Link and the Rising Seas
Plausible sea level predictions do have implications for Sound Transit’s long range plan.
Sound Transit 1 and 2 rail lines will suffer little in the next hundred years or so, although the elevated Boeing Access Road section may become a causeway over water. Although Seattle is fortunate to find most of itself at elevation, Sound Transit 3 and beyond face serious constraints. Hopefully, Seattle will allow thriving, dense neighborhoods to grow around those stations; if those station areas are under immediate threat, the value of the entire alignment is doubtful....
South Sounder [and Amtrak Cascades between Seattle and Tacoma] looks to be in pretty good shape; coastal North Sounder [Cascades and Empire Builder between Seattle and Everett], not so much.