Earl's Quote:
"Timetables through the 1950's show it was permissible to doublehead using a 470. In the the 1960's all doubleheading was banned. Further instructions stated that the engines had to be seperated by 100' of empty or lightly loaded equipment, which would keep the engines from being on the same span at the same time."
There was clearly 100' of empty or lightly loaded equipment between 487 and 484, so the engines were not on the same span of the bridge at the same time, but the way I read the rule, it is for 470 class engines. These were 480's. Perhaps I am nit-picking. Any way thanks for posting the video.