To operate the line the Northern Pacific ordered the two largest steam locomotives in the world (at that time). Despite their size, the steep grades meant one locomotive was stationed at each end of their five-car trains. Trains took an hour and fifteen minutes to traverse the eight-mile (13 km)-long switchback, a brakeman riding the rooftops every two cars. The first experimental train over the switchback was on June 6, 1887. The first scheduled passenger train over the switchback arrived in Tacoma at 7:15 PM on July 3, 1887.