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 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 showing interior damage one day after the 1908 wreck at the Cazadero Dam/Station G due to equipment malfunction. A man stands with debris while looking at the camera, and windows and roofing materials show extensive damage.

Photograph of generator unit #3 at Cazadero Dam/Station G, taken two months after the 1908 accident due to equipment malfunction. On the front of the unit “General Electric Company” is written. A man stands on the left side of the frame with one hand on a wheel.

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.

Photograph showing the exterior to power plant buildings at the Little Sandy Dam, seen in a wooded setting. Two large buildings can be seen on a hillside, each with large windows. The building near the left side of the frame also includes transformer infrastructure on its roof. Written on the negative is “0356.”

Photograph showing construction at the Big Sandy Dam (likely the Marmot Dam). Workers can be seen on the wooden structure, with flowing water at the right side of the image. In the background are several small wooden structures. Written on the image is “B.S. 32.”

Photograph showing the Big Sandy Dam (likely the Marmot Dam) spillway with flowing water, taken looking upriver. A wooden platform can be seen crossing the dam above the water. Written on the negative is “B.S. 47.”

Photograph showing construction of the tunnel at the Big Sandy Dam (likely the Marmot Dam). A man stands next to a machine next to the tunnel entrance, which is emitting a large plume of steam. Wood and gravel is visible throughout the image. Written on the negative is “B.S. 48.”

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 the incomplete interior of the powerhouse building at the Little Sandy Dam. Near the center of the frame, a man stands with folded arms looking towards the camera. Wooden scaffolding is visible throughout the image. In the background, a hillside of dirt and debris can be seen outside the building. Written on the negative is “E301-0-3405.” (Image note: discoloration visible at the right side of the frame).

Photograph showing construction at the Big Sandy Dam (likely the Marmot Dam). Several men can be seen standing on the wooden structure at the center of the frame. In the background, a wooden bridge crosses the river, surrounded by trees. Written on the image is B.S-19.”

Photograph showing the spillway of the Big Sandy Dam (likely the Marmot Dam) while under construction. Works can be seen standing at the top of the structure, while several wooden buildings can be seen in the background. Written on the image is “B.S. 26.”

Photograph showing construction at the Big Sandy Dam (likely the Marmot Dam). Multiple men can be seen standing on the wooden structure at the base of a loose hillside, while a wooden building and platform can be seen at the top of the frame. Written on the image is B.S-7.”

Photograph showing a man standing with construction debris during canal excavation for the Big Sandy Dam project (likely Marmot Dam). Large rock and pieces of wood can be seen throughout the image. In the background, other men can be seen next to a wooden wall. Written on the negative is “B.S.1.”

Photograph showing construction at the Big Sandy Dam (likely the Marmot Dam). In the foreground, two men stand on top of the wooden spillway structure, while other works can be seen in the background towards the hillside. Gravel and more wood can be seen towards the top of the hill. Written on the image is B.S-37.”

Photograph showing a man kneeling at the top of the tunnel entrance at the Big Sandy Dam (likely the Marmot Dam). He is holding a labeled measuring stick that extends into the water below. (Image note: some discoloration at edges of negative).

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 Big Sandy Dam (likely the Marmot Dam) spillway with flowing water, taken looking upriver. A cement divider can be seen at the top of the spillway, in front of a small wooden structure and platform. Written on the negative is “B.S. 52.” (Image note: discoloration visible at right side of image).

Photograph showing construction at the Big Sandy Dam (likely the Marmot Dam). Workers can be seen inside of a long wooden structure (flume?) while one can be seen at the top. On the right side of the frame is a loose hillside. Written on the image is B.S-35.”

Photograph showing the interior of Station G at the Cazadero Dam showing the generator units and building structure. Several large windows an be seen on the left side of the frame, and a man can be seen in the background near the top.

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 from a side angle of the River Mill Dam and powerhouse, showing exterior of building and view of dam structure. Water from the Clackamas River can be seen moving over the dam, and trees and transmission lines are visible in the distance.

Photograph of the River Mill Dam, showing recently cut trees and possibly dam structure under construction. Water can be seen at the front of the frame.

Photograph from the interior of Station M at the River Mill Dam showing governor #3 during a test. On the device is written “The Lombard Governor Co.”

Photograph of the River Mill Dam powerhouse taken from a high angle, looking downwards. In the background, the dam structure and transmission lines can be seen.

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.