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New Traffic Configuration of SR 99 and Mercer Street Now in Effect
SR 99 and Mercer street are open again after a weekend closure to complete work as part of the West Phase of the Mercer Corridor project. The closure was in preparation for demolishing the east half of the SR 99 bridge over Mercer Street and widening Mercer Street between Fifth Avenue North and Dexter Avenue North.
A new configuration of SR 99 and Mercer Street is now in effect and travelers can expect the following changes to the corridor:
Mercer Street reduced to two eastbound … more
Program Spotlight
Launch pit complete, ready for Bertha
Last spring, a field of unturned dirt marked the spot where Bertha will begin digging the two-mile State Route 99 tunnel beneath downtown Seattle. One year and 86,000 cubic yards of soil later, it’s a pit fit for the world’s largest tunneling machine.
Crews finished building Bertha’s 80-foot-deep launch pit on Sunday after nearly a year spent building its underground walls, removing soil and building the infrastructure needed to support the nearly 7,000-ton machine. Its … more
