North Outfall Sewer construction, [s.d.]

Image shows section 34A of the sewer construction. At center, a deep ditch can be seen with slanted dirt walls on both sides.

At the center of the ditch, a large column can be seen with two wooden beams extending across the top of the ditch. A row of wooden planks have been placed along the beams, and a pile of wooden planks sits above the column. At the bottom of the column, a manhole opening can be seen.