KNOWLTON TOWNSHIP - A woman was rescued Thursday after she was injured while climbing inside a viaduct in Warren County.

According to officials, two college-aged women were exploring the Paulinskill Viaduct in the Columbia section of Knowlton Township. One of the women fell into a manhole and became trapped inside one of the viaduct’s arches.

Fire departments and rescue teams from all over New Jersey responded to the scene. It took over 50 firefighters and technical rescue personnel nearly five hours to get the woman out, according to officials. She suffered a broken ankle and was taken to Morristown Medical Center.

The other woman was not injured and was escorted off the viaduct by firefighters.

According to a spokesperson for New Jersey State Police, the two women will face criminal trespassing charges. 

The Paulinskill Viaduct closed to rail traffic in the 1980s. The location has become a popular attraction for urban explorers. 

The viaduct was built in 1910 and serviced the Delaware, Lackawanna and Western Railroad line. At the time it was considered the largest reinforced concrete structure in the world.