Arkadia Apartments Chicago, Illinois Case Foundation Company chose an IMT 220 drill rig and a Bauer BG40 drill rig to install 51 soil bearing and rock bearing caissons from August through September 2013. 25 belled caissons support the Podium and Parking Garage. Each belled caisson has a 3ft to 4ft diameter shaft and a 9ft to 12ft diameter bell and are founded on hardpan approximately 60ft below grade. 26 3ft to 8ft diameter top of

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