Interstate Bridge

The Interstate Bridge is a twin steel structure over the Columbia River between Portland and Vancouver. The center segments can rise vertically to let ships pass underneath.

The first span opened after World War I and connected both cities directly across the river for the first time. A few years later, a second parallel structure was built to meet growing traffic demand.

The structure connects Oregon and Washington across the river and carries both cars and a public transit line. Commuters and travelers cross the state border daily using the two parallel roadways in each direction.

Drivers crossing the span can expect delays when the lift sections go up for ships. Traffic stops briefly during these moments until the passage is clear again.

On some days you can look through the raised segments and see the steel structure from below. Large cargo ships and boats pass directly under the raised roadway.

Location: Portland

Location: Vancouver

Architects: HNTB

Official opening: February 14, 1917

GPS coordinates: 45.60667,-122.68083

Latest update: December 5, 2025 22:27