Expensive and complicated plans are underway to replace Interstate 5 bridges over the Nisqually River from Martin Road (Exit 111) to Mounts Road (Exit 116).
It's going to be a big hassle, but that work is going to have to happen sooner rather than later because a 1960s construction decision to save a buck effectively dammed the Nisqually River, not only hurting migration patterns of salmon and other wildlife but impacting protected tribal resources and hunting patterns as well.
As previously reported by The News Tribune, as rising sea levels and flash floods increase water flow under the bridges, I-5 is at risk of flooding as soon as 2040. Daily traffic volumes already exceed the highway's capacity during peak travel periods, including the weekend, and that's only expected to increase.
A highway shutdown along the West Coast's main north-south highway wouldn't just be a headache for drivers but could also result in a national security risk for neighboring Joint Base Lewis-McChord, according to previous News Tribune reporting.
So what's the state doing about it?
Planning is underway to restore the Nisqually River Delta and replace the bridges with larger ones that can accommodate more traffic, in addition to bikes and pedestrians. A National Environmental Policy Act Review Process began in July and is expected to be completed in spring 2026.
A formal 30-day comment period is now active through Sept. 12, where residents can provide feedback on potential bridge designs and lengths, potential environmental impacts and strategies to mitigate those impacts.
You can share your feedback online at https://engage.wsdot.wa.gov/i-5-nisqually/share-your-feedback/.
There will also be an in-person open house at the Lacey Community Center ( 6729 Pacific Ave. SE) Aug. 20 from 4:30-6:30 p.m., where you can ask the project team questions and provide comments.
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