Bob, this car is a great find and by clicking on the picture and moving the picture around,  it appears that CNO&TP 1308, a ventilated boxcar is being repaired and between it and CNO&TP 1121, stringers are being prepared to build an underframe.

https://exploreuk.uky.edu/catalog/xt7sf7664q86_5878_1

Gary Laakso

Northwest of Mike Brock