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The Intracoastal Waterway (ICW) is a
inland waterway A waterway is any navigable body of water. Broad distinctions are useful to avoid ambiguity, and disambiguation will be of varying importance depending on the nuance of the equivalent word in other ways. A first distinction is necessary bet ...
along the Atlantic and
Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
coasts of the United States, running from
Massachusetts Massachusetts ( ; ), officially the Commonwealth of Massachusetts, is a U.S. state, state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode ...
southward along the Atlantic Seaboard and around the southern tip of
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
, then following the Gulf Coast to Brownsville,
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
. Some sections of the waterway consist of natural inlets, saltwater rivers, bays, and sounds, while others are artificial canals. Maintained, improved, and extensively dredged where necessary by the
United States Army Corps of Engineers The United States Army Corps of Engineers (USACE) is the military engineering branch of the United States Army. A direct reporting unit (DRU), it has three primary mission areas: Engineer Regiment, military construction, and civil wo ...
, it provides a navigable route along its length without many of the hazards of travel on the open sea.


Context and early history

Since the Eastern coastline represented the national border, and commerce of the time was chiefly by water, the fledgling
United States government The Federal Government of the United States of America (U.S. federal government or U.S. government) is the Federation#Federal governments, national government of the United States. The U.S. federal government is composed of three distinct ...
established a degree of national control over it. Inland transportation to supply the coasting trade at the time was less known and virtually undeveloped, but when new lands and their favorable river systems were added with the
Northwest Territory The Northwest Territory, also known as the Old Northwest and formally known as the Territory Northwest of the River Ohio, was formed from part of the unorganized western territory of the United States after the American Revolution. Established ...
in 1787, the
Northwest Ordinance The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio and also known as the Ordinance of 1787), enacted July 13, 1787, was an organic act of the Congress of the Co ...
established a radically new and free national policy for their development and transportation use. Over time,
internal improvements Internal improvements is the term used historically in the United States for public works from the end of the American Revolution through much of the 19th century, mainly for the creation of a transportation infrastructure: roads, turnpikes, can ...
of natural coastal and inland waterways would develop into the Great Loop, which allows for waterborne circumnavigation of the eastern continental United States, using minimal ocean travel, with the Intracoastal Waterway providing its eastern end. In 1808, the first federal government report on existing, possible, and likely avenues of transportation improvement was presented; it included much of the distance where the ICW now traverses the Atlantic coast. At the request of the
Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...
, Treasury Secretary
Albert Gallatin Abraham Alfonse Albert Gallatin (January 29, 1761 – August 12, 1849) was a Genevan-American politician, diplomat, ethnologist, and linguist. Often described as "America's Swiss Founding Father", he was a leading figure in the early years ...
presented an overall plan for future transportation developments of national importance and scope. Along with inland east–west improvements, Gallatin's north–south improvements included the following: While Gallatin discussed the details of engineering, construction, and costs, including the national benefits to accrue from lowered transportation costs between domestic and international markets, his full $20 million, 10-year plan was never approved. That is not to say his plan was never implemented, however, for with experience in the
War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...
shortly thereafter and the attendant British blockade, the continued need for such facility was soon highlighted. Since Gallatin had based his proposals on the known advantageous natural geographic features of the country, many of his proposals became the locations of navigation improvements that were surveyed, authorized, and constructed starting with the 1824 General Survey Act and the first of many pieces of rivers and harbors legislation, as well by individual state-built improvements. Since these 1824 acts, the
United States Army Corps of Engineers The United States Army Corps of Engineers (USACE) is the military engineering branch of the United States Army. A direct reporting unit (DRU), it has three primary mission areas: Engineer Regiment, military construction, and civil wo ...
(USACE) has responsibility for navigation waterway improvements and maintenance. All four proposed sections of Gallatin's intracoastal plan were eventually built; the Delaware and Raritan Canal was later abandoned for a better alternative, but the Cape Cod Canal remains in operation, and the Delaware and the Dismal Swamp portions still form part of the larger present-day Intracoastal Waterway.


19th-century growth

In 1826, Congress authorized the first survey for an inland canal between the Atlantic Ocean and Gulf of Mexico. After the
Civil War A civil war is a war between organized groups within the same Sovereign state, state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies.J ...
, government funding shifted from waterways to railroads; still, coastal improvements authorized for development included the Houston Ship Channel and the
Delaware River The Delaware River is a major river in the Mid-Atlantic region of the United States and is the longest free-flowing (undammed) river in the Eastern United States. From the meeting of its branches in Hancock, New York, the river flows for a ...
in 1872. The following year, the Senate's Select Committee on Transportation Routes to the Seaboard looked at the need for more haulage capacity to move freight to the coasts. But their "Report of Windom Select Committee" their plans and recommendations "received less attention than was anticipated, of course by reason of the rapid growth of interest in railways". In the River and Harbors Appropriations Acts of 1882 and 1884, Congress signaled its intent to improve waterways to benefit the nation by promoting competition among transportation modes. The 1882 act was the first act of Congress to combine appropriations for development of the nation's waterways with a reaffirmation of the policy of freedom from tolls and other user charges, first stated in 1787; it was passed over President Chester Arthur's veto, who considered it a waste of the federal government's growing budget surplus. In 1887, the Interstate Commerce Act established federal regulation of railroads; Congress continued to promote freedom from tolls or special taxes on waterways. In 1890, Congress passed the
Sherman Antitrust Act The Sherman Antitrust Act of 1890 (, ) is a United States antitrust law which prescribes the rule of free competition among those engaged in commerce and consequently prohibits unfair monopolies. It was passed by Congress and is named for S ...
, the first federal statute to limit cartels and monopolies, but the federal government used it minimally until
Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...
's presidency more than 10 years later. Continued insufficient capacity of railroad transportation became apparent following the harvest of 1906.


20th-century developments

The invention of the
diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
in 1892 eventually led to the conversion of fuels for transportation from coal and steam to diesel and the
internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal comb ...
. The Rivers and Harbors Act of 1909 set national policy for an intracoastal waterway from Boston to the
Rio Grande The Rio Grande ( or ) in the United States or the Río Bravo (del Norte) in Mexico (), also known as Tó Ba'áadi in Navajo language, Navajo, is one of the principal rivers (along with the Colorado River) in the Southwestern United States a ...
, and the Rivers and Harbors Act of 1910 authorized a channel on the Gulf Intracoastal Waterway between the
Apalachicola River The Apalachicola River is a river, approximately long, in the state of Florida. The river's large drainage basin, watershed, known as the ACF River Basin, Apalachicola, Chattahoochee and Flint (ACF) River Basin, drains an area of approximately ...
and St. Andrews Bay,
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
(completed in 1936), as well as a study of the most efficient means to move cargo. Between 1910 and 1914, navigation channels were deepened, and the screw propeller proved efficient for improved steering and flanking qualities. The Panama Canal Act was passed in 1911, which proved key to the revival of waterway transportation in the United States, because the opening of
Panama Canal The Panama Canal () is an artificial waterway in Panama that connects the Caribbean Sea with the Pacific Ocean. It cuts across the narrowest point of the Isthmus of Panama, and is a Channel (geography), conduit for maritime trade between th ...
in 1914 allowed coastal shipping to extend to the U.S. West Coast for the first time. The law also prohibited railroads from owning, controlling, or operating a water carrier through the canal and led to succeeding legislation that eliminated monopoly of transportation modes by railroads. The country's
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
experience demonstrated the need for bulk cargo transportation, with Congress establishing the federal barge lines and spurring development of cheaper ways to transport farm commodities, including the first use of standardized freight barges. In 1924, Congress incorporated the Inland Waterways Corporation, generally regarded as the beginning of modern water carrier operations, and in 1925, it authorized construction of the Louisiana and Texas Intracoastal Waterway, as well as surveys east of
New Orleans New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a Consolidated city-county, consolidated city-parish located along the Mississippi River in the U.S. state of Louisiana. With a population of 383,997 at the 2020 ...
to Apalachicola Bay; this was the first legislation to treat the ICW as a continuous whole. The River and Harbor Act of 1927 authorized the portion of the Atlantic Intracoastal Waterway, using the route planned out by the Jacksonville District of the Corps of Engineers. During
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, the need for efficient transportation of bulk materials within the continental United States was well demonstrated after German submarines sank numerous merchant ships off the East Coast. By 1942, the ICW channel was completed between New Orleans and Corpus Christi. Today, federal law provides for the waterway to be maintained at a minimum depth of for most of its length, but inadequate funding has prevented that. Consequently, for larger ships, shoaling or shallow waters are encountered along several sections of the waterway, with these having or minimum depths from earlier improvements. While no tolls are charged for waterway usage, commercial users have been charged a
fuel tax A fuel tax (also known as a petrol, gasoline or gas tax, or as a fuel duty) is an excise tax imposed on the sale of fuel. In most countries, the fuel tax is imposed on fuels which are intended for transportation. Fuel tax receipts are often dedica ...
since 1978, which is used to maintain and improve facilities. That year, the Inland Waterways Revenue Act imposed a barge fuel tax; originally set at 4 cents per gallon in 1980, it was gradually raised to 10 cents per gallon by 1986. To hold these funds, the act also created the Inland Waterways Trust Fund under the U.S. Treasury, which are used to cover half the cost of new construction and major rehabilitation of the inland waterways infrastructure (33 U.S.C. ch.32). The Water Resources Development Act of 1986 was a wide-ranging bill regarding all water resources utilization nationally. Concerning transportation on waterways, this law established the Inland Waterways Users Board to make recommendations regarding construction and rehabilitation priorities and spending levels for the inland waterways, and also gradually increased the incremental fuel tax to 20 cents per gallon by 1995.


Current route

The Intracoastal Waterway runs for most of the length of the Eastern Seaboard. The waterway consists of three non-contiguous segments: from
Brownsville, Texas Brownsville ( ) is a city in the U.S. state of Texas and the county seat of Cameron County, Texas, Cameron County, located on the western Gulf Coast in South Texas, adjacent to the Mexico–United States border, border with Matamoros, Tamaulipas ...
, east to
Carrabelle, Florida Carrabelle is a city in Franklin County along Florida's Panhandle, United States. It is located east of Apalachicola at the mouth of the Carrabelle River on the Gulf of Mexico. The population was 2,606 as of the 2020 census. History In 152 ...
; from
Tarpon Springs, Florida Tarpon Springs is a city in Pinellas County, Florida, United States. Downtown Tarpon Springs has long been a focal point and underwent beautification in 2010. It is part of the Tampa Bay area. The population was 25,117 at the 2020 census. As of ...
, south to
Fort Myers, Florida Fort Myers (or Ft. Myers) is a city in and the county seat of Lee County, Florida, United States. As of the 2020 United States census, 2020 census, the population was 86,395; it was estimated to have grown to 95,949 in 2022, making it the List o ...
; and from
Key West Key West is an island in the Straits of Florida, at the southern end of the U.S. state of Florida. Together with all or parts of the separate islands of Dredgers Key, Fleming Key, Sunset Key, and the northern part of Stock Island, it con ...
, Florida, north to
Portsmouth, Virginia Portsmouth is an Independent city (United States), independent city in southeastern Virginia, United States. It lies across the Elizabeth River (Virginia), Elizabeth River from Norfolk, Virginia, Norfolk. As of the 2020 United States census, 2020 ...
(milepost 0.0). The first and second sections are collectively referred to as the Gulf Intracoastal Waterway, and the third is referred to as the Atlantic Intracoastal Waterway (AIWW). The first and second sections were intended to be connected via a dredged waterway from Tarpon Springs to St. Marks, Florida (which is near Carrabelle), and the second and third sections were intended to be connected via the Cross Florida Barge Canal across northern Florida. These projects were never completed because of environmental concerns. Additional canals and bays extend a navigable waterway north of Portsmouth. North of the Manasquan Inlet connecting the Manasquan River in New Jersey with the Atlantic Ocean the route is coastal, traversing the balance of New Jersey offshore,
New York Bay New York Bay is the large tidal body of water in the New York–New Jersey Harbor Estuary where the Hudson River, Raritan River, and Arthur Kill empty into the Atlantic Ocean between Sandy Hook, New Jersey, Sandy Hook and Rockaway Point. Geogr ...
, the
East River The East River is a saltwater Estuary, tidal estuary or strait in New York City. The waterway, which is not a river despite its name, connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island, ...
,
Long Island Sound Long Island Sound is a sound (geography), marine sound and tidal estuary of the Atlantic Ocean. It lies predominantly between the U.S. state of Connecticut to the north and Long Island in New York (state), New York to the south. From west to east, ...
,
Block Island Sound Block Island Sound is a marine sound in the open Atlantic Ocean, approximately wide, separating Block Island from the coast of mainland Rhode Island. On the west, it extends to Montauk Point on the eastern tip of Long Island, as well as P ...
, Rhode Island Sound,
Buzzards Bay Buzzards Bay is a bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. It is approximately 28 miles (45 kilometers) long by 8 miles (12 kilometers) wide. It is a popular destination for fishing, boating, and tourism. Buzzards ...
, the Cape Cod Canal,
Cape Cod Bay Cape Cod Bay is a large bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. Measuring below a line drawn from Brant Rock in Marshfield to Race Point in Provincetown, Massachusetts, it is enclosed by Cape Cod to the south ...
, and
Massachusetts Bay Massachusetts Bay is a bay on the Gulf of Maine that forms part of the central coastline of Massachusetts. Description The bay extends from Cape Ann on the north to Plymouth Harbor on the south, a distance of about . Its northern and sout ...
before reaching an approximately 5 mile inland passage to its official terminus point, Annisquam, Massachusetts, via the Annisquam River, a U.S. Army Corps maintained channel 26 miles (42 km) northeast of
Boston Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...
connecting
Gloucester Gloucester ( ) is a cathedral city, non-metropolitan district and the county town of Gloucestershire in the South West England, South West of England. Gloucester lies on the River Severn, between the Cotswolds to the east and the Forest of Dean ...
and Annisquam. The Intracoastal Waterway sees a large amount of commercial activity: barges haul petroleum and 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 composed of snowbirds who regularly move south in winter and north in summer. The waterway is also used when the ocean is too rough for travel. 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 Mississippi ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the s ...
,
Alabama Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gu ...
,
Savannah A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach th ...
, James,
Delaware Delaware ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic and South Atlantic states, South Atlantic regions of the United States. It borders Maryland to its south and west, Pennsylvania to its north, New Jersey ...
, Hudson, and
Connecticut Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...
rivers. The St. Lawrence Seaway and
Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
can be accessed via connections with the
Hudson River The Hudson River, historically the North River, is a river that flows from north to south largely through eastern New York (state), New York state. It originates in the Adirondack Mountains at Henderson Lake (New York), Henderson Lake in the ...
and
Erie Canal The Erie Canal is a historic canal in upstate New York that runs east–west between the Hudson River and Lake Erie. Completed in 1825, the canal was the first navigability, navigable waterway connecting the Atlantic Ocean to the Great Lakes, ...
, and via the
Mississippi Mississippi ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the s ...
and
Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...
Rivers and the
Chicago Sanitary and Ship Canal The Chicago Sanitary and Ship Canal, historically known as the Chicago Drainage Canal, is a canal system that connects the Chicago River to the Des Plaines River. It reverses the direction of the Main Stem and the South Branch of the Chicago ...
and Cal-Sag Channel.


Natural bodies of water

The following natural bodies of water are included in or connect with the Intracoastal Waterway system: *
Albemarle Sound Albemarle Sound () is a large estuary on the coast of North Carolina in the United States located at the confluence of a group of rivers, including the Chowan River, Chowan and Roanoke River, Roanoke. It is separated from the Atlantic Ocean b ...
* Amelia River * Annisquam River * Apalachicola Bay * St. Andrews Bay * Aransas Bay * Barnegat Bay *
Biscayne Bay Biscayne Bay is a lagoon with characteristics of an estuary located on the Atlantic coast of South Florida. The northern end of the lagoon is surrounded by the densely developed heart of the Miami metropolitan area while the southern end is large ...
* Boca Ciega Bay * Bogue Sound * Bon Secour Bay *
Buzzards Bay Buzzards Bay is a bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. It is approximately 28 miles (45 kilometers) long by 8 miles (12 kilometers) wide. It is a popular destination for fishing, boating, and tourism. Buzzards ...
*
Cape Cod Bay Cape Cod Bay is a large bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. Measuring below a line drawn from Brant Rock in Marshfield to Race Point in Provincetown, Massachusetts, it is enclosed by Cape Cod to the south ...
*
Cape Fear River The Cape Fear River is a blackwater river in east-central North Carolina. It flows into the Atlantic Ocean near Cape Fear, from which it takes its name. The river is formed at the confluence of the Haw River and the Deep River in the town of ...
*
Charleston Harbor The Charleston Harbor is an inlet (8 sq mi/20.7 km2) of the Atlantic Ocean at Charleston, South Carolina. The inlet is formed by the junction of Ashley River (South Carolina), Ashley and Cooper River (South Carolina), Cooper rivers at . Morr ...
* Charlotte Harbor *
Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Ea ...
* Choctawhatchee Bay *
Connecticut River The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for through four states. It rises 300 yards (270 m) south of the U.S. border with Quebec, Canada, and discharges into Long Isl ...
* Corpus Christi Bay *
Delaware Bay Delaware Bay is the estuary outlet of the Delaware River on the northeast seaboard of the United States, lying between the states of Delaware and New Jersey. It is approximately in area, the bay's freshwater mixes for many miles with the saltw ...
*
East River The East River is a saltwater Estuary, tidal estuary or strait in New York City. The waterway, which is not a river despite its name, connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island, ...
* Elizabeth River *
Florida Bay Florida Bay is the bay located between the southern end of the Florida mainland (the Everglades, Florida Everglades) and the Florida Keys in the United States. It is a large, shallow estuary that while connected to the Gulf of Mexico, has limited ...
* Galveston Bay *
Gulf of Maine The Gulf of Maine is a large gulf of the Atlantic Ocean on the east coast of North America. It is bounded by Cape Cod at the eastern tip of Massachusetts in the southwest and by Cape Sable Island at the southern tip of Nova Scotia in the northea ...
*
Halifax River The Halifax River is part of the Atlantic Intracoastal Waterway, located in northeast Volusia County, Florida. The waterway was originally known as the North Mosquito River, but was renamed after George Montagu-Dunk, 2nd Earl of Halifax (for ...
*
Hampton Roads Hampton Roads is a body of water in the United States that serves as a wide channel for the James River, James, Nansemond River, Nansemond, and Elizabeth River (Virginia), Elizabeth rivers between Old Point Comfort and Sewell's Point near whe ...
*
Hudson River The Hudson River, historically the North River, is a river that flows from north to south largely through eastern New York (state), New York state. It originates in the Adirondack Mountains at Henderson Lake (New York), Henderson Lake in the ...
*
Indian River Lagoon The Indian River Lagoon is a grouping of three lagoons: the Mosquito Lagoon, the Banana River, and the Indian River, on the Atlantic Coast of Florida; one of the most biodiverse estuaries in the Northern Hemisphere and is home to more than 4, ...
* Ipswitch Bay *
Laguna Madre The Laguna Madre is a long, shallow, hypersaline lagoon along the western coast of the Gulf of Mexico in Nueces County, Texas, Nueces, Kenedy County, Texas, Kenedy, Kleberg County, Texas, Kleberg, Willacy County, Texas, Willacy and Cameron Coun ...
* Lake Cocodrie * Lake Worth Lagoon * Little River *
Long Island Sound Long Island Sound is a sound (geography), marine sound and tidal estuary of the Atlantic Ocean. It lies predominantly between the U.S. state of Connecticut to the north and Long Island in New York (state), New York to the south. From west to east, ...
* Lower New York Bay *
Mobile Bay Mobile Bay ( ) is a shallow inlet of the Gulf of Mexico, lying within the state of Alabama in the United States. Its mouth is formed by the Fort Morgan Peninsula on the eastern side and Dauphin Island, a barrier island on the western side. T ...
*
Matagorda Bay Matagorda Bay () is a large Gulf of Mexico bay on the Texas coast, lying in Calhoun and Matagorda counties and located approximately northeast of Corpus Christi, east-southeast of San Antonio, south-southwest of Houston, and south-southea ...
*
Mississippi Sound The Mississippi Sound is a sound along the Gulf Coast of the United States. It runs east-west along the southern coasts of Mississippi and Alabama, from the mouth of the Pearl River at the Mississippi-Louisiana state border to the Dauphin Islan ...
*
Narragansett Bay Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound covering , of which is in Rhode Island. The bay forms New England's largest estuary, which functions as an expansive natural harbor and includes a small archipelago. S ...
*
Pamlico Sound Pamlico Sound ( ) is a large estuarine lagoon in North Carolina. The largest lagoon along the North American East Coast, it extends long and wide. It is part of a large, interconnected network of similar lagoons that includes Albemarle Sou ...
* Pensacola Bay * Perdido Bay *
Sabine Lake Sabine Lake is a bay on the Gulf coasts of Texas and Louisiana, located approximately east of Houston and west of Baton Rouge, Louisiana, Baton Rouge, adjoining the city of Port Arthur, Texas, Port Arthur. The lake is formed by the confluence ...
* San Antonio Bay *
Sarasota Bay Sarasota Bay is a lagoon located off the central west coast of Florida in the United States. Though no significant single stream of freshwater enters the bay, with a drainage basin limited to 150 square miles in Manatee and Sarasota counties, it ...
* Shallotte River * The Narrows * Toms River *
Upper New York Bay New York Harbor is a bay that covers all of the Upper Bay. It is at the mouth of the Hudson River near the East River tidal estuary on the East Coast of the United States. New York Harbor is generally synonymous with Upper New York Bay ...
* Waccamaw River * Winyah Bay


East Coast canals


Major freight canals

* Cape Cod Canal *
Chesapeake and Delaware Canal The Chesapeake & Delaware Canal (C&D Canal) is a -long, -wide and -deep ship canal that connects the Delaware River with the Chesapeake Bay in the states of Delaware and Maryland in the United States. In the mid-17th century, mapmaker Augus ...


Other canals

* Albemarle and Chesapeake Canal * Alligator-Pungo Canal * Assawoman Canal * Dismal Swamp Canal * Cape May Canal * Delaware and Raritan Canal – no longer operational or part of the Intracoastal Waterway * Okeechobee Waterway * Point Pleasant Canal * Lewes and Rehoboth Canal


See also

* Inland waterways of the United States * Waterways forming and crossings of the Atlantic Intracoastal Waterway * Waterways forming and crossings of the Gulf Intracoastal Waterway


References


External links


U.S. Army Corps of Engineers – Atlantic Intracoastal Waterway information siteHistory of the Gulf Intracoastal WaterwayAtlantic Intracoastal Waterway Association
{{Authority control Waterways in the United States East Coast of the United States Gulf Coast of the United States Gulf of Mexico Historic American Engineering Record in Texas Sea lanes Canals opened in 1936 Bodies of water of New Jersey Bodies of water of Delaware Bodies of water of Maryland Bodies of water of Virginia Bodies of water of North Carolina Bodies of water of South Carolina Bodies of water of Georgia (U.S. state) Bodies of water of Florida Bodies of water of Alabama Bodies of water of Mississippi Bodies of water of Louisiana Bodies of water of Texas Bodies of water of Massachusetts Bodies of water of New York (state) Bodies of water of Connecticut Water transportation in the United States Navarre, Florida Geography of Savannah, Georgia Biloxi, Mississippi