For millennia, fresh water flowed into the Kissimmee River from as far north as Orlando, and then drained slowly south into the massive, shallow Lake Okeechobee. Clean water spilled over Okeechobee’s southern rim into large sloughs, such as Taylor Slough and Shark River, and innumerable small tidal creeks that trickled into Florida Bay. This is the famed “River of Grass” that delivered to Florida Bay a life-giving pulse of clean, fresh water each year. But this multifaceted ecosystem—fresh marsh and salt, brackish estuary, mangroves, saw grass, beds of sea grass, ribbons of reef—no longer functions naturally. The entire state has been replumbed with canals, reservoirs, channelized rivers, ditches, levees, dams, and pumps. Nowhere has this engineering had such a landscape-scale impact than in South Florida.