Museum. New Orleans CBD was one of the few areas of New Orleans that escaped the catastrophic flooding of 2005's Hurricane Katrina. Geography The Central Business District is located at and has an elevation of . As is true of most of metropolitan New Orleans, the parts of the district nearer the river are higher in elevation than areas further removed from it. According to the United States Census Bureau, the district has a total area of . of which is land and (10.17%) of which is water. Adjacent neighborhoods Iberville Development (north) French Quarter (north) Lower Garden District (south) Central City (south) Tulane/Gravier (west) Boundaries The City Planning Commission defines the boundaries of the Central Business District as these streets: Iberville Street, Decatur Street, Canal Street, the Mississippi River, the New Orleans Morial Convention Center, Julia Street, Magazine Street, the Pontchartrain Expressway, South Claiborne Avenue, Cleveland Avenue, South Derbigny Street and North Derbigny Street. Demographics As of the census of 2000, there were 3,435 inhabitants of the census tracts best corresponding to the boundaries of the New Orleans Downtown Development District. The population density was 1,692 /mi² (664 /km²). Another 4,142 inhabitants of the adjacent French Quarter neighborhood were recorded in the 2000 Census. The CBD, its subdistricts (e.g., the Warehouse District), and the bordering neighborhoods of Tremé, the French Quarter, and the Lower Garden District possessed 21,630 residents, according to the 2000 Census. Government and infrastructure The New Orleans City Hall and surrounding structures, including the circa-1960, architecturally award-winning Main Branch of the New Orleans Public Library face Duncan Plaza, an exercise in 1950s-style urban renewal embodying then-mayor Chep Morrison's desire to create a modern civic center. The New Orleans Civic Center is today much diminished, with the Louisiana Supreme Court building having been torn down in the wake of the court's 2004 departure for the French Quarter, the Louisiana State office building having suffered the same fate, and Duncan Plaza itself having been fenced off. The United States Postal Service operates the New Orleans Main Post Office at 701 Loyola Avenue in the CBD. The Union Passenger Terminal is the terminus for three of Amtrak's long-distance trains, the City of New Orleans, the Crescent and, since 2005, the Sunset Limited (with the elimination, due to Katrina damage, of the eastbound portion of the Sunset Limited route), and also offers inter-city bus service via Greyhound Lines. Interstate Highway