We’re finally here: ST3 Planning level 3 is where we cut everything but two options and send those on for an environmental impact study. Those options will include a high end options that relies on local funding an an affordable option that doesn’t. At this point, our primary concern is with the low end options. There is a conversation to be had in the future about whether spending $1.9B on high end ST3 options makes sense and where the money will come from, but that’s a topic for another day.
Though we’ve heard ST staff say many times that the options are mix and match, we don’t get the impression they mean it when it comes to the Ballard station location. As we (and others) have said many times a 14th NW station and a drawbridge are both unacceptable. A drawbridge is an unacceptable reliability compromise for the future or our system. A station on 14th NW simply doesn’t serve riders west of 15th or transfers well. A station on 15th NW with entrances on both sides of the street does.
A 14th high bridge crossing with a station on 15th is our minimal expectation for an affordable option. While it’s not impossible to see local funding via the port come through for a tunnel to Ballard, as the current options stand, the 15th Ave NW tunnel station the only option we can support.
The railroad stations and 4th Avenue viaduct from above. Credit: Bruce Englehardt
On Monday, the Sound Transit West Seattle and Ballard Link stakeholder advisory group, which includes transit advocates, prominent community members, and business and labor leaders, moved further along the process of selecting alignments and station locations for the West Seattle and Ballard light rail lines.
The advisory group will eventually pass recommendations to a subcommittee of the Sound Transit board, which in turn will recommend the ultimate preferred alternative to the board as a whole.
A breakout group at work. Credit: Peter Johnson
In breakout sessions conducted over pad thai, the advisory group discussed the alignment and station locations of the new West Seattle line’s Sodo station. The advisory group also discussed the location of the new Chinatown/ID station, which will have far-reaching impacts on the future of the light rail system.
The Chinatown station, and the segment of the new line closest to it, was the subject of intense discussion, with good reason. It’s the centerpiece of the project, and it could have the most disruptive construction impacts of any Link project so far.
Tough choices for Chinatown/ID station and alignment
Concept map of the alignments. Credit: Sound Transit
The future Chinatown station is one of the most critical elements of the new Link line. It will be the southern terminus of the new downtown tunnel, the site of hundreds of thousands of intra-Link transfers every day, and the light rail network’s busiest multimodal hub, with connections to Sounder, Amtrak, public and private buses, and the Seattle streetcar.
The station and alignment’s siting and design will have permanent impact on Link’s capacity, headways, and expansion potential. Sound Transit is committed to making the Chinatown station a central transfer hub, so it has to be built adjacent to the existing Chinatown/International District Link stop next to Union Station.
Construction in Chinatown and Pioneer Square is complicated. Much of the area is infilled tideland, which would liquefy during an earthquake. Liquefaction aside, the loose soil requires deep foundations for newer construction, and would force Sound Transit to make a deep bore tunnel even deeper than in most areas of the city.
Plus, many of the buildings in the area are built on pilings, since the neighborhoods are the city’s oldest. Those pilings could be obstacles for any alignment, and might not be replaceable with a new foundation. Demolition isn’t a way out of that problem: a large slice of the area—and King Street and Union Station themselves—are historic landmarks, or in historic districts.
4th Avenue vs. 5th Avenue
Sound Transit’s “representative alignment” is under 5th Avenue, with a station perpendicular to King and Jackson streets and parallel to the current Chinatown/ID station. During the first round of outreach with the Chinatown and Pioneer Square neighborhoods, there was strong demand for siting the line and station on 4th Avenue, or under Union Station. Continue reading “Link Advisory Group Reviews Chinatown, Sodo, Water Crossing Issues”
