Helix Pedestrian Bridge
Helix Pedestrian Bridge from Sydney Thiel
Helix Pedestrian Bridge

completed: 2004
size: 420 lf span
construction cost: $10 million
role: Job Captain
phases of involvement: PD, SD, DD, initial CD
architect: Johnson Architecture & Planning
contractor: Sordoni-Skanska

A 420 foot pedestrian bridge linking the Elliott Avenue transportation corridor to Centennial Park and Amgen Research and Development Center (now Expedia). The bridge is formed by a single clear span arch supported by a pair of canted archtes, creating an abstract sculpture of the double helix DNA form and symbol of the Amgen corporation’s achievements in the field of biotechnology. The bridge is clad in stainless steel mesh and tensioned fabric membrane as it crosses the BNSF railway lines below.

Project Awards:
2007 Honor Award for Design Excellence, Helix Pedestrian Bridge, AIA-Seattle
2004 Krentz Award for Outstanding Steel Structure, Helix Pedestrian Bridge

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The bridge is sited to connect the busy arterial street of Elliott Avenue to the Amgen Campus and adjacent shoreline park along Elliott Bay.
Helix Pedestrian Bridge
Helix Pedestrian Bridge
Helix Pedestrian Bridge at center span
Aerial view with railroad tracks below
Aerial view with railroad tracks below
Technical Section of Bridge Span
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Bridge section at center span
Conceptual study model (2000)
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Helix Pedestrian Bridge

completed: 2004
size: 420 lf span
construction cost: $10 million
role: Job Captain
phases of involvement: PD, SD, DD, initial CD
architect: Johnson Architecture & Planning
contractor: Sordoni-Skanska

A 420 foot pedestrian bridge linking the Elliott Avenue transportation corridor to Centennial Park and Amgen Research and Development Center (now Expedia). The bridge is formed by a single clear span arch supported by a pair of canted archtes, creating an abstract sculpture of the double helix DNA form and symbol of the Amgen corporation’s achievements in the field of biotechnology. The bridge is clad in stainless steel mesh and tensioned fabric membrane as it crosses the BNSF railway lines below.

Project Awards:
2007 Honor Award for Design Excellence, Helix Pedestrian Bridge, AIA-Seattle
2004 Krentz Award for Outstanding Steel Structure, Helix Pedestrian Bridge

View Website
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Sydney Thiel
Project Manager, University of Washington Seattle, WA