| Business | Phone |
| Land Acquisition Dept 100 W Randolph St 12, Chicago 60601 | (312) 814-4295 |
| Natural Resources 100 W Randolph St, Chicago 60601 | (312) 814-2071 |
| Natural Resources Dept 36 S Wabash Ave 1415, Chicago 60603 | (312) 793-5748 |
| Us Army Corps Of Engineers 111 N Canal St 600, Chicago 60606 | (312) 353-6400 |