A federal judge in New Orleans ruled on March 20 that a civil lawsuit against the U.S. Army Corps of Engineers brought by homeowners who suffered flood damage in Hurricane Katrina in 2005 can proceed. The suit claims the Corps is liable for levee failures along the Mississippi River to Gulf Outlet, a navigation channel. The Corps has immunity from claims arising from flood-control failures but does not have the same protection with respect to navigation infrastructure. Judge Stanwood J. Duval Jr. said “substantial questions” have been raised. Damages could reach $100 billion.
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.