You can see a curved crossover in the lower part of this photo. The one with the flashlight shining on it is the one I finally just installed at the very south end of the layout, south of Argo yard. Let's unpack this photo and all these tracks. From bottom to top, in the street are the tracks to Lonestar Cement and the South Seattle Intermodal Terminal (truck trailers strewn all over for the installation of the turnout). Above that is what looks like a double track curved mainline with a (new, the subject of this post!) crossover in the middle of it. But appearances can be deceiving - the closer track to the right curves around in a reverse loop that eventually becomes the "Colorado Main" leading back to the Stacy St. yard. The farther mainline track heads into the hidden staging yard of 7 tracks representing Tacoma and Portland off the layout to the south. Heading off to the left, the nearer track is "Main 1" leading to Stacy St. yard, Seattle and northward, and the farther main track is "Main 2" which has the lead to the Argo yard and parallels Main 1 around the layout to the left (north) as far as Mukilteo.
Above Main 1 and Main 2 is the mainline between Everett and Mount Vernon to the north. Above that in the shadows is the Woodinville Branch (I forgot to turn its lights on, oops.). Above that, on the upper border of the photo, is the edge of the Skykomish staging yard, at the far easternmost point on the layout.
Well, I had to install this crossover once we built the "Black River Jct. yard" above Harbor Island (Legotown) because we needed to connect Argo yard to the reverse loop, in order to run trains "south" from Argo to BRJ. I procrastinated on this for months, if not years, but now it's done. Hurrah!
The next two pictures show track-level views of the crossover during glueing. I pin down the tracks and then drip liquid latex diluted 3:1 with water for attaching tracks. Then later when I put down ballast, the water-based white glue doesn't unglue the latex, which has dried by that time and is impervious to water. That's the good news. The bad news is that I've found that liquid latex deteriorates after 20 years or so (just like a rubber band does) so there are places I have had to re-do over time. I usually put weights on the track during glueing, too, but for some reason I hadn't done this when I took these photos.
So, here is a photo of the track with the weights on it...
And, finally, here is the new crossover after it passed the testing phase, with the trailers back in place and everything ready to go. (In case you were wondering, those white triangles are markers we use for measuring the length of trains entering each of the hidden staging tracks in the Tacoma staging yard off to the right.) It doesn't seem like much, but this crossover is an important key to the future operation of Argo yard, the Lonestar Cement switching area, and the new Black River Jct. yard. It's great to finally have it in operation!