Twitter user @henjealy spotted the temporary sidewalks on Monday.

Disregard any talk you may have heard about One South Halsted taking its sweet time getting started. A week after the foundation permit was filed by the City of Chicago, the apartment tower from Fifield Companies and F&F Realty has emptied and cordoned off the parking lot, set up temporary sidewalks on Halsted and Madison Streets, and knocked down trees on the site. There are excavators on site, plus dump trucks, equipment trailers, even a cement mixer. And, as of 9:20 this morning, one of those excavators is tearing up the asphalt.

The former Crowne Plaza parking lot has been a flurry of activity all week. Yep, One South Halsted is ready to roll into the West Loop.