Nicholson Bridge I couldnt visit home without taking a short 6 mile drive to visit the Nicholson Bridge. This is a very historic bridge. Tunkhannock Viaduct (also known as the Nicholson Bridge) is a concrete deck arch bridge that spans the Tunkhannock Creek in Nicholson, Wyoming County, Pennsylvania in the United States. It was the largest concrete bridge in the U.S. when it opened, and remained so even 50 years later.