On August 22, 1990, the rear portion of an eastbound train derailed on Canadian National’s now decommissioned Kinghorn Subdivision at the Namewaminikan River Bridge, Milepost 44.4. Numerous cars and the caboose left the rails, with several cars coming to rest in the river. Part of the bridge and an unknown length of the track were damaged, which took 3 days to repair. The video was shot on August 22nd and 24th. The cause of the derailment was due to thermal misalignment, more commonly referred to as “heat kink.”
Video courtesy of M. Darling.
Poverty, Agony, Distress & Want! 
Jean
December 12, 2023 at 13:56
What was in the cars that derailed?
Padwrr
December 12, 2023 at 14:07
Wood and paper I believe. If you look closely at the 2:43 mark of the video you’ll see what appears to be plywood in the water beside a boxcar.
Jean
December 12, 2023 at 16:37
I did see the plywood. MOE would have been all over it. What a mess!
Padwrr
December 12, 2023 at 17:42
It could have been much worse. While some details are known, I am awaiting a copy of the incident report which unfortunately is not digitized and has to be obtained via an Access to Information request, which is taking months to complete.
Jean
December 12, 2023 at 18:41
Thanks Dave.