Try to find the spot where the photographer was standing.
Siemens is a German concern
https://www.flickr.com/photos/66151649@N02 Thanks Brian.
https://www.flickr.com/photos/nlireland Poor old lonely photo with no info.
[https://www.flickr.com/photos/66151649@N02] We can change that!!
Siemens-Bauunion GmbH was founded in 1921 as a subsidiary of Siemens & Halske AG and Siemens-Schuckertwerke GmbH. Previously the Siemens parent companies had contracted out the civil engineering works necessary for the building of power plants, tramways and subways to external companies, but because they worked with these companies they had their own experienced staff of civil engineers and building workers. In order to make better use of this potential and to be in a position to offer large-scale building projects from a single source, it was clear that the parent companies would have to have their own construction company. In the 1920s, Siemens-Bauunion was responsible for the building of numerous hydroelectric power plants and subways. Much of the motorway construction in the 1930s was also carried out by the Bauunion. In 1972 Siemens sold the company to Dyckerhoff & Widmann AG.
https://www.flickr.com/photos/66151649@N02 I bet https://www.flickr.com/photos/swordscookie will tell us exactly where this shot was taken!!
Just below the chimney at right I see this building in the docks, so they are unloading on the North side of the Floating Dock here: 25" link.