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Stereoview photograph #198 by Alfred Hart for the Central Pacific Railroad collection. Photograph features a railroad worker with a dump cart standing in the entrance to a tunnel in the Sierra Nevada mountains. Caption: "East Portal of Summit Tunnel,…
Stereo-view of Union Pacific railroad workers in Echo Canyon at Tunnel No. 3 during the construction of the transcontinental railroad. Image taken by photographer A.J. Russell.
Stereo-view of Union Pacific laborers on a railroad hand cart outside of West end of Tunnel #4. Image taken by photographer William Henry Jackson before he joined the Hayden Survey photographer and during the construction of the transcontinental…