Negative of a photographic postcard showing the generators at the Bonneville Dam. The generators are circular machines lined up in a large open room. Handwriting on negative reads, "Generators - Bonneville Dam. Christian 11-623."

People stand next to a burning generator during a basement fire at a Pacific Power & Light Company plant, in the Pittock Block of Portland. Fragments of light can be seen on the negative (negative 1 of 1).

Copy of Photograph, showing Station A at Willamette Falls in Oregon City. Multiple generators with large belts can be seen in a high ceiling room, and an individual can be seen standing in the background. Copy made April 16, 1915.

Copy of Photograph, showing Station A at Willamette Falls in Oregon City. Multiple generators with large belts can be seen in a high ceiling room with wooden beams. Copy made April 16, 1915.

Photograph taken at Station L (later the Oregon Museum of Science and Industry), looking downward at two generators. The far unit is being rewound with visible cable. Pieces of debris can be seen around the room, in addition to possible damage on the back wall. Large windows can be seen along the left wall, and metal plating lines the back wall.

Photograph of the engine room of Station L (now the Oregon Museum of Science and Industry) showing machinery. A person in a white shirt can be seen on the right side of the frame, and the front unit has “General Electric Company” written on it.

Photograph showing exterior and large machinery in Station L building. Several large generators can be seen on the main floor, with all peaked ceiling.

Photograph of the interior of the River Mill Dam (Station M) showing generator machinery. Written on the side of the front unit is “General Electric Company.” Three people can be seen in the photo, two of which are looking at the camera.

Photograph of large rotary converts at unidentified location. Several other large pieces of machinery can be seen in the background.

Photograph of rotary convert machinery in unidentified location.

Photograph showing a man in work wear standing next to a generator unit at the Little Sandy Dam. Other units can be seen in the background of the image, while a raised platform with a ladder is behind the front unit. Written on the negative is “No 2 unit, 1-29-12, Bull Run Ore. (47).

Photograph of a governor device at Bull Run. A large wheel is on the front of the machine.

Interior image of Station O room with governor and generator devices.

Photograph showing the interior of the powerhouse at the Little Sandy Dam, showing several generator units and a man standing near the center of the frame. Written on the side of the units if “Westinghouse.” Behind the generators, details of the industrial building can be seen. Written on the negative is “0352.”

Photograph taken from a high angle looking downward at the interior of the powerhouse at the Little Sandy Dam. Several generator units are visible, as well as a platform accessible via ladders. Several large windows can be seen on the far walls. On the side of the generator units is “Westinghouse.” Written on the negative is “0351.”

Photograph showing large machinery at Oak grove unit number 1 inside an industrial building. A man in dark hat and coat walks in front.

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 two men in hats and coveralls working with a generator component at the Oak Grove powerhouse. One man is facing towards the unit, while another looks towards the camera while facing towards the left. Wooden blocks can be seen under the rotor, which is on the ground.

Photograph of interior of Station P at Oak Grove project showing generator equipment from Pelton Motor Wheel Company. The building is industrial with large windows on visible walls.

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 of Oak Grove Dam showing second intake unit generator and five employees in work clothing standing inside the machinery. The building in industrial, with large windows on all visible walls.

Photograph showing two men standing next to a 500V vertical railway generator at Station B in Oregon City. Both men are looking at the camera, and a stairway ladder between them leads to the top of the generator.

Photograph showing a man standing next to a 500V vertical railway generator at Station B in Oregon City. The man is standing slightly to the right of the machine and is looking at the camera.

Photograph showing the interior of Station B in Oregon City. On the main floor are several large machines (generators?) with other electrical infrastructure visible near the ceiling. A small desk and chair can be seen near the center of the frame.

Photograph showing the interior of Station B in Oregon City. On the main floor are several large machines (generators?) with other electrical infrastructure visible near the ceiling. An individual stands at a small desk near the middle of the frame, and is looking at the camera.

Photograph showing the interior of Station B in Oregon City. On the main floor are several large machines (generators?) with other electrical infrastructure visible near the ceiling. A small desk and chair can be seen.

Photograph showing the armature of a TY-20 generator at Station B in Oregon City. Several pieces sit on the floor, leaning against the unit, and large wooden blocks can be seen at the base.