Photograph of a covered bridge across a river. The words “NOT RESPONSIBLE FOR ACCIDENTS” are painted on one of the pillars supporting the bridge.

Photograph of a dirt road leading to an unidentified bridge in a forested area. The number 6 is written on the negative and is visible in the lower right corner of the image.

Photograph of an unidentified wooden bridge in a forested area. The number 11 is written on the negative and is faintly visible in the lower right corner of the image.

Photograph showing fallen decking, beams, and other debris in the water near a bridge.

Photograph showing an unidentified covered bridge over a river and the trestle leading to the bridge. The trestle and bridge are surrounded by forest. The text “Bridges - Clackamas County” is written on the negative sleeve. See related image No. 376G0146.

Photograph showing an unidentified covered bridge over a river and part of the trestle leading to the bridge. The text “Bridges - Clackamas County” is written on the negative sleeve. See related image No. 376G0145.

Photograph of a ship, the California State, at anchor. An unidentified bridge is visible in the background.

Stereograph view of an Oregon Steam Navigation Co. steam locomotive approaching from the east on the company’s portage railroad around the Cascades of the Columbia River, Skamania County, Washington Territory, 1867. South of the locomotive are ruins of the High Bridge, built by the military in 1860 to cross the Hamilton Creek drainage, and the Chenoweth/Putnam tramway.

Duplicate of Stereograph 1265, on a different mount. Stereograph view of an Oregon Steam Navigation Co. steam locomotive approaching from the east on the company’s portage railroad around the Cascades of the Columbia River, Skamania County, Washington Territory, 1867. South of the locomotive are ruins of the High Bridge, built by the military in 1860 to cross the Hamilton Creek drainage, and the Chenoweth/Putnam tramway.

Stereograph of the Oregon Railway & Navigation Co.'s bridge over Eagle Creek, Columbia River Gorge, Oregon, 1883

Stereograph of the Oregon Railway & Navigation Co.'s railroad bridge over Hood River, circa 1883. Items 2/82 and 2/83 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/82: "Hood River Crossing, Columbia River Scenery, Oregon."

Stereograph of a tooth bridge along the Columbia River Gorge.

Stereograph of the Tooth Bridge, located west of Eagle Creek in the Columbia River Gorge and part of the Oregon Railway & Navigation Co.'s railroad line on the Oregon side of the Gorge, circa 1882.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad, and this stereograph depicts one of the railroad's trestle bridges in California.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad, and this stereograph depicts one of the railroad's trestle bridges in California.

Railroad tracks belonging to the Oregon Steam Navigation Co. at Eagle Creek Crossing in the Columbia River Gorge. Bradford Island is visible across the Columbia River. Loose duplicate plate in Box 5. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

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 the Clackamas River in the River Mill area, with numerous “islands” and cliffs. A wooden suspension bridge can be seen spanning two cliffs near the center of the frame, with numerous wooden buildings visible in the distance. Written on the negative is “#58M. 8-12-10.”

Photograph looking downstream looking towards the “island,” with a wooden suspension bridge visible. In front of the bridge a blurry man can be seen facing the camera. Beyond the bridge is a small wooden building next to several vertical poles. Written on the negative is “#60M. 10-10.”

Photograph of unidentified bridge crossing body of water, with shoreline visible at right side of image. Taken from a straight vantage point looking down the tracks, a train can be seen in the distance, as well as numerous wooden buildings and electric lines. Likely the same bridge shown in PGE 132-1.

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 looking down the Sandy River trestle bridge, showing wood structure and railroad track. The hillside drops off on each side of the track, showing trees and stumps.

Aerial photograph of Florence and the mouth of the Siuslaw River, looking north. Roads, plots, and the Siuslaw River Bridge are visible.

View of the Oregon Trunk (OT) Rail Bridge across the Columbia River near Wishram Washington. The photograph is taken from the tracks on the Washington side of the bridge looking south through the trusses. The bridge is also known as the Celilo Bridge. A note on the back of the photograph reads, "File No. 66 - OT/Celilo Bridge across Columbia River, near Wishram, Wash. Kiser 5475."