Physical
The rapids are among the fiercest on the Fraser and are generally considered impassable to canoes and river-rafting expeditions and are formed by the narrowing of the Fraser's banks by rock ledges at this point. However the diversion of the Bridge River in 1958 with the Bridge River Power Project severely curtailed the flow of the Bridge River, and the combined flows of the river no longer produce the "fountain" of combined waters during spring freshet which led to the location's frontier-era name of the Lower Fountain.
(The Upper Fountain was a longer but equally difficult but not as narrow gauntlet of whitewater a few more miles upstream, below the community of Fountain, which was formerly known as the Upper Fountain; those rapids today are the Upper Fountain Rapids).
Read more about this topic: Bridge River Rapids
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