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Contractor Information

Pontoon quick facts:

Construction bid amount: $367.3 million

Engineer’s estimate
: $547.4 million

Number of pontoons
: 33

Pontoon facility construction completed: Fall 2011 

First pontoons constructed
: 2012


A steel worker uses precision instruments to create a clean cut on a recently driven bottom pile. See more photos of the work.

Kiewit-General Joint Venture started work at the Pontoon Construction Project site in Aberdeen in February 2011. 

WSDOT expects the Pontoon Construction Project to support local job creation for construction, supplies and supporting services. 

Kiewit-General Joint Venture hires the workforce, vendors and sub-contractors for the project. Visit the SR 520 Contracting and Job Information Web page for additional information about SR 520 program job and contracting opportunities.

The project includes the following work:

  • Designing and building a new pontoon construction facility in Grays Harbor County.
  • Designing and constructing 33 new floating bridge pontoons.  

The Kiewit-General Joint Venture bid price of $367.3 million was $180 million less than the state engineer’s estimate for the project. The contractor team had the best combination of bid price and technical score, which reflected several factors including proposed plans for a pontoon construction facility, how quickly new pontoons could be built and environmental protections. Three teams competed for the contract.

Kiewit-General Joint Venture completed the SR 104 Hood Canal floating bridge east-half replacement and west-half retrofit project for WSDOT in 2010.

The Pontoon Construction Project is part of the SR 520 Bridge Replacement and HOV Program to build a new, safer SR 520 floating bridge across Lake Washington.