The answer to the question above is:  It was a trick question!  The plant is located in the industrial park (upper left) on the J & P Railroad (J.C. & Patty) and is the passion of our own J.C. Miller, C.F.O!  Additionally, this HO scale model set  boasts a complete town (Pattyville-bottom center) with infrastructure, utilities, mountains, valleys,  a farm, and a rail yard with switch.  The industrial park also contains a Manatts Ready Mix Plant and an Oil Tank Farm.