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Grande Ronde volcano
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U.S. Fish and Wildlife Service
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Subject
Hells Canyon (Idaho and Or.)
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Water temperature -- Hells Canyon (Idaho and Or.)
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The mail boat trip was taken from Lewiston to Hells Canyon and return. Bathythermograph observations were made in deep holes at Buffalo Eddy, Nez Perce Dam site, and near Mountain Sheep Dam site. Thermograph ...
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