If another Hurricane Katrina-like disaster hits New Orleans, the city’s water and sewer board will now have a hazard-mitigation plan to ensure that local environmental infrastructure can get state and federal emergency repair funds. “Probably a lot of other cities don’t have this because they haven’t had the disaster,” says Gordon Austin, chief of environmental affairs for the New Orleans Sewerage and Water Board. “This is a formality to make sure you’re eligible for [Federal Emergency Management Agency] mitigation funds.” The board still is trying to obtain FEMA funding to mitigate an estimated $98 million in damage from Katrina, which
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.