Developers of four Chicago sites have provided details of their Amazon bids to the Tribune. Those sites are Lincoln Yards, the planned redevelopment of the former A. Finkl & Sons steel plant and other land along the Chicago River in Lincoln Park and Bucktown; the vacant old main post office along the river and Congress Parkway; 37 acres owned by broadcast company Tribune Media along the Chicago River near Chicago Avenue and Halsted Street; and the former Michael Reese Hospital site and nearby land in Bronzeville.