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I-5 - Chamber Way Overpass

Status

December 2017

Overview
The Washington State Department of Transportation will replace the existing I-5 Chamber Way overpass with a taller, wider structure.

On the morning of Friday, July 22, 2016, a semi-truck hauling a pair of excavators hit a portion of the Chamber Way bridge that spans over southbound I-5 in Chehalis, causing significant structural damage.

For the safety of the traveling public, the damaged span was demolished and a temporary bridge is currently in place.

 

Why is WSDOT building a new Chamber Way overpass?

The existing overpass was built in 1958 and does not meet modern design standards. The Chamber Way overpass is a two lane bridge spanning across the interstate, and is only 14 feet 8 inches above I-5.

WSDOT demolished a portion of the bridge that was damaged by an oversized load and installed a temporary bridge in the summer of 2016.

The End Result
A wider, taller overpass will keep people in Chehalis connected between a vibrant commercial center west of I-5 and the city center. 

The new overpass will be incorporated into a future project that will add improvements to I-5 and modify the adjacent intersections.

Project Benefits
Safety - The new overpass will replace the existing structure and temporary bridge that is currently in place.

Mobility - Chamber Way will have two lanes in each direction across I-5, with improved bike and pedestrian access.

What is the project timeline?
Spring 2017 - Design work begins
July 2017 - Construction begins
Fall 2017 - Chamber Way traffic will shift to temporary detour bridge
Fall 2018 - Scheduled completion

Financial Information

Financial Data for PIN 400516E
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $5,116
CWA $10,500
Total $15,616

Project signage will reflect the cost of construction engineering, project bid award and sales tax.

How can I get more information?
Contact:
Bart Treece
WSDOT communications
360-905-2058
Treeceb@wsdot.wa.gov

or

Frank Green
Project Engineer
360-905-1547
swrDB@wsdot.wa.gov

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