Photograph showing the exterior of the River Mill Dam powerhouse, likely shortly after construction. Loose hillsides can be seen to the left and right of the building, with transmission lines throughout (image note: corner of glass negative is broken and missing).

Photograph taken at Station L (now the Oregon Museum of Science and Industry) of hog fuel being unloaded via a derrick from a barge on the Willamette River. The Hawthorne bridge can be seen in the distance.

Photograph taken from a high angle of the hog fuel pile at Station L (now the Oregon Museum of Science and Industry), looking south. The Willamette River can be seen on the right side of the frame, and two unidentified churches can be seen in the distance.

Photograph taken of the hog fuel pile at Station L (now the Oregon Museum of Science and Industry). An unhitched wagon sits at the base of the hill to the right, and a “no trespassing” sign is visible near the center of the frame. In the distance, a person can be seen standing at the top of a pile.

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 showing brickwork of furnace of boiler #6. Bricks are visible on all walls, and an arched opening in the middle of the frame is built of bricks.

Photograph showing a man wearing overalls facing a large wooden box of hog fuel. The man is using a tool to tilt the fuel box, which is suspended on a rope. To the left of the man is the Willamatte River and the Hawthorne Bridge.

Photograph taken at Station L (now the Oregon Museum of Science and Industry) of hog fuel being unloaded via a derrick from a barge on the Willamette River. The Hawthorne bridge can be seen in the distance, as well as other boats. One person stands on the barge watching a crate being lifted onto the dock.

Photograph showing the boiler room at Station L (now the Oregon Museum of Science and Industry). A long row of boiler doors can be seen, and a man in a hat and overalls stands in front of one while looking at the camera. Large metal beams can be seen at the top of the boiler stuctures.

Photograph showing the exterior of Station L (now the Oregon Museum of Science and Industry) with several buildings visible. Railroad tracks pass through the front of the frame, and water from the Willamette River can be seen in front of the main stone building.

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 taken at Station L (later the Oregon Museum of Science and Industry) taken from a high angle showing wooden pilings over water in the foreground, with piles of cut logs in the distance. Several people can be seen on a wooden structure at the left side of the frame, as well as a group standing on a raised platform cutting logs towards the right side. In the distance, a building on a raised dock structure with a large “Portland Railway, Light & Power Co.” sign can be seen. Written on the glass is “L276.”

Photograph showing wooden pilings under set in water at Station L (now the location of the Oregon Museum of Science and Industry).. Behind the orderly pilings is a raised wooden on which rests several pieces of large equipment. Two men in long jackets can be seen near the center of the frame, in addition to several workers in the background of the image. Written on the glass is “L274.”

Photograph showing the exterior of Station H, including brick and wooden buildings and five small smokestacks.

Photograph showing the interior of the Cazadero power station at Station G, with the first three generating units. Large rounded windows can be seen on the right side of the high peaked room, and on the side of the generators is written “Allis Chalmers Company.”

Photograph showing the head gate controllers at the Cazadero power station (Station G). Each controller is painted with a number.

Photograph showing the exterior of the Cazadero power station taken from across the Clackamas River. Four large pipes run uphill from the building. Previously burnt trees can be seen in the background.

Photograph of the Cazadero flume at generating Station G, showing air compressor and pipelines weld, in placing concrete for new bents. Several cars can be seen on a railroad track, and the flume can be seen running along the right side of the frame.

Photograph of the Cazadero flume at generating Station G, showing a compressed air concrete mixer on a train car. Two men stand at either side of the mixer while looking at the camera.

Photograph showing turbine construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Several large machines can be seen in the room, with a hole visible in the brick wall behind.

Photograph showing construction of stack at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). One worker stands on a ledge of the stack, while two others look at the camera.

Photograph taken from a distance, showing the completed smokestack of Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). The large stack can be seen in the middle of the frame, next to a smaller wooden building. Several other stacks and utility poles can be seen in the distance.

Photograph showing an oil tank during construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Near the top of the frame, several men look at the camera.

Photograph showing interior construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Several men look at the camera on the left and right sides of the frame. In the center, a piece of machinery is hand painted with “Portland General Electric, Portland, Or.” Another man stands on top of the unit.

Photograph showing the interior of Station E during construction (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Two men can be seen looking at the camera, with one standing in front of the unit, and another above at the top of a ladder. Large windows are visible on the other side of the large industrial machine.

Photograph taken from a high angle showing interior construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Two men look at the camera, and two large round prices of machinery can be seen on the right. On the front of the round pieces is a hand painted “Portland General Electric C., Portland OR.” In the foreground, a rectangular package says “From General Electric Co.”

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 the installation of the boilers at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Two men stand at the top of wooden scaffolding while looking at the camera. A pile of bricks can be seen at the base of the wall, next to wooden debris and a wheelbarrow.