209825 - Redmond 520

May 2009

KLB broke ground back in May of 2009 on the SR 520 West Lake Sammamish Parkway to SR202. The project in King County is the final phase of a three phase project started in the 1990’s.  A new ramp that connects WB SR 202 to WB SR 520, and additional HOV and merge lanes on SR 520 between W. Lake Sammamish Pkwy and SR 202 are a part of this final phase.

As a main subcontractor to PCL Construction KLB has approximately 32% of the total contract and is constructing 10 SEW walls for approximately 100,000 SF of Keystone block and precast walls.  In order for crews to accomplish this it required clearing and grubbing of 29 acres on both the north and south side of SR520.  Along with the walls a large portion of KLB’s work will be installing 98 drainage structures and about 7,000 LF of drainage.  KLB is importing 250,000 tons of gravel borrow and SEW backfill along with 100,00 CY of embankment.

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PO Box 158, Mukilteo, WA 98275  •  (425) 355-7335  •  Site by Jon Raasch