Crews are preparing to install a drilled shaft east of the temporary work bridge, and near the new floating bridge, for the new West Approach Bridge North (WABN). There will be an upcoming, temporary change to marine navigation on Lake Washington.
In consultation with the U.S. Coast Guard, the temporary west navigation channel will be closed for approximately two weeks from Monday, Jan. 4 to Monday, Jan. 18. During the closure of the west navigation channel, the east navigational channel will remain open and accessible with the temporarily reduced navigational height of 58 feet. An illustration of the new temporary west navigation channel is attached and is posted on the SR 520 Boater Information Web page.
Crews will work as quickly as possible to install the drilled shaft. If they complete installation in less than two weeks, they will open the west navigation channel early and more information will be posted to inform you of the early opening. When the west navigation channel reopens, it will reopen to the temporarily narrowed configuration that has been in place since October 2015.
Crews on the WABN project expect to close the west navigation channel again in late January or early February 2016 to install the second drilled shaft east of the temporary work bridge. Prior to that closure, more details will be made available. Updates will be posted on the SR 520 Boater Information Web page.
Please continue to check the SR 520 Boater Information Web page for the most up-to-date information regarding navigational changes around SR 520 on Lake Washington.
If you have any questions about navigating around construction, please call the 24-hour hotline – (206) 708-4657.