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Project Details

Architect

HNTB Corp
Muller & Muller

Size

420-foot span with seventy-foot-tall pylons and a 1,100-ton center span

Photos

North Avenue Bridge



At the turn of the last century, Chicago made a name for itself with its innovative trunnion bascule drawbridges, building so many that they became known as "Chicago" bridges. McHugh continued to help the city make a name for itself in bridge design, with a unique hybrid cable-stayed/suspension bridge over the Chicago River at North Avenue.

One of the first such designs in the country, the 420-foot-span features three separate segments-east and west approach spans supported by cable stays, and a middle span over the river, then erected using a special truss built just for the task. Seventy-foot-tall pylons support the combined forces of the suspension and cable stay systems.

With closing North Avenue out of the question, McHugh erected a temporary span, placing it in just one day, before removing the 1907 bascule bridge whose two lanes could no longer handle the crush of modern traffic.

Awards

Outstanding Structural Contractor of the Year, Chicago Department of Transportation
Top Ten Bridges (#2), Roads & Bridges
Engineering Excellence Award, American Council of Engineering Companies
Merit Award, Institutional, Association of Licensed Architects
Transportation Project of the Year, American Public Works Association Chicago Metro Chapter