In 2008 BLMA came out with a brass 4 section thru truss bridge model. I felt this would be a good match for the WP bridge that is just west of the two palisade bridges so I picked up one. This is a beautiful bridge with great detail and set my expectations high for any additional bridges. At about $200.00 for one bridge, that was going to get expensive even if they could be found. I wished there was a plastic kit bridge that had the same great detail and that could possibly be modified to match particular bridges on this layout.
Central Valley then released their model 1815 bridge with portals that were a good match for the SP bridge at Palisade. This one was also shortened to 3 sections to match the prototype. Great, now I had good models of all 3 bridges west of the Palisade tunnels.
There are still more bridges to build or collect for this layout and this effort is continuing.