Photograph showing the spillway on an unidentified dam, looking upriver. Trees can be seen along the water. On the negative is written "49-115." (Image note: see related image PGE 49-116).

Photograph showing men working along an unidentified river (possibly the Columbia River). Three men can be seen along the top of a wooden wall, while two others stand on a wooden board at water level. In the background is a cliff, and a transmission tower can be seen in the distance. Written on the side of the negative is "49-154." (image note: see related images PGE 49-161, PGE 49-170, PGE 49-172, PGE 49-174, PGE 49-175, PGE 49-178, PGE 49-184, PGE 49-185).

Photograph showing flowing waterfalls on an unidentified river (possibly the Columbia river). Behind the waterfalls, possible dam infrastructure can be seen. In the background, more rocky cliffs can be seen, as well as a road and electrical lines. Written on the side of the negative is "49-170." (Image note: see related images PGE 49-154, PGE 49-161, PGE 49-172, PGE 49-174, PGE 49-175, PGE 49-178, PGE 49-184, PGE 49-185).

Photograph showing men working underneath a dam structure using a hose and pump. Layers of rock and silt can be seen in front of the men, with a large piece of basalt at the bottom of the frame. Written on the negative is "49-184." (Image note: see likely related images PGE 49-154, PGE 49-161, PGE 49-170, PGE 49-172, PGE 49-174, PGE 49-175, PGE 49-178, PGE 49-185).

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 showing the camp at the River Mill Dam site, taken from the top of the railroad bridge. Snow blankets the ground throughout the image, and numerous wooden buildings an be seen. Written on the negative is “82M.”

Photograph of Bull Run reservoir showing dike and temporary falsework for construction of intake. A man in a long coat and hat stands on the dike looking forward. In the background, trees and buildings are visible.

Photograph taken from a high angle showing the penstocks at the Little Sandy Dam. In the distance, numerous utility poles and electric lines are visible. Construction debris litters the ground throughout the image. Written on the negative is “0346.”

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 several temporary tent structures in a large field. Is the distance, another structure can be seen, in addition to trees and hills. (Image note: discoloration of the negative is visible at the center of the frame, in addition to a small damaged area also near the center).

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 an excavated dirt canal, with visible water at the bottom level. In the distance, works can be seen along the sides of the canal, and a tunnel entrance is visible in the background. Written on the negative is “B.S-22.”

Photograph showing two men with a horse towing a metal cart on a railroad track. The horse is attached to the cart via a harness, with the reins being held by one of the individuals. In the background are trees and a hillside.

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 a wooden flume bridge crossing the Little Sandy River near the Little Sandy Dam. Five men in work wear stand on pieces of wood next to the flume while looking at the camera. Water can be seen under the bridge in the background. Written on the negative is “E301-03396.”

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

Photograph looking upstream on the Clackamas River, past the new powerhouse site, taken from a point on right bank at bend. A steep river bank and trees are visible throughout the image. Written on the negative is “E301.09-O-148” and “R22.”

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 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 construction of a wooden platform at a temporary work camp in a wooded setting. Tent cabins can be seen in the background, and men can be seen throughout the frame. Written on the negative is “E301.09-O-364.”

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 Oak Grove Fork of the Clackamas River can be seen, and snow is on the ground throughout the image. Written on the negative is “E301.09-O-369.”

Photograph showing three men on a steep hillside above the Clackamas River. One man sits towards the front of the group, while the other two behind are standing and looking towards the camera. At the base of the cliff is flowing water and logs. Written on the negative is “Lower Damsite at Intake, 5-4-20.”

Photograph looking across the Clackamas River at a potential dam site. Logs and flowing water are visible at the base of the rocky cliff. Written on the negative is “Upper Damsite at Intake, 5-4-20.”

Photograph showing a party of men standing in a field of tall grass with horses. A forest is visible behind the group. Written on the negative is “Party at Three Links, 5-4-20.”

Photograph of interior of Station P at Oak Grove project showing two pieces of large round (generator?) equipment. The building is industrial with large windows on visible walls.

Photograph showing the main turbine unit at Cazadero Dam/Station G. On a small sign at the front of the unit is written “847.” (image note: glass plate is broken on two edges).