I-5 Marvin Rd to Mounts Rd Planning and Environmental Linkage

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This project began with a federal Planning and Environmental Linkages (PEL) study focused on I-5 from Marvin Road to Mounts Road. The National Environmental Policy Act (NEPA) environmental review will start in 2023. This next phase will study I-5 from Marvin Road to Mounts Road (Exit 111 to Exit 116). The PEL considered additional technical analyses and stakeholder input to arrive at a final purpose and need and preferred alternative(s), to advance into the National Environmental Policy Act (NEPA) environmental review. Funding is provided to accelerate work along I-5 through the Nisqually River Delta for preliminary engineering, design and right of way acquisition to address flood risk, improve mobility through the corridor between Mounts and Marvin Roads, and enhance the ecosystem at the I-5 Nisqually Delta crossing. Funding is also provided to construct three roundabouts on SR 507 as the only viable alternative to I-5. To subscribe to updates, click the link underneath the photo of the map and enter your email address when prompted. This page serves as the landing point for a potential future project. There is no construction planned at this time and traffic is not affected in this area.

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