A man known for cleaning up rivers in America has just announced his latest "big idea." Chad Pregracke wants to save the current I-80 Bridge if it's replaced, and turn it into Bison Bridge.
Pregracke says it all started about 25 years ago when he hired a plane to take him up over the bridge and interchange on the Illinois side, in Rapids City. Then five years go, a tornado tore through the interchange, breaking and blowing down trees. He and his group, Living Lands and Waters, have been trying to restore it ever since.