35 Ill. Adm. Code 301.245
Calumet River System
Section 301
Section 301.245Â Calumet
River System
"Calumet River System"
means the Calumet River, the Grand Calumet River, the Little Calumet River
downstream from its confluence with the Grand Calumet, the Calumet-Sag Channel,
and the Calumet Harbor Basin.