Steve-
According to your track alignment charts, Baker (MP13.72) to ALMOST Burgess Junction was "retired December, 1958 per AFE #70827". Possibly your 11/15/1958 date is the "Out-of-Service" date due to the trestle fire. I'm uncertain as to the meaning of "retired"; does that mean "dismantled"? Maybe Glen Haug can help us with that. I do know for a fact that the east switch of the north "leg" of the wye at Burgess Junction (MP 66.41 on 9th Subdivision) and approximately one mile northwest of that point was still in service as of 4/5/1969 when I made a student trip on the Fox River Wayfeight*. (That segment shows on your 1/25/1965 alignment chart.) We picked-up a box car of grain and spotted two empties at the elevator at end-of-track also known as Serena-Somonauk County Highway (IL 2). That grain elevator still exists today and can be seen on "googlemaps" of
that area.
(*- Engr. Benoit/Condr. Fredericks [FYI, Leo])
Bob Campbell in OK