Viaduct closed two of next three weekends

The Alaskan Way Viaduct is closed this weekend until 5 a.m. Monday for routine maintenance and preparing for the future tunnel that will replace the structure. The road is closed from the Battery Street Tunnel to the West Seattle Bridge.

In addition to structural inspections and routine maintenance, crews building the SR 99 tunnel will begin reinforcing the viaduct between South Washington and Columbia streets in Pioneer Square. An additional full-weekend closure in April will be necessary to complete their work, which must occur before the world’s largest diameter tunnel boring machine passes beneath the structure in late 2013.

The additional weekend closure is Friday, April 6 (11 p.m.) to Monday, April 9 (5 a.m.)

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