Photograph of 2 bulldozers on railroad tracks at the base of a hillside. Taken from behind the bulldozers, the drivers of both machines look back at the camera.

Photograph of 2 men standing on either side of a railroad track. In the middle of the track are several rails to be used for railroad construction. Likely taken near Fort George Wright near Spokane, Washington. Handwritten note on the back of the print reads, "Don Thomas, roadmaster on right. Conductor on Work Extra on left. Welded rails to be layed in tunnel just west of Ft. Wright. Please return to JvW." Stamp on the back reads, "W.J.C. Jul 20, 1953."

Photograph showing 2 railroad routes. On the right, a railroad track winds around the side of a mountain. On the left, a railroad bridge crosses a steep area of the same mountain. A few automobiles and a piece of construction equipment sit near the tracks on the lower right. Typed note on the back of the print reads, "Line change - S.P.&S. Ry. Co. Sep. 8, 1951." Stamp on the back reads, "Taken by Wyatt S. Peck for Natt McDougall Company." Second stamp indicates this is a Kodachrome enlargement made by Kodak on November 1, 1951.

Photograph of a group of railroad construction workers working on a railroad track. They stand between the track and a pile of rocks and dirt. Several carry shovels. Most of them look at the camera. There is a train on the right. Stamp on the back of the print for Arthur M. Prentiss, Commercial Photographer.

Photographic postcard showing 3 men on an American railroad ditcher belonging to SP&S Railway. The ditcher is on a flat railway car as it moves dirt from the train onto the side of the railroad track. Likely taken in Oregon or Washington. Handwritten note on the back of the postcard reads, "McRyan(?) Collection."

Photograph of Sheridan Point on the Washington side of the Columbia River Gorge, showing where Portland & Seattle Railway plans to construct a railroad. The Columbia River and the Oregon side of the gorge are visible on the right. Handwritten note on the back of the print reads, "Sheridans Point, Columbia River, showing where the P&S Ry. is to be built.

Photograph looking through a railroad tunnel on the Washington side of the Columbia River Gorge. A person stands in the opening at the far end of the tunnel. The tunnel goes through a rock face. Handwritten label at the bottom of the print reads, "SPS, 959. Tunnel at Drano, P&S Ry."

Photograph of an explosion conducted by Portland & Seattle Railway to clear way for the construction of a railroad. The explosion appears to lift a hill as dirt and debris fly into the air. Handwritten note on the back of the print reads, "95 ton explosion, Cow Creek Wash, photo caught just as powder was lifting the hill."

Photograph of a railroad tunnel being constructed through a large rock face on the Washington side of the Columbia River Gorge. The opening of the tunnel is blocked by a large pile of rocks and debris. Handwritten label at the bottom of the print reads, "SPS, 959-40. Tunnel at Drano, Looking East. P&S Ry."

Photograph of railroad construction workers standing in an unfinished rock cut. Steep rock cliffs rise all around them and one person stands on the cliff above them. Railroad tracks, still under construction, end at the rock face behind the workers. Taken on the Washington side of the Columbia River Gorge. Handwritten note on the back of the print reads, "Rock cut at 1488." Second note reads, "MP 52.5 near Carson, tracks at left to river's landing."

Construction of Spokane, Portland & Seattle Railway Tunnel 15 near Farrington, Washington. Two unidentified people stand on partially constructed railroad tracks underneath a wooden support structure. The Snake River is visible on the left side of the photograph. A handwritten note on the back of the photograph reads, "Cable Dump (?) and Tunnel. Pine Tree Rapids. This fill is 200 feet from bottom coulee to grade. Tunnel 15 west of Farrington, M. P. 266.3"

Photograph of 2 groups of men facing each other at a railroad construction site on the Washington side of the Columbia River Gorge. The men on the left stand around a railroad track under construction and watch as a construction worker clears the land. The men on the right appear to be construction workers, and they look up at the other group. Homesteads are visible in the background. Handwritten note on the back of the print reads, "Troubles between the P. & S. and C. Valley men at Carson, Wash." Second note reads, "Near Monaghan Homestead. Return to Traffic Dept., SP.S Ry."

Photograph of a crew of 6 men preparing to blast an area for railroad construction for the Portland & Seattle Railway. Likely taken on the Washington side of the Columbia River Gorge. Handwritten label at the bottom of the print reads, "Preparing to Load 30 Ton Blast, P.&S. Ry."

Photograph of 4 railroad construction workers standing in an unfinished rock cut. Steep rock cliffs rise all around them. Railroad tracks, still under construction, end at the rock face behind them. Taken on the Washington side of the Columbia River Gorge. Handwritten note on the back of the print reads, "Rock cut at 1488 near Carson landing." Second note reads, "Return to Traffic Dept., SP.S Ry."

Photograph of a large pile of rock and debris formed by a blast at a railroad construction site on the Washington side of the Columbia River Gorge. On the right, a person stands on the edge of a cliff, above the debris. A railroad is visible behind the debris. There is a large rock formation behind the railroad on the left. Handwritten note on the back of the print reads, "Shot from 400 kegs powder at 'Briton's Peak' Smith Creek near Carson landing."

Photograph showing clouds of debris rising from an explosion conducted by Portland & Seattle Railway to clear way for the construction of a railroad. Taken at Cow Creek, Washington. Handwritten note on the back of the print reads, "95 ton explosion, after the rock had settled."

Photograph of a work train crossing a railroad bridge that is under construction. Taken from the bank of a river, looking up at the bridge. Wooden planks for construction float in the water in the foreground. Handwritten note at the bottom of the print reads, "Sep 12 - 07, First work train."

Photograph of 3 bridge piers under construction in an unidentified body of water. A railroad bridge, also under construction, can be seen on the far bank of the water, on the left, approaching the piers. Handwritten label on the bottom of the photograph reads, "Piers 2, 3 and 4 in background, May 1, '07."

Photograph showing construction workers holding picks on a steep hillside near Carson, Washington. Rocks and dirt fall to the ground beneath them. Handwritten note on the back of the print reads, "Trapping at Carson Landing, 1906."

Photograph of a coyote hole on a rocky hillside, part of a railroad construction on the Washington side of the Columbia River Gorge. Handwritten note on the front of the print reads, "1589, Coyote Hole before blast. Sept. 28, '06." Handwriting on the back of the print reads, "Johnson & Lawson's cut near Stevenson."

Photograph of 4 railroad construction workers working in a trench at the base of a graded hillside in Carson, Washington. They work next to a track that transports construction materials. To the right is the Columbia River and a view of a large mountain on the Washington side of the gorge. Handwriting on the bottom of the print reads, "1516, Finishing Station 1515, June 23 '06, P.&S. Ry." Handwriting on the back reads, "Carson Landing."

Photograph of an explosion conducted by Portland & Seattle Railway to clear way for the construction of a railroad on the Washington side of the Columbia River Gorge. The explosion sends dirt and debris into the air out of the base of a mountain. The Columbia River and the Oregon side of the gorge are visible in the background. Handwritten label at the bottom of the print reads, "Firing 30 Ton Blast Cooks, 1906, P. & S. Ry., June 13, 10:35am, 1300 feet away."