On Nov. 26, 2013, SR 520 bridge construction crews launched a 660-ton coffer cell onto Lake Washington. This coffer cell will be used to create a dry work space so that crews can complete repairs to the end walls of Pontoon U and Pontoon V on Lake Washington. For more information, visit: www.wsdot.wa.gov/projects/sr520bridge
–wsdot on YouTube
Tags: Lake Washington, Pontoon Bridge, Video, WA, Washington, Washington State Department of Transportation, WSDOT, YouTube