The U.S. Army Corps of Engineers’ $14.6-billion drive to bring New Orleans’ hurricane defenses to 100-year levels of protection by June 2011 could fundamentally change the way U.S. civil-works projects are funded and delivered, project leaders say. + Image + Image The Greater New Orleans Hurricane and Storm Damage Risk Reduction System, or HSDRRS, is the largest civil-works construction program in Corps history. It was launched in the aftermath of Hurricanes Katrina and Rita in 2005. Already, on the fifth anniversary of the Hurricane Katrina disaster and with a year’s construction yet to go, the works now in place provide
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.