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Cliff-Hanger

by Jon Heacock, P.E., Proj. Mgr.; Oregon Dept. of Transp.'s Crooked River Proj.,
Steven Starkey, P.E., Proj. Engr.; Oregon Dept. of Transp.'s Crooked River Proj.,
David Goodyear, P.E., Sr. Vice Pres. and Chief Engr. for Design and Constr.; DGES, Olympia, WA,
Norm Smit, P.E., Proj. Engr. and Proj. Mgr. for Design and Constr.; DGES/T. Y. Lin,


Serial Information: Civil Engineering—ASCE, 2001, Vol. 71, Issue 1, Pg. 40-45


Document Type: Feature article

Abstract:

To create an arch bridge over a river gorge in Oregon without disturbing the canyon walls or floor below, engineers combined a segmental construction scheme with a temporary cable-stay technology. The design features a 410 ft (125 m) arch span and a bridge deck length of 535 ft (163 m). The arch rises 79 ft (24 m), with a rib that is 6.5 ft (2 m) thick at the springing and tapers to 4 ft at the crown. The deck is 79 ft (24 m) wide, flaring out over the 43 ft (13 m) wide arch to create a soaring effect. Stays from two temporary towers on opposite sides of the gorge supported a casting traveler that placed 15 arch sections. The bridge was opened in August 2000.

Subject Headings: Arch bridges | Arches | Infrastructure construction | Cables | Cable stayed bridges | Bridge decks | Walls

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