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At Monticello the KCS interchanged the loaded cars for empties with the Tugco railroad. The Texas Utilities Monticello Steam Electric Plant used mostly locally mined lignite plus one trainload of lignite from Thermo. The power plant used Texas lignite exclusively until the mid80's when it began to sample PRB coal. I returned seven years later on December 5, 1986 but the F units were gone. By that time I caught up with the Tidewater Turn it was already at Monticello. KCS engines 760, 765, 756, 778, and 749 have just set out the loads and are moving to the other end of the siding to pick up the empties.
Once clear of the west switch at Monticello, the brakeman shifts the switch and the units back over to the electrified trackage of Tugco. The electrified system was not designed for tall cars, but auto racks will clear the wires and KCS occasionally used Montecello for meets. Disk 95