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SR 520/I-405 Vicinity - Seismic Retrofit - Photos

looking west at SR 520 near I-405
Much of SR 520 east of I-405 consists of bridges over city streets.  Crews strengthened the supports of these bridges so they can withstand catastrophic earthquakes.

SR 520 bridge over Northup Way
Crew placed steel jackets on the SR 520 bridge columns at Northup Way.

SR 520 bridge over 124th on ramp
Crews strengthened the SR 520 bridges over the westbound SR 520 on-ramp by installing steel jackets on the columns and concrete bolsters on the crossbeams.

Crews installed concrete bolsters on the crossbeams of the SR 520 bridges over
130th Avenue NE.