Quad-City Times: Quad City environmentalist Chad Pregracke is proposing a national park that would place a herd of bison atop a bridge spanning the Mississippi River. As Pregracke warned, the Bison Bridge idea is “way outside the box.” The current Interstate 80 bridge between Le Claire, Iowa, and Rapids City, Ill., is being replaced. Pregracke’s plan would use the vacated bridge and state-owned land on each end of it to create either two state parks or,  ideally, a national park that crosses over the Mississippi River. The Illinois-bound span would become a bike and pedestrian span while the Iowa-bound span would become a path for bison to travel between park acreage on each side.