The three options are stated in a letter dated June 11, 2013 to the Spring Township Supervisor, Ryan Kufalk. See the entire letter by going to : https://www.boarddocs.com/il/boone/Board.nsf/files/98RTWJ65EA83/$file/Tollway%20bridge%20letter%206-11-13_201306171321.pdf
The three alternatives are:
1. Removing Johnson Road Bridge.
2. Removing another township bridge
3. Share in the maintenance of bridges replaced and replace bridge in year 60. Total costs are approximate.y $1,000,000 with most cost coming in year 60 for the actual bridge replacement at a cost of $850,000.