The Old Chicago Main Post Office Redevelopment was an approved project on a lot located along the Chicago River on the southwest side of Downtown Chicago , Illinois to be constructed in phases over a period of one decade that would have includes the renovation of Chicago 's historic Old Main Post Office building as well as residential , retail , entertainment and office space .
The Old Chicago Main Post Office Redevelopment is a proposed 20 acre project on a lot located along the Chicago River on the southwest side of Downtown Chicago , Illinois to be constructed in phases over a period of one decade that will include the renovation of Chicago 's historic Old Main Post Office building as well as residential , retail , entertainment and office space .