Photograph showing a group of officials and laborers standing on a hillside next to a wooden cart and train tracks. Two individuals in work clothing standing behind the main group. A loose dirt hillside and trees can be seen in the background. Closer to the photographer, lots and water can be seen, as well the the edge of a saw.

Photograph looking towards a landslide near camp #4.5 on the Clackamas River (Oak Grove fork?). River rocks and wooden logs can be seen in the foreground. On the right side of the frame, a fallen dirt hillside can be seen. Written on the negative is “E301.09-O-14.6” and “R33.”

Photograph showing slowing water and logs on the Clackamas River (Oak Grove Fork?), upstream from the potential site for the lower dam. Written on the negative is “Upstream from Lower Damsite at Intake, 5-4-20.” (Image note: numerous scratches are visible on the negative).

Photograph showing men standing on a wooden platform looking at the camera. On top of the platform is a makeshift ladder leading to a pulley and rope. Written on the negative is “E301.09-O-239” and “R-8.”

Photograph showing small wooden building with piles of cut lumber in front of a steep logged hillside. On the right side of the frame, the Clackamas River, or Oak Grove Fork can be seen, and snow is on the ground throughout the image. Written on the negative is “E301.09-O-369.”

Photograph showing a wooden dam being built across a flowing river (Oak grove Fork of the Clackamas?). Several individuals can be seen throughout the frame, and piles of wood are visible at either side of the dam structure. Across the river is a recently logged area with fallen timber.

Photograph showing the concrete dam structure at Oak Grove during construction. Around the dam are several wooden structures, including a possible flume. On the left side, a wooden ladder leans again the dam.

Photograph showing a cement dam on the Oak Grove Fork of the Clackamas River, with a noticeable water pool in front of the dam structure. A man seated on a platform can be seen over the water on the right side of the image, with submerged pieces of wood to the left. Negative sleeve notes “less than one hour after filling.” (Image note: see related image PGE 16-903).

Photograph showing a cement dam on the Oak Grove Fork of the Clackamas river, captured immediately after closing for the first time. Water can be seen at the base of the dam to the front, with four men visible to the right. Uphill from the dam structure, other wooden structures can be seen. (Image note: see related image PGE 16-927).