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 scenic view of Mount Hood from the south side of Timothy Lake looking north. Trees can be seen in front of the camera, with newly excavated dirt in front. In the distance, low water can be seen in the lake, likely during water release.

Photograph showing Timothy Lake early in the water release process. A bridge of cut logs and wood planks extends to the far shore of the lake, with a rowboat moored to a section of the structure. Cut stumps on a hillside can be seen in the distance. Written on the negative is "56-251."

Photograph showing Timothy Lake before water release. A pool of water can be seen at the center of the frame, surrounded by bare dirt. Another pool can be seen towards the bottom of the image, separated by a raised dirt dam. Plumes of smoke can be seen in the distance, as well as a low rounded hill.

Photograph showing Timothy Lake early in the water release process. Lower parts of the lake are covered in water, with new dirt and cut stumps visible at higher levels. A utility pole and three bulldozer machines can be seen above the water along the shoreline. In the distance is a dense forest starting at the edge of the new lake.

Photograph showing Timothy Lake early in the water release process. Lower parts of the lake are covered in water, with new dirt and cut stumps visible at higher levels. A low forested mountain can be seen in the distance. Written on the negative is "56-251."

Photograph looking across water towards a cement and metal dam structure at Timothy Lake. Cut tree stumps and dirt can be seen to either side of the structure, as well as an area of rocks. In the distance is a low forested mountain and trees. Written on the negative is "56-251."

Photograph showing a cement dam structure at Timothy Lake before water release. A dirt road curves through the frame and crosses the dam structure. A dense forested area can be seen in the background along the edge of the excavated area.

Photograph showing a large stream of water exiting a pipe and flowing towards the camera. In the background are several hills of dirt and rock, as well as a cement bridge. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. Two automobiles can be seen next to the building, one with "PGE" painted on the drivers side door. Behind the building is a cutaway hillside with dirt and rocks. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. A man can be seen standing to the right of the building, and two automobiles are parked in front. Water flows away from the building into the trees. Uphill is a dirt road and embankments. Written on the negative is "56-254."

Photograph taken from a high angle and looking downward at a large stream of water being released from a pipe attached to a small building. Just below the camera, a man faces towards the side and points at the water. Behind the building is a cutaway hillside with dirt and rocks. Written on the negative is "56-254."

Photograph showing a temporary work camp built on the Oak Grove Fork of the Clackamas river during the Oak Grove construction project. Several white tents can be seen across the water, in front of a thick forest of pines. In the foreground, stumps and logs can be seen along the waters edge.

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 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 interior of the Cazadero power station at Station G, with the first three generating units. Large rounded windows can be seen on the right side of the high peaked room, and on the side of the generators is written “Allis Chalmers Company.”

Photograph showing the exterior of the Cazadero power station taken from across the Clackamas River. Four large pipes run uphill from the building. Previously burnt trees can be seen in the background.

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 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 looking across the water showing several large industrial buildings on the shore. On the left side is a pulp and paper company, and a white building with a large smokestack can be seen in the center of the frame. Along the shore are stacks of wood (possibly crates).

Photograph showing a wooden building and dock for a paper and pulp company. Shallow water can be seen throwing through a trench towards the left side of the frame.

Photograph showing a man working with a truck and hoisting machine on top of a wooden dam structure. The man stands next to the truck. Water is visible at the base of wooden stucture, which appears to be filled with rocks.

Photograph taken from a high angle showing several men working with a truck and hoisting machine next to flowing water of the Willamette River. On the left side of the image, two men stand on a dock platform while one holds a wooden pole.

Photograph showing a dam at Willamette Falls in Oregon City. In the center of the frame is Willamette Falls, with water cascading down. In the distance across the water, buildings can be seen along a hillside.

Photograph taken at Willamette Falls in Oregon city showing men working on a wooden dam structure. Industrial buildings and a smokestack can be seen just beyond the dam structure, and wooded hills are in the distance. A large white house is visible at the top of the hill on the left side of the frame.

Photograph showing groups of men working on a dam in Oregon. Two men are standing in the shallow water, while another two are in a rowboat to the right. Another four men stand on top of the wooden structure to the left next to a hoisting machine. In the background, multiple smokestacks can be seen coming from a large industrial building.

Photograph showing a dam at Willamette Falls in Oregon City. In the center of the frame is Willamette Falls, with water cascading down. In the distance across the water, buildings can be seen along a hillside.