Top 25 of 2001 -- Seattle DJC.COM

#3. I-90 Sunset Interchange modification, Stage 2

Original contract amount: $39.10 million

Image courtesy of WSDOT

Project address:
Interstate 90 at the East Sunset Way exit, Issaquah

Start of construction: April 9, 2001

Expected completion date:
Fall 2003

Owner:
Washington State Department of Transportation

Description Congestion problems in the Issaquah area of the I-90 corridor will become acute as new commercial and retail developments take shape, such as the new Microsoft campus and the Town Center retail core.

Currently there is one eastbound and one westbound onramp at East Sunset Way. The new interchange will address increased demand in the coming years.

Kiewit Pacific is constructing four new bridges: one post-tensioned cast-in-place bridge, two structural steel tub bridges, and one precast post-tensioned concrete tub bridge. Mechanically stabilized earth retaining walls and soldier pile walls also feature in the design.

A series of detention and water treatment ponds were constructed to protect Issaquah Creek from construction site runoff.

PROJECT PARTICIPANTS

Contractor:
Kiewit Pacific, 4094 Lake Washington Blvd. N.E., Renton, WA 98056-0320, (425) 255-8333

Engineer:
Matt Preedy, 3241 118th Ave. S.E., Suite B, Bellevue WA 98005-4138, (425) 649-4436

Other Participants
Apply-A-Line Inc.	AVAR Construction Systems Inc.	Benge Construction Co.
Buckley Nursery Co. Inc.	Chandler Construction Inc.	Cherry Valley Logging Co. Inc.
Concrete Products of Western Washington	Concrete Technology Corp.	D.S. Purcell Painting Inc.
Harvard Steel Inc.	K&L Rebar Inc.	Landel Corp.
Malcolm Drilling Co. Inc.	Mount Saint Helens Fence Inc.	Northwest Boring Co. Inc.
Northwest Cascade Inc.	Novito Construction Inc.	Peterson Brothers Inc.
Pioneer Co.	Plem Co.	Signal Electric Inc.
Skyline Steel	Stoneway Concrete	Stowe Construction Inc.
The D.S. Brown Co.	Universal Structural Inc.	Utility Vault Co.
Watson Asphalt Paving Co. Inc.