This is just west of the bridge the buses take to go over the trench. They appear to be building some sort of cover over the trench.
South Keys station is advancing well. It will enable transferring between Line 2 (Trillium Line) and Line 4 (Airport).
The southern and northern underpass pits, I believe both are now at their final depths The southern pit has wooden barriers. I'm not too familiar with the construction but I now believe that the tunnel stub will be within the southern underpass. It is off to the side of where I think the underpass will be so I'm not sure what the barriers would be for it otherwise. It is also far closer to the Carleton University tunnel system for future attachment.
At the EY Centre and Uplands, large crane in place for Uplands Station construction on Ottawa International Airport spur.
At S. Bowesville Rd overpass the structure is complete, but no embankments yet. Future Station and Park & Ride will be to the East side.
At Earl Armstrong crossing near Bowesville, the bridge is complete, it can span 4+ lanes. Will that magnificent, rare American Elm survive?