Photograph of a train crossing the Sandy River bridge at Dodge Park, Bull Run. A total of eight passenger train cars can be seen crossing the trestle bridge, under which river rocks and water can be seen.

Photograph taken from a side angle of a wooden and metal trestle bridge over the Molalla River. A person can be seen standing at the top of a hill in the distance. Railroad tracks appear to pass over the bridge.

Photograph taken from a side angle showing a wooden trestle bridge with an open gap before the installation of a steel span. Rocks and dirt can be seen in the foreground, and a hillside with bare trees behind the bridge. Written on the negative is “E301.09-O-296.”

Photograph showing the northern side of the wooden North Fork trestle bridge, before completion. Behind the bridge is a loose dirt hillside with trees at the top.

Photograph taken from a side angle, showing an incomplete wooden trestle bridge crossing a dirt ravine. A small creek is running downhill and under the bridge, while trees and mountains are visible in the distance. Two men can be seen standing on the left side of the bridge.

Photograph showing the top surface of a wooden trestle bridge and a dirt road, with a wooden flume and dam structure visible in the distance (Cazadero Dam). In the background, forested hillsides can be seen above the Clackamas River. Written on the negative is “E301.09-O-23” and “32.”