The Pacific Coast Air Line is a 4 x 8 railroad based on the On30 railroad trackplan in the "2002 Model Railroad Planning" by Kalmbach Publishing. The major feature of the On30 track plan was the adaptation of the loads in/out. The spur was set up as a rock quarry to a rock crusher like the rock crusher in the November/December 1957 Model Railroader.
We are once again pushing ahead with the On30 in 1905 concept. Areas are being upgraded. We are back to HO track, the handlaid track didn't look like the track we wanted.