Twenty years after Congress mandated improved water flow in the Everglades, a federal judge has removed a major obstacle to accomplishing that goal: Judge Ursula Ungaro of the Florida Southern District Court in Miami lifted her injunction on elevating one mile of U.S. Rte. 41, the Tamiami Trail. Construction of the highway in the early 1920s blocked the sheetflow of water across the ecosystem, precipitating a long-term decline of the Everglades. The Interior Dept. last year made the project a top priority. But in November, the Miccosukee Tribe won the injunction, claiming that Army Corps of Engineers’ failure to perform
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.