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You were correct that they were salmon. There are kokanee and Chinook salmon in lake CDA and they do get swept down stream to the lower Spokane river and to lake Roosevelt during high runoff years. Both populations seem to quite well in CDA and I would like to see them try to introduce the land locked Chinook in lake Roosevelt . As to the weirs I have know idea why IDFG would do that. I heard they are looking into starting programs to reduce the number of pike to ensure the native Kokanee spawn.