By Kathi O'Shea March 11, 2021 7:11 am WHATCOM COUNTY, Wash. — I-5 commuters in north Whatcom County may see some slowdowns today. WSDOT reports a planned left lane closure on I-5 North at Milepost 270 near Birch Bay Lynden Road today from 8 a.m. – 3:30 p.m. Crews will be doing some test drilling and need to determine soil type and ground water levels in the area in advance of future work. Featured Content