Crews are demolishing the old 172nd St. NE bridge and replacing with a newer, wider bridge.
Thursday, April 28
8 p.m.: Crews will close the westbound lane of SR 531. They will place temporary striping and switch traffic from the old bridge to the north half of the new bridge. This north half will serve both eastbound and westbound traffic, which will give drivers one lane in each direction.
Friday, April 29
5 a.m.: All lanes of SR 531 reopen to traffic.
Saturday, April 30
11:30 p.m.: Crews have closed all lanes of northbound I-5 to demolish half of the old bridge. Traffic is being detoured up the 172nd Street NE off-ramp and back down the 172nd Street NE on-ramp.
Sunday, May 1
8:30 a.m.: Crews successfully complete bridge demoition and reopen all lanes of northbound I-5.