28,000+ people petition to turn I-80 into a Bison Bridge The proposal follows a study from the Illinois Department of Transportation into a replacement for the 55-year-old bridge. Author: David Bohlman (WQAD) Updated: 5:59 PM CDT April 23, 2021 ROCK ISLAND, Ill. — More than 28,000 people have signed the petition to turn the 55-year-old I-80 bridge into a Bison Bridge and the traction behind the notion only continues to grow. Environmentalist icon, Quad City native, and President of Living Lands and Waters Chad Pregracke unveiled a project to repurpose the I-80 bridge to bring new interest to the Quad Cities from the local and national level by turning it into a wildlife view and tourist spot.