Hi-Line Bridge


At 3,860 feet long and 162 feet above the bed of the Sheyenne River, the Hi-Line Bridge is one of the longest and highest single track railroad viaducts in the U.S. Engineers working for the Northern Pacific Railroad designed and built the bridge to avoid the severe grades leading into and out of the Sheyenne River valley. Work began on the bridge in 1906, and the first official train crossed the trestle in 1908. A main link in the railroad's coast-to-coast system, it took on vital importance during both World Wars. To prevent sabotage during the wars, it was guarded by soldiers. The bridge is still used today by freight trains.

Activity Details

Activity Type:Trips and Destinations
Discipline:Civil
Topic(s):Structures
Grade:K-2, 3-5, 6-8, 9-12
Time:Full day

Fun Fact:The Hi-Line Bridge was built in 1906-08, using 14 million pounds of steel, 10,000 cubic feet of concrete, and 80,000 linear feet of wood piling. Excluding the rivets used in preassembled sections shipped from the factory, 380,000 rivets were used in the bridge's construction.