Helping Mother Nature Northern California's Sacramento River is one of this country's most beautiful waterways, and an important breeding site for the winter run Chinook salmon. It is also the site of an innovative program run by the U.S. Department of the Interior's Bureau of Reclamation designed to keep the salmon population healthy and growing. The hardy salmon thrive in colder water, but suffer ill effects when water temperatures rise above 56 ° F. The Sacramento River is fed from two lakes whose waters are warmed by radiational heating-Lake Shasta and Whiskey-town Lake. The flow of warmer water into the river was causing egg mortality among the spawning salmon and, in some instances, killing the salmon. But how could the Bureau of Reclamation possibly keep the warm lake waters from co

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