CSX Borrowing short line boxcars again....

Well, on the MAJOR train this week, there were the usual CSX, and ex-CR, boxcars.... however, we have recentlly seen many short lines, such as:

>Golden Triangle
>Wisconsin Southern
> Hutchison Northen

do these just end up in the yard?

They are interchanged and shipped to wherever the commodity is destined. After the car is emptied by it's consignee, the car is routed back to the railroad to which the car belongs.