That is essentially correct Benny, although the trips to Bainbridge varied according to how much coal the mines were loading, or how many empties were available. Back in those days we referred to them as "single car mines" although in reality the mines may have loaded several dozen cars every day. The loads were always weighed at Midland before leaving there. The scales, which were longer than a hopper, sat at the top of a little rise in the track on the yard lead, and after each car was weighed, it was cut off and allowed to roll down into the yards. Kind of a mini-hump yard.
The term we used for the Friday trip from Bainbridge to McDoel was "running caboose light" or "cab light" as opposed to simply "running light" when we had only the engine consist. / Ron