Here’s more of how it went together. I was particularly proud of the tiny little support column that was used originally when the tunnel was blasted out (before it was sleeved). Afterwards, they poured the sleeve around half of it. Since my model had the sleeving, I only made the column to half width.
The blasting ‘daylighted’ part of the third tunnel so that you can see over to the other side of the river. Because of this, I ended up doing scenery behind it so that when you looked into the viewing portal, you’d see the sleeve and then through the open parts of it to the scenery behind it. Really liked the effect.
Everything here was fashioned from foam, painted with flat white acrylic, and then ‘painted’/stained with WS pigments.
Unfortunately after assembly it became clear the portal I had made for viewing purposes did not show off any of the concrete work I’d hoped to have visible. I ended up having to cut out a chunk of the concrete sleeving on one side (where you see the columns supported by horizontal beams near the floor). Oh well. 🙂