Photograph looking down a large pipe, showing the outline of a person.

Photograph showing men and horses standing on a trail cutting through a rocky slope. They are facing away from the camera and mounted. Written on the negative is “E301.09-O-27” and “43.” Image note: “Sherrard, Cravey, Caldwell” written on negative sleeve).

Photograph showing the South Fork of the Clackamas river, looking towards a large rocky cliff-face. A man can be seen walking on a log in the river, while three others sit on a rock extending into the water. Written on the negative is “E301.09-O-36.”

Photograph showing a group of men excavating a hillside at the Oak Grove powerhouse site. Next to the group are two large metal buckets, which are attached to a hook and pulley.

Photograph taken from a high angle looking downward at floor construction for the Oak Grove powerhouse. Wood, pipes, and metal framework can be seen in the floor, while workers can be seen throughout the image. A man is standing on a section of floor with a wooden circle, next to a tripod total station (Image note: deterioration can be seen on the negative along the bottom edge).

Photograph showing a hillside with a man in the foreground, with a steam shovel visible further along a cut dirt road. The man is turned sideways and is bending over a long piece of pipe. On the right side of the frame, the Clackamas River is visible, along with rock and mud debris. Written on the negative is “E301.09-O-54” and “11.”

Photograph showing three men wearing hats on a rocky point at Oak Grove Butte. Mount Hood is visible in the distance on the right side of the frame, along with several other points and ridges. Written on the negative is “E301.09-O-24.” and “46.”

Photograph taken from the front, looking at a pipe traveler moving along a track in a excavated dirt area. Two men ride at the top of the unit, while others can be seen below on the ground. A large metal pipe is being held in the unit, which appears to be attached to a pulley cable system.

Photograph taken from a side angle, showing an incomplete wooden trestle bridge crossing a dirt ravine. A small creek is running downhill and under the bridge, while trees and mountains are visible in the distance. Two men can be seen standing on the left side of the bridge.

Photograph taken from a side angle showing a pipe traveler machine being tested on a short length of pipe, in a recently cleared dirt area. Two individuals can be seen standing on top of the device.

Photograph showing the top surface of a wooden trestle bridge and a dirt road, with a wooden flume and dam structure visible in the distance (Cazadero Dam). In the background, forested hillsides can be seen above the Clackamas River. Written on the negative is “E301.09-O-23” and “32.”

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 taken from a side angle showing a roofed pipe traveler device, in a dirt ditch and area recently cleared of trees. One man can be seen in the pipe traveler, while another stands at ground level.

Photograph showing a group of people standing next to a small wooden building at Austin Hot Springs. The Clackamas River can be seen next to the building. Written on the negative is “E301.09-O-25” and “45.” (People included: Crane, Caldwell, Sherrard).

Photograph showing a railroad train towing several large pieces of pipe on attached railroad cars. The train is traveling through an open area surrounded by dense forest, and four men can be seen in the frame in between the camera and train.

Photograph showing a camp area next to a river, with several wooden and canvas buildings visible throughout the frame. A small wooden bridge crosses the river, on which two men stand facing the camera. Beyond the grouping of canvas tent cabins, smoke can be seen, likely from brush burning.

Photograph showing a group of people standing on a road while looking towards the camera (including Franklin T. Griffith, President). The road and hillside is covered in rocks, and in the background is a large pile of cut trees.

Photograph showing an excavated dirt area (Frog Lake) with tree stumps, cut timber, and a railroad track. Trees can be seen at the edge of the dirt, with forested mountains in the distance.

Photograph taken from across the Clackamas River showing two small wooden “clockhouse” buildings. Snow can be seen throughout the image, one the ground and trees. Written on the negative is “new and old clockhouses at Big Bottom 12/15/20.” (Image note: see related image PGE 16-35)

Photograph showing three sawmill tractors at a temporary construction camp area, with a wooden water tower. A man is standing on top of the tower, and several other men can be seen in front of the tractors. Barrels and piles of wood are visible throughout the frame.

Photograph showing several large lengths of conduit pipe on the flat bed of a train car. A man in a hat stands inside the last piece of pipe, facing towards the camera. In the background is a dense forest, and pieces of wood and debris can be seen on the ground throughout the image.

Photograph showing a dirt road on a hillside with an active steam shovel. In the background are two vehicles on the road, with men visible at the far left side of the frame. Next to the steam shovel is a pile of dirt and rocks, and written on the machine is “Marion Shovel – Model 21.” Written on the negative is “E301.09-O-20.”

Photograph taken from a slight high angle looking downward at a cluster of small wooden buildings on a snow-covered hillside. At the base of the hill, a man faces forward towards the camera, while another stands next to the log cabin further uphill. Written on the negative is “cabin and weather observing station at intake, 12/12/20.”

Photograph taken from the ground and looking upward at a high climber with a cut tree top. Other trees can be seen throughout the frame. Written on the negative is “E301.09-O-450.”

Photograph showing a man standing next to a wooden “clockhouse” building with snow. He is wearing winter clothing, a hat, and is holding a rifle. Downhill from the building is the Clackamas river. Written on the negative is “Clockhouse at Big Bottom 12/15/20.” (Image note: see related image PGE 16-37.”

Photograph showing a damaged railroad train and railroad car on a rocky hillside, taken from a side angle. Wooden railroad ties can be seen in a pile in front of the train. Written on the side of the railroad train is “D.I.RY. Co.”

Photograph looking up the Clackamas River, taken during a flood. On the right side, a cut road can be seen crossing the hillside, with several small flowing waterfalls. Written on the negative is “E301.09-O-46” and “19.”

Photograph looking westward at recently logged open area. Standing water with floating logs can be seen in the cleared area, along with several horse teams towards the front of the frame.