Comments on: 3 CN locomotives eastbound on the north track of Strathroy Sub mileage 7.3 at Pulham Road, near Lobo Siding in the rural west of London Ontario. The “73″ on the equipment hut was a good clue. There is a reasonable match with contemporary street-views; MP 7.4 signals seem to have been added. Leading was CN 9658 (GP40-2W), then CN 2034 (C630M) and CN 2111 (HR616). CN employees were on the scene for a derailment clean-up. After the engines cleared, the railcar wheel-set on the south track was pushed under a BN bulkhead flatcar, whose end had been hoisted by a road-mobile crane (both just out of the picture, to the right).

By: jp4pix

jp4pix — Thu, 11 Apr 2019 13:00:41 +0000

After scanning a lot more negatives, I have an update to the caption. The railcar without its front truck probably had it removed on purpose.
It was a very long bulkhead flat car that was loaded with car-length utility poles 5 layers high. Somehow they caught fire, lots of smoke! The train was halted with the car convenient to a grade crossing, and the train was cut. Fire fighters hosed water over the poles. A road crane unloaded the upper layers of poles – that railcar truck could have been removed for stability during unload.