05-02-2012, 03:33 AM
The Army Corps of Engineers did a study of adult chinook in the 1990's, using tracking devices, and discovered that it takes about 1 day for the fish to move through each of the upper 4 dams, and approx. 2 days to move from Lower Granite to the confluence in Lewiston. It took an average of 14 days to move from the lower Clearwater to the uppermost reaches of the Cl. drainage. These are averages, as the average time was up to 5. something on one of the years, dependant on water flows. An interesting side note: some of the salmon cross the dams, and are then blown back down. Most of these fish don't recross, but some do. Very few fish are blown over more than one dam. Hope this helps. Mike
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