A guess, not an answer. You'll see what everyone else said.
Machine-generated description — written by an image model, not by a person.
Black and white photo depicts the construction of a reinforced concrete structure, possibly a dam or retaining wall. Visible are formwork, rebar, and unfinished concrete surfaces. The scene highlights engineering processes of the mid-20th century. Likely site documentation or promotional material.
constructionconcreteengineering1960smidcentury
What a machine spotted
A detector's list, not mine. It misses things and makes some up. Pick one to see where it looked.
Looks like these
A machine picked them, going by the picture alone. All from other rolls.