Not sure I replied to this. But yes it is taken from White Salmon. I live in the town. And like you I have paddled down the White Salmon, on a sit on top, and yes it can be quite dangerous. Got sucked into one of the caverns at one point when I overturned, pushed off the wall and came up gulping for air-phew. Nearly bought a boat after taking some roll lessons but in the end bagged out since I was already and still am spending a lot of time kiteboarding and downwind Stand Up Paddle Boarding. Where did you live in Oregon-Oregon Tiger and where in the UK are you now?