We saw a Whitefish on the Bow near Carsland, with what was likely Whirling disease, in 2010. It swam down the river on the surface, right next to our anchored boat. We tried to scoop him up with the long handled boat net but missed him. His spine/tail was bent in the classic WD shape.
There are hardly any RM Whitefish left in the Bow these days.