The U.S. Army Corps of Engineers is using a variety of measures, including opening three massive river diversion features—the Bonnet Carré, Birds Point-New Madrid and Morganza floodways—to relieve pressure on the Mississippi River watershed. Graphic: Courtesy USACE Water spewed skyward at the rate of 10,000 cu ft per second on May 14 as the first vertical-lift gate was opened on the Morganza Floodway. It was the Corps’ third big control measure in the flood fight and marked the first time that three main control structures on the lower Mississippi were opened at the same time. The Corps’ first move was
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.