The historic Rainbow Bridge near Smiths Ferry is Idaho’s largest single-span concrete arch structure. It was designed by the state’s first chief bridge engineer and built in a single year in 1933.

Idaho is embarking on replacing one of the state’s most iconic river spans after nearly a century. The Rainbow Bridge, just north of Smiths Ferry and an hour outside of McCall, is approaching ...

The Rainbow Bridge, just north of Smiths Ferry and an hour outside of McCall, is approaching the end of its designed life as the state faces growing traffic demands on Idaho 55, according to the Idaho ...