"The Port of New Orleans handles about 145 million short tons (132 million tonnes) of cargo a year and is the largest faction of the Port of South Louisiana, the latter being the largest and busiest shipping port in the western hemisphere and the 4th busiest in the world.
About 5,000 ships from nearly 60 nations dock at the Port of New Orleans annually. The chief exports are grain and other foods from the Midwestern United States and petroleum products. The leading imports include chemicals, cocoa beans, coffee, and petroleum. The port handles more trade with Latin America than does any other U.S. gateway, including Miami.
New Orleans is also a busy port for barges. The barges use the nation's two main inland waterways, the Mississippi River and the Gulf Intracoastal Waterway, which meet at New Orleans. The port of New Orleans handles about 50,000 barges yearly." [source]
In southern Louisiana, the bed of the Mississippi River is so far below sea level that a flow of at least a hundred and twenty thousand cubic feet per second is needed to hold back salt water and keep it below New Orleans, which drinks the river. Along the ragged edges of the Gulf, whole ecosystems depend on the relationship of fresh salt water, which is in large part controlled by the Corps. Shrimp people want water to be brackish, waterfowl people want it fresh—a situation that causes National Marine Fisheries to do battle with United States Fish and Wildlife while both simultaneously attack the Corps. The industrial interests of the American Ruhr beseech the Corps to maintain their supply of fresh water. Agricultural pumping stations demand more fresh water for their rice but nervily ask the Corps to keep the sediment. Morgan City needs water to get oil boats and barges to rigs offshore, but if Morgan City gets too much water it's the end of Morgan City. Port authorities present special needs, and the owners of grain elevators, and the owners of coal elevators, barge interests, flood-control districts, levee boards. As General Sands says, finishing the list, "A guy who wants to put in a new dock in has to come to us." People suspect the Corps of favoring other people. In addition to all the things the Corps actually does and does not do, there are infinite actions it is imagined not to do, and infinite actions it is imagined to be capable of doing, because the Corps has been conceded the almighty role of God.--John McPhee, The Control of Nature (1989, page 23)
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It can be found collected in an excellent volume, The Control of Nature, that also looks at engineering efforts to control landslides and forest fires in the West, and to stem the flow of lava in Iceland. It's fascinating.
posted by Miko at 7:15 AM on September 4, 2005