Project News

Flatiron Secures Contract for Critical Infrastructure Project in Washington


Image provided by WSDOT

Construction on I-405 Renton to Bellevue Widening and Express Toll Lanes expected to begin in 2020

Broomfield, Colorado (October 28, 2019) Flatiron has executed a Washington State Department of Transportation (WSDOT) contract for the $705M I-405, Renton to Bellevue Widening and Express Toll Lanes project. Flatiron West, Inc., a subsidiary of Flatiron Construction Corp. is the lead partner in a joint venture with The Lane Construction Corporation.

This project, the second I-405 project for Flatiron, will widen the highway and install dual express toll lanes between State Route 167 in Renton and NE 6th Street in Bellevue, Washington. 

WSDOT expects to issue its Notice to Proceed soon, with actual construction getting underway early next year. The project is expected to be completed by 2024.

“This project represents our continued commitment to improving infrastructure across Washington and to providing rewarding careers and job opportunities to the local community,” said Richard Grabinski, Executive Vice President and Deputy Chief Operating Officer.

Learn more about how Flatiron is transforming infrastructure at

About Flatiron Construction Corp.
Flatiron develops innovative solutions to build transportation and infrastructure projects across the U.S. and Canada, including roads, bridges, highways, rail transit, airports, dams, and water treatment and storage facilities for both public and private clients. Flatiron delivers projects through a variety of alternative delivery methods, including design-build, construction manager/general contractor, bid-build and public-private partnerships. To learn more, visit

MEDIA CONTACT: Mike Swenson / Phone: (720) 494-8118 /

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