Can we classify "dams" and "pipelines" into one word? I'm doing my summary of a passage. Is infrastructure suitable?
Both dams and pipelines are examples of infrastructure, so in short, you can use it as an umbrella term in this way. That said, as J.R. says in a comment infrastructure is a very general term that can include a great many things more than just dams and pipelines. If you provide more context about the passage we might be able to come up with a more specific word.