Question: Which airport is located in the largest estuary in North America?
Context: Willapa Bay ( ) is a bay located on the southwest Pacific coast of Washington state in the United States.  The Long Beach Peninsula separates Willapa Bay from the greater expanse of the Pacific Ocean.  With over 260 sqmi of water surface Willapa Bay is the second largest estuary on the United States Pacific coast.  Early settlers called the bay Shoalwater Bay and this name is found on old maps and charts of the region. A new Thames Estuary Airport has been proposed at various times since the 1940s.  London's existing principal airports, Heathrow, Gatwick and Stansted, are each sub-optimally located in various ways, such as being too close to built-up areas or requiring aircraft to fly low over London.  In the case of Heathrow, the growth of air traffic has meant that the airport is operating at 98% capacity.  Several locations for a new airport have been proposed in the Thames Estuary, to the east of London.  These include Maplin Sands off Foulness on the north side of the estuary; Cliffe and the Isle of Grain in Kent on the south side; and artificial islands located off the Isle of Sheppey such as the "Boris Island" proposal championed by Boris Johnson, the then Mayor of London.  Economic considerations have so far ruled out a new coastal airport, while political considerations have ruled out a new inland airport, leaving planners with an as-yet-unresolved dilemma. Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound covering 147 mi (380 km), 120.5 mi (312 km) in Rhode Island.  The Bay forms New England's largest estuary, which functions as an expansive natural harbor and includes a small archipelago.  Small parts of it extend into Massachusetts. The Bay of Santander is both a "comarca" of Cantabria and the largest estuary on the North coast of Spain, with an extension of 22.42 km² 9 km long and 5 km wide.  Due to the influence of Santander and its metropolitan area, nearly half of the population of the region is gathered around it, which makes the anthropic pressure on this area of water quite notable. The Chesapeake Bay ( ) is an estuary in the U.S. states of Maryland and Virginia, lying inland from the Atlantic Ocean and surrounded to the west by the North American mainland and to the east by the Delmarva Peninsula.  It is the largest estuary in North America.  With its northern portion in Maryland and the southern part in Virginia, the Chesapeake Bay is a very important feature for the ecology and economy of those two states, as well as others.  More than 150 major rivers and streams flow into the Bay's 64299 sqmi drainage basin, which covers parts of six states (New York, Pennsylvania, Delaware, Maryland, Virginia and West Virginia) and all of Washington, D.C. Newfoundland ( ; French: "Terre-Neuve" ) is a large Canadian island off the east coast of the North American mainland, and the most populous part of the Canadian province of Newfoundland and Labrador.  It has 29 percent of the province's land area.  The island is separated from the Labrador Peninsula by the Strait of Belle Isle and from Cape Breton Island by the Cabot Strait.  It blocks the mouth of the Saint Lawrence River, creating the Gulf of Saint Lawrence, the world's largest estuary.  Newfoundland's nearest neighbour is the French overseas community of Saint-Pierre and Miquelon. The Ría de Arousa is a ria, a saline estuary, that forms a firth situated on Galicia, Spain.  It is one of the five "Rías Baixas".  The Ría de Arousa estuary is the largest of the estuaries of Galicia.  It is part of the Rias Baixas and is located between the estuary of Muros and Noia to the north and the Pontevedra estuary to the south.  The peninsulas of Barbanza, in the province of A Coruña, and O Salnés, in the province of Pontevedra, are those who define their coasts on the north and south, respectively.  Ría de Muros and Noya () is located in north. Lake Melville is a saltwater tidal extension of Hamilton Inlet on the Labrador coast in the Canadian province of Newfoundland and Labrador.  Comprising 3,069 square kilometres, and stretching 140 kilometres inland to Happy Valley-Goose Bay, it forms part of the largest estuary in the province, primarily draining the Churchill River and Naskaupi River watersheds. Both Lake Melville and Hamilton Inlet are encircled by mountains, with primary settlements at Happy Valley-Goose Bay, North West River, and Sheshatshiu.  A ferry service runs on Lake Melville and Hamilton Inlet, connecting a number communities including Happy Valley-Goose Bay, Rigolet and Cartwright.  Lake Melville was named for Viscount Melville (1742–1811), a prominent British politician. Tangier Island Airport (ICAO: KTGI) is an airport located on Tangier Island in the lower Chesapeake Bay.  It is located in the state of Virginia. Pamlico Sound ( ) in North Carolina in the US is the largest lagoon along the North American East Coast, extending 129 km long and 24 to 48 km (15 to 20 miles) wide.  It is part of a large, interconnected network of lagoon estuaries that includes Albemarle Sound, Currituck Sound, Croatan Sound, Pamlico Sound, Bogue Sound, Core Sound, and Roanoke Sound.  Together, these sounds, known as the Albemarle-Pamlico sound system, comprise the second largest estuary in the United States, covering over 3,000 sq. mi.  of open water. (Chesapeake Bay is the largest.)  The Pamlico Sound is separated from the Atlantic Ocean by the Outer Banks, a row of low, sandy barrier islands that include Cape Hatteras National Seashore, Cape Lookout National Seashore, and Pea Island National Wildlife Refuge.  The Albemarle-Pamlico Sound is one of nineteen great waters recognized by the America's Great Waters Coalition.
Answer: Tangier Island Airport