A river lost

This is a book about how well-intentioned Americans dammed up the Columbia, "Great River of the West," fulfilling dreams of cheap electricity and gardens flourishing in the desert. It is also a narrative of exploitation: of Native Americans, of endangered salmon, of nuclear waste, and of a river - once wild - tamed to puddled remains. Harden's story is a journey of rediscovery. His home town, Moses Lake, Washington, once bone dry, could not have existed without gargantuan irrigation schemes. His father, a Depression migrant trained as a welder, helped build dams - including Grand Coulee - and…