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 of interior of Station P at Oak Grove project showing generator equipment from Pelton Motor Wheel Company. The building is industrial with large windows on visible walls.

Photograph of Oak Grove Dam showing second intake unit generator and five employees in work clothing. Four of the individuals are standing below ground inside the machinery, while one stands further back at ground level. The building in industrial, with large windows on all visible walls. In the background is another generator unit.

Photograph, taken from a high angle, showing three men looking at the camera in a large wheel base. Two of the men are standing at the center, and one is sitting casually at the side. The standing men appear to be using a surveying tool on a tripod.

Photograph of Oak Grove Dam showing second intake unit generator and five employees in work clothing standing inside the machinery. The building in industrial, with large windows on all visible walls.

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 interior of Station G at the Cazadero Dam showing the generator units and building structure. Several large windows an be seen on the left side of the frame, and a man can be seen in the background near the top.

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 showing the interior of the powerhouse at the Oak Grove Dam on the Clackamas River. Two large electrical units can be seen, with upper walkways. The building is a large industrial space with tall windows. Written on the negative is "49-293."