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Alert now-Spring 2024: I-90 Trail detour in Factoria

Screenshot of a tweet from WSDOT with a map of the closure and text: Bicycle Emoji, Long-term closure of the Mountains to Sound Trail in Bellevue starts Monday and will last into spring 2024. Between 132nd Ave SE and just east of Sunset Ravine. Signed detour uses sidewalks along SE 36th Street. Work is par of I-90 Sunset Creek fish passage.
The alert from WSDOT.

Well, I hope you enjoyed that new section of the I-90 Trail in Factoria, because a section of it will be detoured to the other side of SE 36th Street until Spring 2024.

As part of work on the really cool I-90 Sunset Creek Fish Passage project, crews will be detouring the I-90 Trail between the existing crosswalks at 132nd Ave SE and the crosswalk near the Kaiser Permanente Factoria Medical Center. That’s not so cool. There is skinny painted bike lane on 36th in the eastbound (uphill) direction, but westbound riders will have to choose between riding with mixed traffic or riding on the sidewalk, neither of which are great options. The official signed detour will direct riders to the sidewalk. SE 36th Street will also be reduced to “a single-lane of alternating traffic” at some point, so it’s unclear how bike-friendly the on-street options will be.

News of the Monday detour came as a surprise when WSDOT sent out their hand-drawn map in a tweet 6 p.m. Friday evening. That was the first I had heard about the project having an impact on the trail, and the project website does not mention the trail anywhere. I am on every imaginable local transportation email list, and a search showed that this trail impact was never sent out to any of them. I did find 2 emails mentioning the Sunset Creek project, but neither mentioned an impact to biking or the trail. It seems like the trail detour was either forgotten or ignored, which is frustrating. This is a major regional trail, and it really should not be treated as an afterthought like this.


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Concept overhead graphic of the planned Sunset Creek passing under the roads and freeway. The trail is not pictured.
This concept graphic from the project website does not show the I-90 Trail.

The fish passage project itself, though, is really cool. Many year ago, WSDOT put Sunset Creek into dingy culverts that fish in the creek cannot travel through because they are elevated at points and too shallow. It’s amazing that freeway engineers of the past through they could do this to a stream and it would be fine, but then again they didn’t treat the communities they were bulldozing any nicer.

Two images of culverts carrying the creek today, one of which is elevated above the water level. The second image shows three culverts emptying out near each other with text, Fish that do manage to get into the culvert will encounter a maze of three pipes.

Now the state is investing $117 million to make the creek passable for fish again. The four-year project also includes a six-month closure of SE Eastgate Way on the opposite side of I-90.



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5 responses to “Alert now-Spring 2024: I-90 Trail detour in Factoria”

  1. Nathan M

    I just saw the crews parked in the uphill bike lane just east of TMO campus today. The cars on this road want to drive 50 and it’s pretty white knuckle riding that section if you have to use the painted bike lanes.

    1. Jeff

      They park there a lot and are kind of snippy about it. The guys who park in the eastrail corridor are much nicer about parking to one side so you can get by.

  2. asdf2

    “SE 36th Street will also be reduced to a single-lane of alternating traffic at some point”

    With luck, maybe that means drivers will be forced to slow to bicycle-level speeds for the construction crews, in which case even mixed traffic starts to become a relatively safe option. Can’t count on that, though.

  3. Mark

    I had an SUV driver road rage at me this morning for going 30mph down the hill on SE 36th, yelling that I should be on the bike trail (that is closed). He came within inches of hitting me. What am I supposed to do?

    1. J

      At this point I wish we had the old layout back. It had wide shoulders. There’s nowhere to go now and those lanes are skinny.

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