Southwest Pass is one of the channels at the mouth of the Mississippi River. [1] It empties into the Gulf of Mexico at the southwesternmost tip of the Mississippi River Delta. It lies in Plaquemines Parish in southeastern Louisiana in the United States. [2] It has been the main shipping channel in the Mississippi River Delta since 1853.
Southwest Pass should not confused with a strait in Vermilion Parish, Louisiana, also known as Southwest Pass.
Concordia Parish borders the Mississippi River in eastern central Louisiana. As of the 2020 census, the population was 18,687. The parish seat is Vidalia. The parish was formed in 1807.
The Atchafalaya River is a 137-mile-long (220 km) distributary of the Mississippi River and Red River in south central Louisiana in the United States. It flows south, just west of the Mississippi River, and is the fifth largest river in North America, by discharge. The name Atchafalaya comes from Choctaw for 'long river', from hachcha, 'river', and falaya, 'long'.
The Natchez District was one of two areas established in the Kingdom of Great Britain's West Florida colony during the 1770s – the other being the Tombigbee District. The first Anglo settlers in the district came primarily from other parts of British America. The district was recognized to be the area east of the Mississippi River from Bayou Sara in the south and Bayou Pierre in the north.
The Mississippi River Delta is the confluence of the Mississippi River with the Gulf of Mexico in Louisiana, southeastern United States. The river delta is a three-million-acre area of land that stretches from Vermilion Bay on the west, to the Chandeleur Islands in the east, on Louisiana's southeastern coast. It is part of the Gulf of Mexico and the Louisiana coastal plain, one of the largest areas of coastal wetlands in the United States. The Mississippi River Delta is the 7th largest river delta on Earth (USGS) and is an important coastal region for the United States, containing more than 2.7 million acres of coastal wetlands and 37% of the estuarine marsh in the conterminous U.S. The coastal area is the nation's largest drainage basin and drains about 41% of the contiguous United States into the Gulf of Mexico at an average rate of 470,000 cubic feet per second.
Head of Passes is where the main stem of the Mississippi River branches off into three distinct directions at its mouth in the Gulf of Mexico: Southwest Pass (west), Pass A Loutre (east) and South Pass (centre). They are part of the "Bird's Foot Delta", the youngest lobe of the evolving Mississippi River Delta.
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 Waveland, Mississippi, to the Dauphin Island Bridge, a distance of about 90 miles (145 km). The sound is separated from the Gulf on its southern side by the Mississippi–Alabama barrier islands: Cat, Ship, Horn, West Petit Bois, Petit Bois, and Dauphin. Ship, Horn, West Petit Bois and Petit Bois Islands are part of the National Park Service's Gulf Islands National Seashore. Those islands separate the sound from the Gulf of Mexico. The sediment of the islands was created partly by the ancient Mississippi River when the St. Bernard Lobe of the Mississippi Delta was active over two thousand years ago. The expansion of the St. Bernard subdelta slowly isolated the Mississippi Sound from ocean dynamics of the open Gulf of Mexico.
The Atchafalaya Basin, or Atchafalaya Swamp, is the largest wetland and swamp in the United States. Located in south central Louisiana, it is a combination of wetlands and river delta area where the Atchafalaya River and the Gulf of Mexico converge. The river stretches from near Simmesport in the north through parts of eight parishes to the Morgan City southern area.
Louisiana's 1st congressional district is a congressional district in the U.S. state of Louisiana. The district comprises land from the northern shore of Lake Pontchartrain south to the Mississippi River delta. It covers most of New Orleans' suburbs, as well as a sliver of New Orleans itself.
Louisiana Highway 1 (LA 1) is a state highway in Louisiana. At 431.88 miles (695.04 km), it is the longest numbered highway of any class in Louisiana. It runs diagonally across the state, connecting the oil and gas fields near the island of Grand Isle with the northwest corner of the state, north of Shreveport.
Barataria Bay, also Barrataria Bay, is a bay of the Gulf of Mexico, about 15 miles (24 km) long and 12 miles (19 km) wide, in southeastern Louisiana, in Jefferson Parish and Plaquemines Parish, United States. It is separated from the gulf by two barrier islands, Grand Isle and Grand Terre.
West Pointe à la Hache is an unincorporated community in Plaquemines Parish, Louisiana, United States.
La Balize, Louisiana was a French fort and settlement near the mouth of the Mississippi River, in what later became Plaquemines Parish. The village's name meant "seamark." La Balize was historically and economically important for overseeing the river. It was rebuilt several times because of hurricane damage. The active delta lobe of the river's mouth is called the Balize Delta, after the settlement, or the Birdfoot Delta, because of its shape.
Wax Lake was a lake in St. Mary Parish, Louisiana that was converted into an outlet channel, the Wax Lake outlet, to divert water from the Atchafalaya River to the Gulf of Mexico.
Southwest Pass is a narrow strait in Vermilion Parish in southern Louisiana in the United States. It connects the Gulf of Mexico to its south with Vermilion Bay to its north. It is bounded on the east by Marsh Island and on the west by the Louisiana mainland in southeastern Vermilion Parish.
Vermilion Bay is a bay in southern Louisiana in the United States.
Cote Blanche Bay is a bay in southern Louisiana in the United States. It is divided into East Cote Blanche Bay and West Cote Blanche Bay.
Ironton is an unincorporated community in Plaquemines Parish, Louisiana, United States.
Pass a Loutre Wildlife Management Area (WMA) is a 66,000-acre (270 km2) protected wetland in Plaquemines Parish, Louisiana, United States. The WMA is located due south and bordering the 48,000 acre Delta National Wildlife Refuge, accessible only by air or boat, contains the Pass A L'Outre Lighthouse, and Port Eads is within the boundary.
Burrwood was a community located near the far south end of the delta of the Mississippi River in Plaquemines Parish, Louisiana, United States. At one time the town had an estimated population of 1,000, but today it is uninhabited, with most of its territory fully or partially submerged by coastal erosion.
Davant is an unincorporated community located in the delta of the Mississippi River in the parish of Plaquemines, Louisiana, United States.