17:36

Every Kind of Bridge Explained in 15 Minutes

10:05

Fechaduras da cascata-ponte dos deuses-rio de Colômbia

1:05:22

Bridge of the Gods Landslide

7:27

Crisis on the Columbia River

13:29

Building the San Francisco Oakland Bay Bridge (1937)

5:42

A peek at the construction of the Mackinac Bridge

36:26

Vanport and the Columbia River Floods of 1948

13:46

Northern Pacific Railroad Disaster - The Brainerd Bridge Collapse of July 27, 1875