My father worked for a regional bridge construction company. This is a project photo from his files of their jobs.
There is work going on in this photo which has not been seen in the USA in many decades. As part of a DOT contract, the bridge contractor is forming and pouring his own reinforced (not prestressed) concrete piles for driving on the project.:
“A” shows completed octagonal reinforced concrete piling:
“B” (below) shows concrete placement underway for three piling. Note the worker by the crane, with the concrete bucket. He is ready to receive concrete from a mixer truck, then the crane will lift the filled bucket to the work area:
“C” (below) shows a “jig” for assembly of the rebar cage used in each pile. Note the pile of rebar next to the jig: