Green River (Illinois)

Green River
Physical characteristics
Source 
  locationReynolds Township, Lee County south of Rochelle, Illinois
  coordinates41°51′26″N 89°05′30″W / 41.8572518°N 89.0917616°W / 41.8572518; -89.0917616 (Green River origin)
  elevation775 ft (236 m)
Mouth 
  location
Confluence with Rock River near Quad Cities
  coordinates
41°28′09″N 90°23′43″W / 41.4692011°N 90.3954067°W / 41.4692011; -90.3954067 (Green River mouth)
  elevation
558 ft (170 m)
Length89 mi (143 km)
Discharge 
  locationGeneseo, Illinois
  average704 cu/ft. per sec.
Basin features
ProgressionGreen River → Rock → Mississippi → Gulf of Mexico
GNIS ID409398

The Green River is an 89-mile-long (143 km) tributary of the Rock River in northwestern Illinois in the United States. Via the Rock, it is part of the Mississippi River watershed. Much of the Green's course has been straightened and channelized. The Green River was created to drain water from former swamps to create better farmland. The Green River is home to many fish species including largemouth bass, smallmouth bass, hybrid bass, common carp, northern pike, and creek chub.