35 Ill. Adm. Code 301.247
Chicago Area Waterway System
Section 301.247Â Chicago Area Waterway System
"Chicago Area Waterway System" means Calumet
River, Grand Calumet River, Little Calumet River downstream from the
confluence of Calumet River and Grand Calumet River, Calumet-Sag Channel, Lake
Calumet, Chicago River and its branches downstream from their confluence with
North Shore Channel, North Shore Channel and Chicago Sanitary and Ship Canal.