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SR 18 Widening and Freeway Conversion between Issaquah-Hobart Rd and I-90

Started by stevashe, July 17, 2026, 01:54:41 PM

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stevashe

With the initial DDI project at I-90 wrapping up this year and final design underway on the remaining gap between Deep Creek and Hobart, I figured it was a good time to start a proper thread for this. (I also have some pictures that I've been procrastinating posting, see below...)

Once both projects are complete, SR 18 will finally be a complete freeway from end to end (albeit with a RIRO for trailhead access at Tiger Mountain Summit).

WSDOT Project Pages For both projects:

Pictures of the (mostly) completed segment from Deep Creek to I-90 I took last fall. I think the new freeway turned out nicely! It's a bit  surreal to see this finally completed. Pictures are all in order, and all taken driving EB towards I-90, except the last pciture which is WB.


SR 18 Deep Creek to I-90 (1) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (2) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (3) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (4) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (5) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (6) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (7) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (8) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (9) by Steven Ashe, on Flickr


SR 18 Deep Creek to I-90 (10) by Steven Ashe, on Flickr