These are the office locations within the Chicago District. See below for mailing address and phone numbers.
Chicago District Headquarters
U.S. Army Corps of Engineers
Chicago District
231 S. LaSalle St., Suite 1500
Chicago, IL 60604
(312) 846-5330
Indiana
Calumet Area Office
906 N. Griffith Blvd
Griffith, IN 46319
(219) 923-1763
Indiana Harbor Office
3500 Indianapolis Blvd
East Chicago, IN 46319
(708) 467-0380
J. Edward Roush Lake
735 N. Warren Road
Huntington, IN 46750
(260) 356-8648
Mississinewa Lake
5613 E. Mississinewa Dam Road
Peru, IN 46970
(765) 473-5946
Salamonie Lake
6420 E. Salamonie Dam Road
Lagro, IN 46941
(260) 782-2358
Upper Wabash Project Office
6297 E. Salamonie Dam Rd
Lagro, IN 46941
(260) 782-2181
Illinois
Chicago Harbor Lock House
108 North Streetor Drive
Chicago, IL 60611
(312) 787-4795
Monitoring VHF marine channels: 14 & 16
Mile 327 on the Illinois Waterway, Chicago River at Lake Michigan
Chicago Sanitary and Ship Canal Electric Dispersal Barrier
790 E. Old Romeo Road
Romeoville, IL
(312) 375-8418
Northern Area Office
620 Barry Rd, Bldg. 158
Great Lakes, IL 60088
(847) 688-4431
Lockport Lock & Dam
2502 Channel Drive
Lockport, IL 60441
(815) 838-1309
TJ O'Brien Lock & Dam
*Delivery address for FedEx and UPS
1831 E. 130th ST
Chicago, IL 60633
TJ O'Brien Lock & Dam
*Business address for USPS
134th & Calumet River
Chicago, IL 60633
Wisconsin
Kewaunee Operations Office
124 N. Main St.
Kewaunee, WI 54216
(920) 388-3720
Appleton Area Office
2619 East Capitol Drive
Appleton, WI 54911
(920) 380-7101