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Undated Archway |
Undated Colorado (United States, Nor … Men displaying erosion over … |
Undated Colorado (United States, Nor … Constructing a railroad brid … |
Undated Colorado (United States, Nor … Constructing a railroad brid … |
Undated Southern Colorado (Colorado, … Constructing a railroad brid … |
Undated Colorado (United States, Nor … Train about to cross small b … |
Undated Colorado (United States, Nor … Engine no. 533 traveling ove … |
Undated Colorado (United States, Nor … Passenger train traveling ov … |
Undated Colorado (United States, Nor … Passenger train traveling ov … |
Undated Colorado (United States, Nor … Train traveling over bridge |
Undated Colorado (United States, Nor … Landscape with railroad brid … |
Undated Men constructing a bridge |
Undated Royal Gorge (Fremont, Colora … Royal Gorge suspension bridg … |
Undated Train travelling over bridge |
Undated Measurement of gorge from br … |
Undated Utah (United States, North A … Exterior of coal mine in Sco … |
Undated Southern Wyoming (Wyoming, U … Building a bridge |
Undated A train crossing a bridge |
Undated Northern Wyoming (Wyoming, U … Dale Creek Bridge |
Undated Dale Creek Bridge |