Concrete filled hole

Last week, the construction on the Hot Metal Bridge project involved digging big holes for what I assumed to be footers for the ramps that will go at the Eliza Furnace Trail end of the bridge. Sometime today (12 weeks into the project) they poured a layer of concrete into one of the holes. They also have rebar structures to reinforce the bridge abutments or supports. It's beginning to take shape across Second Avenue as well, with some concrete walls and at least one concrete pylon. I don't know what's going on at the South Side end but one of the bridge sections is covered as they sand blast.