Rendering of a bridge with two arches on either side of a central span with no arch.
Example of a Tied Arch Long Span
Rendering of a bridge. The center span is flanked by four towers. The two outer spans each have two smaller towers, with many cables running down from the top in a fan-like pattern to connect to the edges of the span.
Example of a Cable Stayed Long Span
Rendering of a bridge with three trusses. The center truss is flanked by four towers.
Two renderings. The first is labeled Bascule, and shows an entire bridge span being lifted between two towers while remaining level. The second is labeled Lift, and shows a bridge span with no towers opening and lifting from the center like two leaves.
Example Movable Span Types

An important next step in the process is to identify the type of long span and movable span to design and build. Long span bridges come in different types, such as cable stayed, tied arch and through truss. Since there is a movable span associated with the preferred alternative, we’ll also consider different movable span types, such as vertical lift (like the Hawthorne and Steel bridges) and bascule (like the Burnside and Morrison bridges). From fall 2020 to summer 2021, we will work with the community, agencies and industry professionals to help select a bridge type.

Key Milestones:

  • January/February 2021: Community input on a range of feasible bridge types and evaluation criteria
  • May 2021: Community input on a recommended bridge type

Your input is important! Sign up for project emails to stay informed and weigh in at key milestones.