New concrete, new column

My general contractor arrives with his crew and sets up shop in my garage. Using a rented concrete mixer ($58.60), he begins re-pouring the concrete in the basement-level master bathroom, laundry room, and mechanical room around the new floor drain ($495.06).

A worker dispenses concrete from a mixer while another collects it in a bucket.
A worker lays new concrete over bare earth in a basement where part of the original floor had been removed.
New concrete dries in a patched basement floor.
New concrete cures around a newly installed basement floor drain.

A replacement support column is installed in the proper location under the main beam, restoring the integrity of the building structure ($113.25).

A new metal column has been installed in a basement to support an I-beam in the ceiling. \