Photograph of a depot and substation at Beaver Creek for the Willamette Valley Southern Railway Company (W.V.S.RY). A sign on the building says “Beaver Creek,” and a train with logs can be seen on the a railroad track just beyond the building. People stand next to the station looking at the camera. Two other wooden structures can be seen to the left of the building.

Photograph of workers cutting through a dirt hill for the Mt. Hood Railway. The two men wearing suspenders and hats stand facing the hill, with tools laying on the ground.

Photograph showing men in work wear standing on top of a wooden structure with rounded forms. Written on the negative is “intake 2-5-12.”

Photograph taken from a side angle showing the incomplete powerhouse at the Little Sandy Dam. The building is surrounded by wooden scaffolding, with wood debris littering the ground. Works can be seen throughout the image. Written on the negative is “#23 Oct, 10. 1911.”

Photograph showing the incomplete interior of the powerhouse building at the Little Sandy Dam. Near the center of the frame, a man stands with folded arms looking towards the camera. Wooden scaffolding is visible throughout the image. In the background, a hillside of dirt and debris can be seen outside the building. Written on the negative is “E301-0-3405.” (Image note: discoloration visible at the right side of the frame).

Interior image of Station O room with governor and generator devices.

Photograph showing a temporary wooden dam at the Big Sandy Dam site (likely the Marmot Dam). Two workers stand on the wooden structure while looking upward at the camera. In the background, sandbags, woodpiles, and work tools can be seen. Written on the negative is “#33, Spillway in tempy dam at Big Sandy, Oct 21, ‘11.”

Photograph showing construction at the Little Sandy Dam. A wooden structure is visible at both sides of the flowing river, with men standing on top of the structure. In the background is a wooded hillside and small wooden structure. Written on the negative is “Progress L.S. Dam, Freshet Oct 3, 2911.” (Image note: edge of glass is broken, obscuring some text).

Photograph showing construction at the Little Sandy Dam. A wooden structure is visible at both sides of the flowing river, with men standing around at ground level. In the background is a wooded hillside and small wooden structure.

Photograph taken on railroad tracks, looking at tracks and a seated man in a small rail car. Wooden and gravel debris can be seen throughout the image, and a small wooden building can be seen at the left side of the frame on a hillside. Written on the negative is “0-338” and “July-3-1912.”

Photograph of Little Sandy Dam, showing train tracks and dam structure. Small wooden building can be seen on the right, with trees in the background.

Photograph of Little Sandy Dam intake, showing wooden structure, river, and wooded hillside. A group of workers can be seen just beyond the intake structure.

Photograph and structural plan of Bull Run flume on Little Sandy Dam. Bottom photograph shows flume with hillside and trees.

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

Photograph showing an oil tank during construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Near the top of the frame, several men look at the camera.

Photograph showing four men posing with boilers at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Two men stand at the front of the boilers while two others peak out near the top.

Photograph showing generator units under construction at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Behind the units, brick walls can be seen, with a ladder installed.

Photograph showing engines at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). A man in overalls stands on a platform on the left side of the frame.

Photograph showing an engine exciter at Station E (northwest Portland, near the intersection of NW 21st Avenue and NW Sherlock Avenue). Two men in overalls stand to the left of the machine, looking at the camera. The man on the right is holding a small mechanical wheel.

Photograph, taken from across the river, of the Cazadero powerhouse/Station G. Part of the roof is incomplete, and three pipes run from the building up the hill. A stairway next to the pipes goes from the building to the top of the hill.

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

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 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 taken during a flood in February of 1890, showing an old Station A building in Oregon City surrounded by moving water. In the foreground of the frame a wooden waterwheel is visible. An older paper frame can be seen around the edge of the photograph.

Photograph taken at Station L (later the Oregon Museum of Science and Industry) taken from a high angle showing wooden pilings over water in the foreground, with piles of cut logs in the distance. Several people can be seen on a wooden structure at the left side of the frame, as well as a group standing on a raised platform cutting logs towards the right side. In the distance, a building on a raised dock structure with a large “Portland Railway, Light & Power Co.” sign can be seen. Written on the glass is “L276.”

Photograph taken of the hog fuel pile at Station L (now the Oregon Museum of Science and Industry). An unhitched wagon sits at the base of the hill to the right, and a “no trespassing” sign is visible near the center of the frame. In the distance, a person can be seen standing at the top of a pile.

Photograph showing brickwork of furnace of boiler #6. Bricks are visible on all walls, and an arched opening in the middle of the frame is built of bricks.