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Caption: The chart shows maximum daily water temperatures during summer of 1998 of the Mainstem Salmon River above, below and in Crapo Creek. Mainstem temperatures were critical in this reach from late July through mid September. Notice that although temperatures in Crapo Creek were considerably lower than in the Mainstem from July through September, Crapo Creek seemed to have little cooling influence on the Mainstem. Data were collected from automated temperature sensors called Hobotemps, which were anchored in flowing water in the shade, recording temperatures between May 26 and November 16, 1998. Hobotemps were monitored by students at Forks of Salmon School and paid staff of the Salmon River Restoration Council. Click on Picture* to see recent historical data and photographs of Hobotemp sites.
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