Originally Posted by johnovice
We also filled at Rock Ck (half way) based on resounding advice here on the Buzz; used a gravity filter to treat. I was JUST talking to someone here who said water that does not need to be treated can be found on river left at the site of an old attempt at a "resort" on the reservation, also some old cabins. He said you can find a 1 1/2 to 2" pipe putting out lots of good water. Maybe some others here can chime in with a better description (there also was a thread about this maybe 3 weeks ago, so you could try a search).
We call it "creepy motel" though its been cleaned up in the last few years. Its the old McPherson Ranch I believe. Just below Joe Hutch rapid and an easy landing.
The resort operated for a while from what I understand. I think you use to be able to buy ice and ice-cream there through the 80s. They have put in a new roof and have ongoing talks about restarting a business there.
I treat all water on the river out of concern of human contamination. That ranch site has a long history of human use and I would not trust it to be a clean source myself. That said, I would doubt it has a natural source of contamination. Mileage will vary. For me, an occasional purchase of a filter just gives me peace of mind with heavily trafficked locals.