The Platform

Your express stop for the latest Sound Transit news

Two trains passing north and south at Columbia City Station in Seattle.
Media Caption
First phase of work will replace platform tiles at Columbia City Station

Plan ahead for upcoming 1 Line maintenance

Work prepares system for smooth transition to 33 miles of new light rail extensions

Publish Date

(Editor's note: This post will be updated periodically to reflect the latest work schedules)

Getting ready for the 33 miles of Link extensions coming over the next three years involves a lot more than just construction on the extensions.

It also means making sure that our existing operations are in top condition as we prepare to tie the new extensions into our current one.

This work is getting us ready for the future, which is why we’re calling it Future Ready.

Starting in July through early 2023, we’re going to have a series of construction and maintenance activities that will help us prepare for the transformative changes ahead.

But these Future Ready activities mean that passengers will need to prepare for intermittent periods of less frequent service and replacement bus service when available.

Platform work Aug. 19 - Sept. 1. 

The next two-week period of construction on the southbound platform at Columbia City will happen Aug. 19 - Sept. 1. 

One side of the tracks through Seattle's Rainier Valley will close for two weeks to enable this work .

The work involves removing cracked and failing platform tiles and rebuilding a concrete base to ensure new tiles offer good durability, eliminating tripping hazards and safety risks from cracking tiles.

The bulk of the work is at the edge of the platform. For the safety of the workers, the tracks nearest that section of the platform have to be closed.

October maintenance between Rainier Beach and Tukwila

The next project will take place over five days in mid-October and impact travel between Rainier Beach and Tukwila Intl. Blvd. stations, as we repair the overhead catenary system.

Service between those two stations will be suspended and travelers will need to transfer to a free Link bus shuttle during the closure. Please allow for extra time in order to reach your destination, especially when going to the airport..

Here are dates and details for the first two phases of the Future Ready projects, as well as what to expect with later work.

We will post updates and rider alerts that include specific dates and durations for those projects as details are finalized.

Time period Travel Impact

Friday Aug. 19 - Thursday Sept. 1 

1 Line train frequencies will be reduced to 20 minutes between Angle Lake and Stadium stations. The work requires the closure of one track at Columbia City Station, forcing all trains to use a single track between Mount Baker and Othello stations. 

Trains will run approximately every 10 minutes between Northgate and Stadium stations from 6 a.m. to 10 p.m. During these hours every other train heading south from Northgate will turn back at Stadium Station. The trains exterior signs will say if they are headed to SeaTac/Angle Lake or Stadium.

From 5 - 6 a.m. and from 10 p.m. - 1 a.m. trains will run every 20 minutes systemwide. No southbound trains will turn back at Stadium Station. 


Mid October


In order to repair and replace the overhead catenary system, Link will be shut down between Rainier Beach and Tukwila International Blvd. stations with a Link bus shuttle connecting passengers between these two stations. Link will operate every 10 minutes between 6 a.m. - 10 p.m. between Northgate and Rainier Beach and between Angle Lake and Tukwila stations. Trains will run every 15 minutes before 6 a.m. and after 10 p.m. 

Friday, Nov. 11 to Sunday, Nov. 13

Free bus shuttles replace 1 Line service between Capitol Hill and SODO stations for overhead power systems work in the Downtown Seattle Transit Tunnel. Buses will serve all stations and run every 10 minutes. Link will operate between Angle Lake and SODO stations every 10 minutes between 6 a.m. - 10 p.m. and every 15 minutes before 6 a.m. and after 10 p.m.

A period of at least three weeks in Q4 2022

Trains will be single tracked through the DSTT and train frequencies will be reduced to 20 minutes.
Q1 2023 This work is needed to complete connections between the current 1-Line service and new 2-Line tracks that will link riders to the Eastside. Impacts are still to be determined.

To get the latest information about these service disruptions, make sure you sign up for Rider Alerts.

Doing this work now means we will impact far fewer riders now than if we delayed them until after further expansions open.

While the disruptions that this work will cause are unavoidable, we will work hard to minimize the impact on service to our riders. The end result will be a safe and improved system ready for our next phase of growth.

Back to The Platform