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PBES Innovative Projects
Northeast 8th Street Bridge |
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| Location | NE 8th over IH 405 in Bellevue |
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| State | WA |
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| Completion Date | 2004 |
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| Contact Person | Jerry Weigel, P.E.,
Washington State Department of Transportation,
(360) 705-7207 |
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| Description | This bridge is 328 ft. long and 121.5 ft. wide. When the Northeast 8th Street bridge over busy IH405 in Bellevue needed to be replaced, the Washington Department of Transportation (WSDOT) chose a total prefabrication design that allowed it to stage the bridge beside the highway during construction and then move it into place. The south half of the new bridge was constructed in a temporary location south of the old bridge, and then traffic eastbound traffic was shifted onto the new portion while the north half of the old bridge was removed and rebuilt. Next, traffic was shifted onto the new north half, and the old south portion was demolished. Finally, the new south half was jacked off its temporary piers and rolled into place. The contractor moved the 2,200 ton structure in about 12 hours. Completed in 2004, the longer and higher total prefabrication bridge will accommodate widening of IH405 and accessibility conveniences for a new interchange just south of it. Choosing prefabrication over conventional reconstruction allowed WSDOT to avoid taking the bridge out of commission for up to a year or reducing its capacity by one-half for even longer. Atkinson Construction customized techniques to accommodate prefabrication requirements to minimize traffic disruption for downtown Bellevue. The total prefabrication construction caused relatively few disruptions to area drivers, with most closures limited to nights and select weekends and resulted in a wider, safer bridge with more lanes of traffic. |
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| Photo |  |
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| Prefabricated Elements | Total prefab bridges |
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| Other Keywords | totally prefabricated bridges |
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| Advantages | Minimized traffic disruption |
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| Photo Credits | Washington State Department of Transportation |
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Events
More Information
Contact
Reggie Holt
Office of Bridge Technology
202-366-4596
E-mail Reggie
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This page last modified on 05/12/08 | |
