Official websites use .mil
Secure .mil websites use HTTPS
The Chicago Regulatory Branch handles Lake County, Porter County, and LaPorte County north of I-80/I-90.
Regulatory Branch 231 South LaSalle Street, Suite 1500 Chicago, Illinois 60604 Phone (312) 846-5530 Fax (312) 353-4110 LRCREGWEB@usace.army.mil