Light rail work to close northbound I-5 in Mountlake Terrace

The overnight closures will happen late Friday, Saturday and Sunday.

MOUNTLAKE TERRACE — Northbound lanes of I-5 are to be closed overnight this weekend for light rail work.

Crews working on the Lynnwood Link extension are scheduled to close the lanes of I-5 from Highway 104 to 220th Street SW in Mountlake Terrace for several hours at a time, starting late Friday.

The planned hours for the closures are:

• 11 p.m. Friday through 6 a.m. Saturday;

• 11 p.m. Saturday through 6:30 a.m. Sunday;

• And 11 p.m. Sunday through 4:30 a.m. Monday.

The closure lets them build falsework for span supports across I-5 in Mountlake Terrace for the Sound Transit light rail alignment to cross over the highway. Falsework is a temporary steel column system between and outside the girders used to support the construction of the concrete deck, on top of which the light rail trains will travel.

Crews might reroute northbound I-5 traffic to Highway 99 and 220th Street SW.

I-5 southbound lanes will remain open.

The freeway station at Mountlake Terrace Transit Center will close at 11 p.m. Friday through 4:30 a.m. on Monday. Route 512 bus riders can board at Bay No. 3 on 236th Street SW.

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