Between Enumclaw and Buckley Washington, Point 317 in TheFraze's link above, is an abandoned state bridge in the woods. The arches and general design is similar to old bridges along the US 10 corridor that were bypassed with I-90. I approached it from the north on part of the Foothills Trail (former Northern Pacific Railway) that was petering out on the way to a missing crossing over the White River. The railroad corridor itself used to cross over the highway, but the area between the abutments had been filled in. I didn't see any "No trespassing" signs in the direction from the trail, but there is one from the direction of the street. I thought that the sign could be wrong and that this could still be a public corridor, but I checked the county property site and saw that the bridge is split lengthwise between the two adjacent residential property owners. Part of the base is becoming undermined. I hope it doesn't disappear, because it's a beauty.
Boisie Creek Bridge, south of Enumclaw by Arthur Allen, on Flickr
Your post is awesome for two different reasons. For one, you looked through my map of bridges in Washington (thank you!), and second, I have not had a chance to visit this bridge yet in my travels. So I am really glad that you have shared pictures of it.
I heard that the Boisie Creek Bridge was going to be used as part of the Foothills Trail, so I went out to take a look. This is from the opposite direction of the quoted photo. In the distance you can see the abutment for the railroad bridge that used to cross over the road that used the foreground bridge. The rail grade is being dug out to ramp down to the old road bridge, to turn south and then to cross the White River to Buckley on a new bridge. I never thought that would happen, but the new bridge can also be used for emergency vehicles when the SR 410 bridge is closed.
King County Parks trail update
