The Canadian Pacific Railway used to use these Barges to transport their trains along the length of the Slocan Lake. During a sudden storm the barges and train were cut adrift and we often visit the wreckage across from Silverton. I'm still working on this story but there is a report of train #3512 falling off a barge in Slocan Lake on 31 December 1946. According to Wikipedia the Iris G tug boat and a barge were operated under contract to CP Rail until the last train ran late in December 1988. There is some more history here.