| 2. |  | BP Bridge, spanning Columbus Drive, November 22, 2003 | Girders; Scaffolding; Hoisting machinery; Skyscrapers; Cantilever construction; | View from below of BP Bridge's newly installed box girders. Columbus Drive was closed to traffic for a 12-hour period as workers installed three box girders making up BP Bridge's span. The Jay Pritzker... |
