This is a fascinating map. How much of this trackage was still in place in the late 1960's? A retired co-worker of mine, off the MoPac, said that he borrowed out on the Frisco during that time frame, working in the general area indicated on this map. He said it was a mine run and was a real killer, especially with the 16 hour hog law. Does anyone have any info on the job assignments in this area?