The Elkhorn River originates in north-central Nebraska and empties into the Platte River just west of Omaha. One of the first written records of the Elkhorn describes a flood. A flood hindered travel up the river by the valley's first non-Indian settlers. Decade after decade, floods have swept away mill dams, destroyed crops, drowned stock, soaked inventories, filled basements, undercut roads, washed out railroads and bridges, turned unfortunate riverside...