Passamaquoddy Bay

Passamaquoddy Bay
Quiet kiai · Public domain · source
Name	Passamaquoddy Bay
Location	Bay of Fundy
Type	Bay
Inflow	St. Croix River
Outflow	Bay of Fundy
Basin countries	United States; Canada
Islands	Deer Island; Campobello Island

Contents

Passamaquoddy Bay is an embayment connecting to the Bay of Fundy between the U.S. state of Maine and the Canadian province of New Brunswick, adjacent to Grand Manan Island and including notable islands such as Campobello Island and Deer Island. The bay lies near border communities including Calais, Maine and St. Andrews, New Brunswick, and is influenced by tidal dynamics studied by researchers from institutions such as the University of New Brunswick and the University of Maine. Historically and contemporaneously the bay has been central to interactions involving the Passamaquoddy people, the Treaty of Paris (1783), the Webster–Ashburton Treaty, and regional development tied to industries associated with Saint John River trade and Bay of Fundy fisheries.

Geography

The bay opens into the Bay of Fundy and receives freshwater from tributaries like the St. Croix River, bounded by landforms including Campobello Island, Grand Manan Island, and Mowhannock Island near Charlotte County, New Brunswick. Tidal range in the region is part of the larger Bay of Fundy tidal system studied alongside features such as the Fundy Basin and Hammond River, with hydrographic surveys conducted by agencies like the Canadian Hydrographic Service and the National Oceanic and Atmospheric Administration. Coastal geomorphology reflects glacial history connected to the Laurentide Ice Sheet and marine terraces comparable to those on Nova Scotia and Prince Edward Island.

Indigenous presence around the bay predates European contact, with the Passamaquoddy people maintaining seasonal settlements and maritime practices similar to those of the Mi'kmaq and Maliseet, and participating in networks later referenced in documents like the Jay Treaty. European exploration brought figures tied to Basque whalers, Samuel de Champlain, and later British and French colonial activities associated with Acadia and the Seven Years' War. Border demarcation debates involving the bay featured in negotiations culminating in the Treaty of Paris (1783) and the Webster–Ashburton Treaty, with local ramifications seen during the War of 1812 and in cross-border incidents documented by institutions such as the Library and Archives Canada and the National Archives and Records Administration. Fishing, shipbuilding, and later steamship routes connected the bay to ports like Saint John, New Brunswick and Boston, Massachusetts.

Marine and coastal ecosystems in the bay support species monitored by organizations such as the Department of Fisheries and Oceans (Canada) and the National Marine Fisheries Service, including populations of Atlantic salmon, American eel, and invertebrates comparable to those in the Bay of Fundy like soft-shell clam beds and lobster fisheries. Habitats include salt marshes, eelgrass beds, and mudflats that provide refuge for migratory birds tracked by groups such as the Audubon Society and the Canadian Wildlife Service, and are affected by issues addressed by research centers at the Acadia University and the Atlantic Salmon Federation. Environmental pressures include historical log driving, effluent debated in cases linked to regulators such as the Environmental Protection Agency and Environment and Climate Change Canada, and contemporary concerns over sea level rise examined by the Intergovernmental Panel on Climate Change and regional climate initiatives.

Economic activity around the bay has historically centered on fisheries—notably lobster and herring—as well as shipbuilding and cross-border trade connecting ports like St. Stephen, New Brunswick and Calais, Maine. Modern enterprises include aquaculture ventures influenced by policy from the Department of Fisheries and Oceans (Canada) and the National Oceanic and Atmospheric Administration, small-scale tourism operations tied to attractions such as the Roosevelt Campobello International Park, and commercial services serving regional supply chains linking to nodes like Saint John, New Brunswick and Bar Harbor, Maine. Transportation infrastructure includes ferry services like those to Campobello Island and shipping lanes monitored by the Canadian Coast Guard and the United States Coast Guard.

Recreational use encompasses boating, birdwatching, and angling promoted by local chambers of commerce in Charlotte County, New Brunswick and Washington County, Maine, and anchored by destinations such as Roosevelt Campobello International Park, Fundy National Park (regional association), and historic sites in St. Andrews, New Brunswick. Kayaking and sailing routes link to maritime heritage trails recognized by organizations like the Canadian Kennel Club (regional events), and cultural programming often references figures such as Franklin D. Roosevelt whose summer retreat at Campobello Island is a focal point for heritage tourism. Seasonal festivals and markets connect communities including Eastport, Maine and St. Stephen, New Brunswick to regional visitor circuits.

The bay lies along the international boundary established through treaties such as the Treaty of Paris (1783) and adjudicated by agreements including the Webster–Ashburton Treaty, with jurisdictional management involving provincial authorities in New Brunswick and state agencies in Maine. Cross-border cooperation occurs through forums and institutions like the International Joint Commission, bilateral enforcement by the Royal Canadian Mounted Police and the United States Border Patrol, and collaborative conservation efforts with groups such as the North Atlantic Marine Alliance and regional Indigenous governments including the Passamaquoddy Tribe at Pleasant Point and Passamaquoddy Tribe at Indian Township. Contemporary disputes and cooperative projects address fisheries allocation, maritime boundary questions, and infrastructure coordination coordinated with national departments including the Department of State (United States) and Global Affairs Canada.