CaissonFest is underway at 400 Lake Shore, as Keller North America and team have begun drilling into the earth around the old Chicago Spire’s cofferdam. I’m told about 50 caissons need to be drilled & filled to supplement the support offered by that big hole in the ground, the one that just got a boatload of concrete dumped into it. So this crew should be around for awhile.

Lots of equipment, lots of people on site. So, lots of photos.

Enjoying the photos? Metra and CTA rides (and Amtrak trains to Milwaukee), Zipcars, Divvy Bikes, camera lenses, domain fees, snacks & energy drinks, and comfortable walking shoes add up. You can help offset expenses by making a greatly-appreciated donation to Building Up Chicago.