In a powerful work of environmental history, Martin Doyle tells the epic story of America and its rivers, from the U.S. Constitution's roots in interstate river navigation, to the failure of the levees in Hurricane Katrina and the water wars in the west. Through his own travels and his encounters with experts all over the country--a Mississippi River tugboat captain, an Erie Canal lock operator, a project manager buying water rights for farms along the Colorado River--Doyle reveals the central role rivers have played in American history and how vital they are to its future.