Photograph showing construction at Cazadero Dam. The Clackamas River can be seen flowing on the right side. Ice formations are on the hillside to the left, and snow and frost can be seen on the wooden dam structure.

Photograph showing the Cazadero Dam during a flood, before the placement of a new apron. Fast flowing water spills over the dam.

Photograph of the Cazadero Dam taken in front of the spillway. Water flows over the ledge into a pool at the base, and another stream of water can be seen spilling down on the right side of the frame. The stacked wooden dam structure is visible to the left of the main spillway.

Photograph showing in-progress re-decking of the spillway at the Cazadero Dam/Station G. Men are visible at the top and bottom of the structure, and water and wood debris can be seen below the spillway.

Photograph showing completed re-decking on the spillway at Cazadero Dam/Station G. Wood debris can be seen in the water below the spillway, and leftover ropes, ladders and tools are visible on the lower walkway.

Photograph showing workers during re-decking of the Cazadero Dam. Four men stand at the top of the structure, while one sits on a ladder looking upward. Another part of the wooden dam is visible in the background.

Photograph showing in-progress re-decking of the spillway at the Cazadero Dam/Station G. Men are visible at the top and bottom of the structure, and water and wood debris can be seen below the spillway.

Photograph showing the fishway Cazadero Dam/Station G. A man sits in a boat looking at the camera, with the wooden dam structure is visible behind. Part of the flume can be seen along the right side of the frame.

Photograph taken during a flood at Cazadero Dam/Station G. A large amount of water flows down the spillway on the left side of the image, and the flume is visible across the water.

Photograph showing construction of Cazadero Dam. Several workers can be seen in the distance at the top of a stacked wooden dam structure, with a dirt hillside above. The Clackamas River is visible at the bottom of the dam, and trees (possibly burnt) can be seen at the top of the hill.

Photograph showing the Cazadero Dam flume running into the distance. Trees (possible burned) can be seen on both sides of the (excavated?) canal.

Photograph of the Cazadero flume at generating Station G, showing air compressor and pipelines weld, in placing concrete for new bents. Several cars can be seen on a railroad track, and the flume can be seen running along the right side of the frame.

Photograph taken from above Cazadero Dam/Station G, looking downriver towards the spillway and wooden dam structure. Behind, a dirt hillside and trees can be seen.

Photograph taken from a side angle, showing the flume at the Cazadero Dam/Station G. Below the wooden flume is a dirt hillside with rocks, and a long wooden building can be seen in the background on the right side of the frame.

Photograph looking towards flume and railway tracks at Cazadero Dam/ Station G. A man stands on the railway tracks in the distance, and a dirt hillside drops down between the tracks and the flume.

Photograph showing the flume at Cazadero Dam/Station G during a flood. Rapidly moving water is visible in the Clackamas River below the flume, and a wooden building can be seen on a hillside above.

Photograph looking upstream, below proposed upper dam site at Cazadero Dam/Station G. A railroad track and flume can be seen running into the distance around a hillside, and two possible construction vehicles are visible. The river can be seen on the left side of the frame.

Photograph of the Cazadero flume at generating Station G, showing a compressed air concrete mixer on a train car. Two men stand at either side of the mixer while looking at the camera.

Photograph showing the Faraday flume for generating Station G. Below the flume structure, the Clackamas River can be seen, with several small waterfalls flowing off the hillside above.

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 the spillway on an unidentified dam, taken from a side angle and looking across the river. Trees can be seen along the water. On the negative is written "49-116." (Image note: see related image PGE 49-115).

Photograph showing a short wooden dam structure on an unidentified river (possibly the Columbia River). Several men can be seen on top of the structure, on top of which water is being diverted from a pipe. Rock cliffs, wooded hills, and buildings can be seen in this distance. Written on the negative is "49-178." (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 49-184, PGE 49-185).

Photograph showing a short wooden dam structure on an unidentified river (possibly the Columbia River?). Below the structure is an area of natural rock formations and logs, and wooded hills can be seen above the shore in the distance. Written on the negative is "49-172." (Image note: see related images PGE 49-154, PGE 49-161, 49-170, 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 a man in a diving helmet, partially submerged next to another man who is standing on a wooden board. The diving helmet is metal and has several openings. Written on the negative is "49-205. "(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 49-184).

Photograph showing a man facing towards a large electrical generator at the Oak Grove Dam. On his right is a stairway leading to the upper level of the generator, which is in a large industrial powerhouse building. Written on the negative is "49-291."

Photograph, looking towards the powerhouse structure at the Oak Grove Dam. Large pipes can be seen behind the building, extending up a large hill towards a tank at the top. To the left of the stone building, a retaining wall and metal frame structure can be seen. Written on the negative is "49-289."

Photograph showing a group of seated people outside a stone building, with a man standing and facing the group next to a stairway. A sign on the building reads "River Mill Hydroelectric Project," and a river and trees can be seen in the background. Written on the negative is "51-864."