Neches River in the context of Port Neches, Texas

Beaumont is a city in the U.S. state of Texas. It is the county seat of Jefferson County, within the Beaumont–Port Arthur metropolitan area, located in Southeast Texas on the Neches River about 85 miles (137 km) east of Houston (city center to city center). With a population of 115,282 at the 2020 census, Its metropolitan area was the 10th largest in Texas in 2020, and 130th in the United States.

The city of Beaumont was founded in 1838. The pioneer settlement had an economy based on the development of lumber, farming, and port industries. In 1892, Joseph Eloi Broussard opened the first commercially successful rice mill in Texas, stimulating development of rice farming in the area; he also started an irrigation company (since 1933, established as the Lower Neches Valley Authority) to support rice culture. Rice became an important commodity crop in Texas and is now cultivated in 23 counties.

Jefferson County is a county in the Coastal Plain or Gulf Prairie region of Southeast Texas. The Neches River forms its northeastern boundary. The county was named for U.S. president Thomas Jefferson. The county seat is Beaumont, which is also the largest city within the county.

The county was established in 1835 as a municipality of Mexico, which had gained independence from Spain. Because the area was lightly settled, the Mexican government allowed European Americans from the United States to settle here if they pledged loyalty to Mexico. This was organized as a county in 1837 after Texas achieved independence as a republic. Texas later became part of the US.

Port Arthur is a city in the state of Texas, United States of America, located 90 mi (140 km) east of metro Houston. Part of the Beaumont–Port Arthur metropolitan area, the city lies primarily in Jefferson County, with a small extension in Orange County. The largest oil refinery in the US, the Motiva Refinery, is located in Port Arthur.

The population was 53,818 at the 2010 census, down from 57,755 at the 2000 census. In 2020, its population was 56,039. In the 19th century, initial attempts to settle the area had all failed, mostly. However, in 1895, Arthur Stilwell founded Port Arthur, and the town quickly grew, being incorporated as a city in 1898. It soon developed into a seaport and, eventually, became the center of a large oil-refinery network. The Rainbow Bridge across the Neches River connects Port Arthur to Bridge City.

The U.S. state of Texas has a series of estuaries along its coast on the Gulf of Mexico, most of them bounded by the Texas barrier islands. Estuaries are coastal bodies of water in which freshwater from rivers mixes with saltwater from the sea. Twenty-one drainage basins terminate along the Texas coastline, forming a chain of seven major and five minor estuaries: listed from southwest to northeast, these are the Rio Grande Estuary, Laguna Madre, the Nueces Estuary (Corpus Christi Bay), the Mission–Aransas Estuary (Aransas Bay), the Guadalupe Estuary (San Antonio Bay), the Colorado–Lavaca Estuary (Matagorda Bay), East Matagorda Bay, the San Bernard River and Cedar Lakes Estuary, the Brazos River Estuary, Christmas Bay, the Trinity–San Jacinto Estuary (Galveston Bay), and the Sabine–Neches Estuary (Sabine Lake). Each estuary is named for its one or two chief contributing rivers, excepting Laguna Madre, East Matagorda Bay, and Christmas Bay, which have no major river sources. The estuaries are also sometimes referred to by the names of their respective primary or central water bodies, though each also includes smaller secondary bays, inlets, or other marginal water bodies.

These water bodies include some of the largest and most ecologically productive coastal estuaries in the United States and contribute significantly to the ecological and economic resources of Texas. They are included in a number of national protected areas such as National Wildlife Refuges, a National Seashore, and a National Estuarine Research Reserve, as well as various state parks and other regional protected areas. The two most economically important (the Nueces and Trinity–San Jacinto Estuaries) have been designated by the United States Environmental Protection Agency as estuaries of national significance under the National Estuary Program. The Gulf Intracoastal Waterway runs through each of the major estuaries, linking Texas ports with others along the Gulf Coast of the United States.

The Lower Neches Valley Authority was established in 1933 by the state legislature as a district to store, control, conserve, and utilize the water of the lower Neches River valley in Texas. The LNVA, the second river district created by the state of Texas, is currently one of 23 river districts in the state. It includes all of Jefferson, Hardin, and Tyler counties and parts of Jasper, Liberty, and Chambers counties.

Sabine Lake is a bay on the Gulf coasts of Texas and Louisiana, located approximately 90 miles (140 km) east of Houston and 160 miles (260 km) west of Baton Rouge, adjoining the city of Port Arthur. The lake is formed by the confluence of the Neches and Sabine Rivers and connects to the Gulf of Mexico through Sabine Pass. It forms part of the Texas–Louisiana border, falling within Jefferson and Orange Counties in Texas and Cameron Parish, Louisiana.

Sabine Lake is one of seven major estuaries along the Gulf Coast of Texas. Much of the Louisiana shore is protected by the Sabine National Wildlife Refuge. There is a long history of human habitation around the lake, including Native American settlement dating back at least 1,500 years, European exploration in the eighteenth century, and the growth of Port Arthur in the twentieth century. Today the lake serves as part of the Sabine–Neches Waterway and the Gulf Intracoastal Waterway and is a center for the shipping and petrochemical industries.