A Landmark Bridge for the Future

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Title: A Landmark Bridge for the Future

Author(s): Terrence R. Udland, Russell D. Call, and J. Martin Bodemar

Publication: Concrete International

Volume: 27

Issue: 2

Appears on pages(s): 24-28

Keywords: box girder; Four Bears; ice; floe

Date: 2/1/2005

Abstract:
To maintain access across Lake Sakakawea, the existing narrow and functionally obsolete Four Bears Bridge is being replaced with a concrete box girder type. Because of the lake’s size and location in a northern climate, ice floes up to 600 ft (180 m) in diameter can occur. The design team therefore undertook a substantial investigation of ice forces and their effects on the deep foundations.