Nice pictures. I think the only reason they venture down 1st ave is Sims, do they recieve that type of gondola?
Last I checked SIMS is the only customer up 1st ave. They get NS gons for metal recycling. A few possibilities for the CDEX car: sims testing it in place of the NS gons, or maybe they'll be used for plastics or glass assuming a buyer with rail access has come along.
Unless of course someone is loading c&d now somewhere along the line.
I wonder what ever happened to that plan to ferry over autoracks and unload them at the lot just south of SIMS...