High-quality black-and-white photographs of large old machines and tools

[Ralphxyz]

Are they still in use?

Ralph

[bruce.desertrat]

Are they still in use?

Ralph

Doubt it, those ladders look pretty flimsy

They may be still in use, this is the Wikipedia article on the plant, based on the probable age of the photo. The plant has undergone refurbishment starting in 2012.

[Frank S]

Had an uncle who when he thought us kids were a little too much under his feet while he was doing something. Would often say boys if you don't get your big feet out of my way I', going to run over them with a steam roller