Tunkhannock Creek Viaduct is a concrete deck arch bridge on the Nicholson Cutoff rail line segment of the Norfolk Southern Railway Sunbury Line that spans Tunkhannock Creek in Nicholson, Pennsylvania. Measuring 2,375 feet (724 m) long and towering 240 feet (73.15 m) when measured from the creek bed, it was the largest concrete structure in the world when completed in 1915 and still merited "the title of largest concrete bridge in America, if not the world" 50 years later.
A Steamtown National Historic Site excursion train crosses Tunkhannock Viaduct.
Tunkhannock Viaduct under construction in 1914
Tunkhannock Viaduct from the air
Tunkhannock Viaduct, as seen from Route 11
The Nicholson Cutoff is a rail line segment of the Sunbury Line rail line and formerly a rail line segment of the Delaware, Lackawanna and Western Railroad main line and the Delaware and Hudson Railway South Line. The Nicholson Cutoff and the rest of the Sunbury Line is owned by Norfolk Southern Railway.
The Tunkhannock Viaduct on the Nicholson Cutoff in 1989. Located near Milepost 162 in Nicholson, Pennsylvania, the bridge is 240 feet (73.15 m) high and 2,375 feet (724 m) long. It is believed to be the largest reinforced concrete structure in the world. The roadway, US Route 11, follows the right-of-way of the old line that the cutoff replaced.
The eastern starting point of the Nicholson Cutoff (milepost 152) in Clarks Summit in 1989 shows three Guilford Rail System pusher units awaiting their next assignment after pushing a long freight up the grade from Scranton, Pennsylvania. Note the weed-covered switch in the foreground, a vestige of the old line that ran past the Clarks Summit passenger station, about a mile away on the hill to the left. The station was not rebuilt even though the new line was a considerable distance down the hill from the old line.
