I-405 will close up to two southbound lanes from milepost 12 to Coal Creek Parkway Southeast from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4.
I-5 will reduce to a single lane nightly from 8 p.m. to 5 a.m. Monday, Aug. 31, through Friday, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction. Northbound I-5 will also close its left lane nightly from 8 p.m. to 5 a.m. Sunday, Aug. 30, through Friday, Sept. 4, north of North Lake Samish (exit 246).
State Route 20 will alternate traffic with flaggers daily (except weekends) from the Swin Slough Bridge (milepost 50) to Laconner Whitney Road/Bay View Road (milepost 53) for city Anacortes utilities work, beginning Aug. 21 until further notice.