Photograph showing a camp at Big Sandy Dam, made up of wooden buildings surrounded by trees. Electric lines and utility poles can be seen throughout the image. Written on the negative is “339 Big Sandy Camp.”

Photograph showing a camp at Big Sandy Dam, made up of wooden buildings surrounded by trees. The buildings are in a row on a gradual incline, and piles of wood and cut trees can be seen. Written on the negative is “340 Big Sandy Camp.”

Photograph looking into wooden penstock at Bull Run.

Photograph of the Big Sandy Dam site (likely the Marmot Dam), showing a wooden flume with suited individuals standing in the foreground. At the top of the hillside, a wooden building and platform can be seen. Written on the image is #34, B.S dam site, looking down stream, Oct 14, 1911.” (Image note: glass negative broken at lower right corner).

Photograph showing a temporary wooden dam at the Big Sandy Dam site (likely the Marmot Dam). Two workers stand on the wooden structure while looking upward at the camera. In the background, sandbags, woodpiles, and work tools can be seen. Written on the negative is “#33, Spillway in tempy dam at Big Sandy, Oct 21, ‘11.”

Photograph of river showing tunnel entrance and wooden structures along water edge. Wooded hillsides are seen at both sides of the river. Two men stand at the tunnel entrance.

Photograph showing construction at the Little Sandy Dam. A wooden structure is visible at both sides of the flowing river, with men standing on top of the structure. In the background is a wooded hillside and small wooden structure. Written on the negative is “Progress L.S. Dam, Freshet Oct 3, 2911.” (Image note: edge of glass is broken, obscuring some text).

Photograph showing construction at the Little Sandy Dam. A wooden structure is visible at both sides of the flowing river, with men standing around at ground level. In the background is a wooded hillside and small wooden structure.

Photograph taken on railroad tracks, looking at tracks and a seated man in a small rail car. Wooden and gravel debris can be seen throughout the image, and a small wooden building can be seen at the left side of the frame on a hillside. Written on the negative is “0-338” and “July-3-1912.”

Photograph of Little Sandy Dam, showing train tracks and dam structure. Small wooden building can be seen on the right, with trees in the background.

Photograph of Little Sandy Dam intake, showing wooden structure, river, and wooded hillside. A group of workers can be seen just beyond the intake structure.

Photograph looking downward at a wooden flume and railway track built on a hillside. The wooden structure continues into the distance, where more tree covered hillsides can be seen. In the bottom left corner of the frame, a man is looking at the camera and leaning against a cushioned seat, likely on a railway car. Written on the negative is “0-337, July-3-1912, Bull Run Flume.”

Photograph and structural plan of Bull Run flume on Little Sandy Dam. Bottom photograph shows flume with hillside and trees.

Photograph showing interior of wooden and steel structure of flume at Bull Run.

Photograph showing exterior of wooden and steel structure of flume at Bull Run.

Photograph of Bull Run flume showing a motorcar and man in a hat and suit.

Photograph looking downward at a wooden flume and railway track built on a hillside. The wooden structure continues into the distance, where more tree covered hillsides can be seen. Written on the negative is “0-336.”

Photograph of the exterior of Station B in Oregon City, with the flowing Willamette River in the foreground. Behind the brick building a hill with utility poles and three large tanks can be seen.

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 machinery wreckage at Station B in Oregon City. Several wheels and gear pieces can be seen throughout the image, broken off the main machinery mechanism. A man can be seen on the right side 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 machinery wreckage at Station B in Oregon City. Pieces of machinery can be seen throughout the image, disconnected and broken from the main mechanism.

Photograph showing machinery wreckage at Station B in Oregon City. Pieces of wood and stone lay on the floor, along with pieces of disconnected machinery. At the back of the frame, a man stands in a doorway while looking at the camera.

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 of the exterior west wall of Station B in Oregon City, with the Willamette River. Two men work on a wooden lock gate. Numerous utility poles are visible throughout the image.

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.