Who knew how fast the gold mining industry moved from those romantic grizzled claim-jumpers to hydraulic operations that shot water from cannons at the mountainsides? The industrial operations washed millions of tons of tailings into the American, Feather, Stanilaus and Tulumne Rivers raising streambeds and causing floods of slick waste to spread across what had been river bottom lands in flood times. The Sacramento River flooded the town repeatedly as it and the American kept breaching levees which kept flood waters in, thereby freeing newly built redwood houses to smash against one another like driftwood in the tide. Lumber operations stripped the redwood belt to feed infratructure, timber mines, and replace canvas cities with boom town shanties. It's astonishing how far along this process of resource stripping and industrial exploitation had proceeded by the 1880s - a mere 40 years after Sutter discovered gold. The hydraulics of mining, the need for huge quanities of water to blast the gold bearing rock and sluice it down flumes are less known than the images of panners in the streams. And the mercury used to process the gold still lingers in the stream beds, leaving a toxic map of historical ecology tracing the watersheds of the Sierra Nevada. Engrossing historical reading of natural resources weaving together narratives that relates metals, timber, grasslands and water resources.