera. At the base of the cliff is flowing water and logs. Written on the negative is “Lower Damsite at Intake, 5-4-20.”

Photograph showing six men working next to a large metal column at the Oak Grove powerhouse. Around the group are piles of cut lumber, tools, and metal and wood building framework. A recently logged hillside can be seen in the background. (Image note: some discoloration can be seen along the left side of the negative).

Photograph showing four tent cabins with chimneys in an open field area. Smoke is visible coming out of the chimneys. In the background is a forested hillside. Written on the negative is “E301.09-O-91.”

Photograph looking across the Clackamas River (?) at a dam site. Logs and flowing water are visible at the base of the rocky cliff. Written on the negative is “Upper Damsite at Intake, 5-4-20.”

Photograph showing a camp area with tent cabins and small wood buildings, taken from slightly uphill. Behind the structures is the Clackamas River and a wooded hillside. Written on the negative is “E301.09-O-110.”

Photograph showing a large generator component being moved with steel cables inside the Oak Grove powerhouse. In the background, a man can be seen looking upwards, while another is visible at the front of the frame looking towards the camera.

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 showing a party of men standing in a field of tall grass with horses. A forest is visible behind the group. Written on the negative is “Party at Three Links, 5-4-20.”

Photograph of interior of Station P at Oak Grove project showing two pieces of large round (generator?) equipment. The building is industrial with large windows on visible walls.

Photograph showing the boilers at Station E in northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue. Written at the top of each boiler is “Cahall Safety Boiler, The Aultman & Taylor MCH Y Co. Builders, Mansfield, Ohio.”

Photograph showing the boilers at Station E in northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue. Written at the top of each boiler is “Cahall Safety Boiler, The Aultman & Taylor MCH Y Co. Builders, Mansfield, Ohio.”

Photograph showing exterior damage one day after the 1908 wreck at the Cazadero Dam/Station G due to equipment malfunction. Broken windows and a damaged roofing are visible. Water flows out of pipes in the bottom of the building over the water.

Photograph showing interior damage one day after the 1908 wreck at the Cazadero Dam/Station G due to equipment malfunction. The floor is littered with debris, and a piece of a generator is visible on the left side of the frame. Windows and roofing materials show extensive damage.

Photograph taken from across the water, showing the employee cottages at Cazadero Dam/Station G. Building can be seen at the top of the hill above the river, with several small wooden structures in front of three long buildings. A railroad car is parked on the left side of the frame.

Photograph showing a brick and wood building with two smokestacks. In front of the building is a dirt road, and several wheels can be seen on either side of the building. In the background are other buildings, utility poles, and electric lines. Written on the negative is “S324” and “July 1911 Vancouver Sub. Sta.”

Photograph showing electrical equipment and pipes at Station L (now Oregon Museum of Science and Industry). Several gauges, wheels and levers can be seen throughout the image. In the background, metal sheeting can be seen on the far wall. Written on the image is “8-5-1921.” (Image note: see related images PGE 12-72, PGE 12-76, PGE 12-79).