STATE ENVIRONMENTAL POLICY ACT Determination of Non-Significance (DNS) Project Title: Interstate 5 (I-5) / Northbound Marine View Drive to State Route (SR) 529 –Corridor and Interchange Improvements Project. Description of Proposal: The State Route (SR) 542 Glacier Creek Bridge Chronic Environmental Deficiency (CED) project would design and construct a new floodplain-spanning, 880-foot-long bridge over Glacier Creek. The bridge would be continuous with a recently constructed adjacent bridge over Gallup Creek, span the floodplain and alluvial fan, and eliminate 350 feet of vulnerable bridge approach fill between the two structures. Proponent: Washington State Department of Transportation (WSDOT) Location of proposal: The project is located between milepost (MP) 33.31 and 33.67 on SR 542 in the town of Glacier in Whatcom County, Washington within Sections 05, 06, 07, and 08 Township 39N Range 07E. Lead Agency: WSDOT The lead agency has determined this proposal does not have a significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed SEPA environmental checklist and supporting documents on file with the lead agency. This information is available to the public on request. This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 30 days from the date of issuance. Comments must be submitted by 3/4/2026. Please submit comments to Joëlle Cihak by email at joelle.cihak@wsdot.wa.gov or to the below P.O. Box. Responsible Official: Eliza McGovern Position/Title: Northwest Region Environmental Program Manager Address: P.O. Box 330310, Seattle, WA 98133-9710 Phone: (360) 584-5073 IPL0309718 Feb 2 2026