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Seavey's Island, site of the
Portsmouth Naval Shipyard The Portsmouth Naval Shipyard (PNS), often called the Portsmouth Navy Yard, is a United States Navy shipyard on Seavey's Island in Kittery, Maine, bordering Portsmouth, New Hampshire. The naval yard lies along the southern boundary of Maine on ...
, is located in the
Piscataqua River The Piscataqua River (Abenaki language, Abenaki: ''Pskehtekwis'') is a tidal river forming the boundary of the U.S. states of New Hampshire and Maine from its origin at the confluence of the Salmon Falls River and Cochecho River to the Atlant ...
in Kittery,
Maine Maine ( ) is a U.S. state, state in the New England region of the United States, and the northeasternmost state in the Contiguous United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Provinces and ...
, United States, opposite
Portsmouth Portsmouth ( ) is a port city status in the United Kingdom, city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island, off the south coast of England in the Solent, making Portsmouth the only city in En ...
,
New Hampshire New Hampshire ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
. It encompasses .


History

What is today called Seavey's Island was originally five separate islands conjoined to accommodate the Portsmouth Naval Shipyard. Colonists originally used the rocky islands for collecting wild
berries A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone fruit, stone or pit (fruit), pit although many wikt:pip#Etymology 2, pips or seeds may be p ...
or drying
fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...
on
fish flake A fish flake is a platform built on poles and spread with boughs for drying cod on the foreshores of fishing villages and small coastal towns in Newfoundland and Nordic countries. Spelling variations for fish flake in Newfoundland include ', ...
s. When
Secretary of the Navy The Secretary of the Navy (SECNAV) is a statutory officer () and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. On March 25, 2025, John Phelan was confirm ...
Benjamin Stoddert decided to create the first federal
shipyard A shipyard, also called a dockyard or boatyard, is a place where ships are shipbuilding, built and repaired. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Compared to shipyards, which are sometimes m ...
in 1800, he authorized the purchase for $5,500 of Fernald's Island (also called Dennett's Island). The largest of the five, Seavey's Island, would be annexed in 1866 and give the grouping its familiar name. Approved by
Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...
in 1900, a
granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...
drydock A dry dock (sometimes drydock or dry-dock) is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, ...
was built in the former gut between Fernald's and Seavey's islands. Clark's, Jamaica and another island were attached to Seavey's. Atop a hill on the southern end of Seavey's Island stood an earthwork defense called Fort Sullivan, built in 1775 to supplement Fort William and Mary and Fort McClary in the protection of Portsmouth Harbor during the
Revolution In political science, a revolution (, 'a turn around') is a rapid, fundamental transformation of a society's class, state, ethnic or religious structures. According to sociologist Jack Goldstone, all revolutions contain "a common set of elements ...
and, later,
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 ...
. After 1815 it was abandoned, then reactivated from 1861 until 1865 during the
American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
as an 11 gun, 8 inch Rodman naval battery. Another early battery was to the west on Henderson's Point. But on July 22, 1905, the point was blown up in what was then the largest
dynamite Dynamite is an explosive made of nitroglycerin, sorbents (such as powdered shells or clay), and Stabilizer (chemistry), stabilizers. It was invented by the Swedish people, Swedish chemist and engineer Alfred Nobel in Geesthacht, Northern German ...
explosion ever attempted. Because it projected into the Piscataqua River channel, Henderson's Point created a navigational hazard for
warship A warship or combatant ship is a naval ship that is used for naval warfare. Usually they belong to the navy branch of the armed forces of a nation, though they have also been operated by individuals, cooperatives and corporations. As well as b ...
s visiting the navy yard. Consequently, a
cofferdam A cofferdam is an enclosure built within a body of water to allow the enclosed area to be pumped out or drained. This pumping creates a dry working environment so that the work can be carried out safely. Cofferdams are commonly used for constru ...
was constructed, behind which of rock and of soil were excavated. Explosives were detonated to remove the rest, with debris flying in the air. Within seconds, the river was widened by . In 1908, the Portsmouth Naval Prison was completed on the southern side of Seavey's Island at the former site of Camp Long, a
stockade A stockade is an enclosure of palisades and tall walls, made of logs placed side by side vertically, with the tops sharpened as a defensive wall. Etymology ''Stockade'' is derived from the French word ''estocade''. The French word was derived f ...
named for
Secretary of the Navy The Secretary of the Navy (SECNAV) is a statutory officer () and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. On March 25, 2025, John Phelan was confirm ...
John Long, where 1,612
prisoners of war A prisoner of war (POW) is a person held captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610. Belligerents hold prisoners of war for a ...
from the
Battle of Santiago de Cuba The Battle of Santiago de Cuba was a decisive naval engagement that occurred on July 3, 1898 between an United States, American fleet, led by William T. Sampson and Winfield Scott Schley, against a Restoration (Spain), Spanish fleet led by Pascu ...
were confined from July 11 to mid-September 1898 during the
Spanish–American War The Spanish–American War (April 21 – August 13, 1898) was fought between Restoration (Spain), Spain and the United States in 1898. It began with the sinking of the USS Maine (1889), USS ''Maine'' in Havana Harbor in Cuba, and resulted in the ...
. Camp Heywood, a Marine camp named after Colonel Charles Heywood, was located just north of the naval prison. It was occupied after the 1st Battalion's return from
Cuba Cuba, officially the Republic of Cuba, is an island country, comprising the island of Cuba (largest island), Isla de la Juventud, and List of islands of Cuba, 4,195 islands, islets and cays surrounding the main island. It is located where the ...
in late August until September 21, 1898. According to the
National Trust for Historic Preservation The National Trust for Historic Preservation is a privately funded, nonprofit organization based in Washington, D.C., that works in the field of historic preservation in the United States. The member-supported organization was founded in 1949 ...
, the Portsmouth Naval Shipyard has 62 buildings listed on the
National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...
. Seavey's Island was the subject of a border dispute between New Hampshire and Maine in 2001, in which New Hampshire asserted that the island lay within the borders of New Hampshire. The State of New Hampshire brought suit against Maine in the
Supreme Court In most legal jurisdictions, a supreme court, also known as a court of last resort, apex court, high (or final) court of appeal, and court of final appeal, is the highest court within the hierarchy of courts. Broadly speaking, the decisions of ...
, but the Supreme Court held that New Hampshire was
estopped Estoppel is a judicial device whereby a court may prevent or "estop" a person from making assertions or from going back on their word. The person barred from doing so is said to be "estopped". Estoppel may prevent someone from bringing a particul ...
from contesting a previous 1977 boundary determination that Maine had jurisdiction over the island, and dismissed the Complaint.''New Hampshire v. Maine'' (U.S. 2002)
(holding New Hampshire estopped from re-litigating 1977 consent judgment confirming Maine's ownership.)


Sites of interest

* Portsmouth Naval Shipyard Museum (Building 31)


See also

* Portsmouth Athenaeum *
List of islands of Maine Maine is home to over 4,600 coastal islands, ranging from large landmasses like Mount Desert Island to small islets and ledges exposed above mean high tide. The Maine Coastal Island Registry (CIR) The Maine Coastal Island Registry (CIR) ca ...


References


External links


History of the Portsmouth Naval Shipyard




from American Forts Network {{authority control Islands of York County, Maine National Register of Historic Places in Maine Military installations in Maine History of Maine Kittery, Maine National Register of Historic Places in York County, Maine Islands of Maine