Westbound I-90 floating bridge shut down due to high winds, waves

SEATTLE — The westbound lanes of the Interstate 90 floating bridge are temporarily shut down Sunday afternoon due to high winds and waves.

“If we hit a new threshold of sustained winds from the north of at least 25 mph for two minutes and observe waves of at least 2 feet, we will not allow traffic onto the westbound I-90 bridge between Mercer Island and Seattle,” the WSDOT wrote Saturday. “Wind and wave analyses performed during Sound Transit’s East Link design process showed the pontoons on the westbound I-90 bridge are susceptible to damage during strong north wind events.”

The closure caused a 2-mile traffic backup Sunday afternoon. WSDOT says drivers should use alternate routes such as Interstate 405 or state Routes 520 and 522.

The eastbound lanes of the I-90 bridge remain open.

There is currently no estimated time that the westbound lanes will be reopen.

High winds caused power outages around the region on Sunday.

In Snohomish County, there were about 15,000 customers without power Sunday afternoon, according to Snohomish County PUD.

About 4,100 were without power in Burien, Seattle City Light says. The cause for the outage is under investigation.

Throughout the day, Orcas Island also had outages due to downed trees and winds.

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