Photographs showing six works in tunnel at Oak Grove. One man looks at the camera, while another uses a pick ax to examine a white vein in the rock wall. The four men at the top of the frame stand on temporary scaffolding.

Photograph looking down an underground tunnel. Lights and a large pipe run along the right wall into the distance. A train track is visible on the floor, as well as various pieces of debris against the left wall.

Photograph showing large machinery at Oak grove unit number 1 inside an industrial building. A man in dark hat and coat walks in front.

Photograph showing an area of tent cabins in a forested area at camp #6. A horse and cart can be seen at the right side of the frame. Written on the negative is “E301.09-O-154” and “R31.”

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 a building and enclosed field at the Jehu Davis Ranch, taken through trees. A forested hillside can be seen in the background above the building. (Image note: numerous scratches are visible on the negative).

Photograph showing a temporary camp at the Roaring River ranger station, looking northwest. Several tent cabins can be seen throughout the middle of the frame, as well as two small log wooden buildings. Forested hillsides can be seen in the background. Written on the negative is “R32.” (Image note: discoloration visible at near top right corner).

Photograph showing a caterpillar machine and men standing in a clearing of logs and trees. The men on the right side look towards the caterpillar, which is being driven by a man on a bench seat, who is bent to his left. Written on the negative is “E301.09-O-172.” (Image note: discoloration is visible on right and bottom edges of negative).

Photograph showing a group of forward facing people, taken next to an automobile. The automobile is facing to the side, and has open air seating. Tent cabins can be seen in the background. Written on the negative is “E301.09-O-235” and “R-12.” (Image note: significant discoloration can be seen along the right side of the negative).

Photograph looking uphill towards a log cabin. A man stands on the front porch of the structure, while another is standing downhill with a horse while looking towards the camera. Logs and stumps can be seen downhill front the cabin.

Photograph showing a log cabin with a group of people standing around the porch. To the left of the building of a parked automobile next to a smaller wooden building. Forest can be seen in the background. Written on the negative is “E301.09-O-255.”

Photograph looking up towards a rounded mountain, with trees and the foreground. Written on the negative is “Lowe meadow point elev. 5113, 12/14/20.”

Photograph showing horses, Russell 15-30 steam tractors, and wooden planks in a dirt clearing. In the background is a wooded hillside. Written on the negative “E301.09-O-248.”

Photograph showing a forward facing man in a hat and overalls standing in front of a wooden cabin. In the background is a wooded hillside. Written on the negative is “E301.09-O-251.”

Photograph from a high angle showing a building on pillars in the snow (saw mill?). A men can be seen standing at the edge of a wooden deck looking away from the camera. Written on the negative is “E301.09-O-294.”

Photograph taken from a side angle showing a wooden trestle bridge with an open gap before the installation of a steel span. Rocks and dirt can be seen in the foreground, and a hillside with bare trees behind the bridge. Written on the negative is “E301.09-O-296.”

Photograph showing two men standing next to an automobile, which is parked on a dirt hillside. To the right of the automobile is a stone railing extending down the hillside.

Photograph showing a cluster of tent cabins in an open area of snow. Each cabin has a chimney, many with smoke. Snow laden trees can be seen in the background.

Photograph taken from a side angle showing a raised wooden building in a clearing at “straights flat terminal.” Piles of cut wooden plants can be seen next to the building. Written on the negative is “E301.09-O-298.”

Photograph showing the northern side of the wooden North Fork trestle bridge, before completion. Behind the bridge is a loose dirt hillside with trees at the top.

Photograph taken from above showing a snow laden landscape. On the right side of the frame a cluster of buildings can be seen (headquarters camp), and on the left is the Clackamas River.

Photograph showing two Russel 15-30 steam tractors being used to saw lumber. An awning is stretched over the area, and a wooden building can be seen in the background.

Photograph taken from a slightly high angle showing wooden structures and dirt roads in a camp area. Trees and a wooded hillside can be seen in the background.

Photograph showing a canvas and wooden cook house building in the snow at camp #9. The building is on a raised wooden platform. In the background is a wooded hillside, with some logged trees visible. Written on the negative is “E301.09-O-329.”

Photograph showing a men at a sawmill in a forested area at construction camp. A tractor can be seen in the background, likely being used to run a motorized saw. Other saw blades and belt drives can be seen in the image.

Photograph showing a temporary camp at Davis Ranch, with tent cabins in the snow. Each cabin includes a chimney, many of which show smoke. A worn path can be seen extending from the camera towards the camp area. In the background is a wooded hillside.

Photograph showing temporary at construction camp in the Oak Grove area. Several tent cabins and wooden buildings can be seen in the distance in front of wooded hills. At the right side of the image, several men and a tractor are on a short wooden bridge. Written on the negative is “E301.09-O-333.”

Photograph showing a wooden sawmill building at Davis Ranch taken in the snow. Logs can be seen on the ground in front of the building. Smoke or steam is coming out of several pipes on the building, and men can be seen standing in and in front of the structure. Written on the negative is “E301.09-O-336.”