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Navigation on the Gulf Intracoastal Waterway, where it intersects with Bayou Perot, in the vicinity of New Orleans
A section of the Intracoastal Waterway in Pamlico County, North Carolina. The Hobucken Bridge crosses the waterway.

The Intracoastal Waterway is a 4,800-km (3,000-mile) waterway along the Atlantic and Gulf coasts of the United States. Some lengths consist of natural inlets, salt-water rivers, bays, and sounds; others are man-made canals. It provides a navigable route along its length without many of the hazards of travel on the open sea.

The waterway runs for most of the length of the Eastern Seaboard, from its unofficial northern terminus at the Manasquan River in New Jersey, where it connects with the Atlantic Ocean at the Manasquan Inlet, then around the gulf of Mexico to Brownsville, Texas. The waterway is toll-free, but commercial users pay a fuel tax that is used to maintain and improve it. The ICW is a significant portion of the Great Loop, a circumnavigation route encircling the eastern half of the North American continent.

The creation of the Intracoastal Waterway was authorized by the United States Congress in 1919. It is maintained by the United States Army Corps of Engineers. Federal law provides for the waterway to be maintained at a minimum depth of 12 ft (4 m) for most of its length, but inadequate funding has prevented that. Consequently, shoaling or shallow water are problems along several sections of the waterway; some parts have 7-ft (2.1-m) and 9-ft (2.7-m) minimum depths.

The waterway consists of three non-contiguous segments: the Gulf Intracoastal Waterway, extending from Brownsville, Texas east to Carrabelle, Florida, the Florida Gulf Intracoastal Waterway beginning at Tarpon Springs, Florida and extending south to Fort Myers, Florida [1], and the Atlantic Intracoastal Waterway, extending from Key West, Florida to Norfolk, Virginia (milepost 0.0). These segments were originally intended to be connected via a northern Florida dredged waterway from St. Marks to Tarpon Springs and the Cross Florida Barge Canal across northern Florida, but these projects were never completed due to environmental concerns. Additional canals and bays extend a navigable waterway to Boston, Massachusetts.

The Intracoastal Waterway has a good deal of commercial activity; barges haul petroleum, petroleum products, foodstuffs, building materials, and manufactured goods. It is also used extensively by recreational boaters. On the east coast, some of the traffic in fall and spring is by snowbirds who regularly move south in winter and north in summer. The waterway is also used when the ocean is too rough to travel on. Numerous inlets connect the Atlantic and the Gulf of Mexico with the Intracoastal Waterway.

The Intracoastal Waterway connects to several navigable rivers where shipping traffic can travel to inland ports, including the Mississippi, Alabama, Savannah, James, Susquehanna, Delaware, Hudson, and Connecticut Rivers.

Contents

Natural bodies of water

The following natural bodies of water are included in the Intracoastal Waterway system:

Canals

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Major freight canals

Other canals

See also

References

  1. ^ [1] "Alperin, Lynn M., History of the Gulf Intracoastal Waterway, pp 48-50, National Waterways Study, U.S. Army Water Resource Support Center, Institute for Water Resources, 1983"

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