| Alfred Hart Blasting at Chalk Bluffs above Alta. Cut 60 feet deep [Central Pacific Railroad, California. Scenes in the Sierra Nevada Mountains.] 1865-1869 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00478 (digital file from original photo, front) LC-DIG-stereo-2s00478 (digital file from original photo, back) LL/108985
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