Published August 18, 2011, 12:00 AM
Work takes place on the building of the Chicago Sanitary and Ship Canal
In this undated photo provided by the Metropolitan Water Reclamation District of Greater Chicago work takes place on the building of the Chicago Sanitary and Ship Canal. The Army Corps of Engineers is studying whether to separate the Great Lakes and Mississippi watersheds, which could include returning the Chicago River's original flow in an attempt to stop Asian carp and other invasive species from traveling through the two basins. The flow of the river into the lake was reversed in the late 1800's to prevent pollution from reaching Lake Michigan. (AP Photo/Metropolitan Water Reclamation District of Greater Chicago,HO)
Read the article: Huge fish spurs call to 're-reverse' Chicago River
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