The Tunkhannock Viaduct, a reinforced concrete structure on the Delaware, Lackawanna & Western Railroad, was the largest of its kind ever built when it went into service in 1915. The bridge was 2,375 feet long and rose 240 feet above Tunkhannock Creek, and it was the focal point of a 39.6 mile relocation between Clarks Summit and Hallstead. The novelist Theodore Dreiser called the viaduct "one of the true wonders of the world."