A long-standing, but unfunded desire to restore Louisiana’s barrier islands may be fulfilled if British Petroleum agrees to foot the bill for a proposal to dredge and build up long-eroded islands to stop oil from encroaching on sensitive marshlands. The Chandeleur Islands near the mouth of the Mississippi may be nourished with dredge spoil to shield wetlands from the oil spill spreading in the Gulf. “Right now, it’s just talk, in the infant stages,” says Chris Accardo, chief of operations division for the New Orleans District, U.S. Army Corps of Engineers. The Corps would have to issue a permit for
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.