After World War II, infrastructure construction took off in the United States, and dams were one of the key drivers. Big jobs, they required big machines to get the job done. The Garrison Dam in North Dakota, the fifth-largest earthen dam in the world, was built across the Missouri River, starting in 1947 and producing power by 1953.
This film from Allis-Chalmers shows the scale of the work - and the machinery - that went into building this massive project. Plus, it digs in to show the effort that went into maintenance and keeping that work moving.