House Island (Casco Bay)

E668735

island

House Island (Casco Bay) is a small privately owned island in Portland Harbor, Maine, historically known for its coastal fortifications and use as an immigration quarantine station.

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All labels observed (3)

Label	Occurrences
House Island (Casco Bay) canonical	1
House Island, Casco Bay	1
House Island, Portland Harbor	1

How this entity was disambiguated

This entity first appeared as the object of triple T7470885 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: House Island (Casco Bay)
Context triple: [Casco Bay islands, hasPart, House Island (Casco Bay)]

A. Westport Island, Maine
Westport Island, Maine is a small coastal town situated on an island in Lincoln County known for its scenic waterfront, rural character, and maritime heritage.
B. Chebeague Island, Maine
Chebeague Island, Maine is a small island community in Casco Bay known for its coastal scenery, historic fishing and lobstering heritage, and role as a seasonal and year-round residential destination.
C. Swan’s Island, Maine
Swan’s Island, Maine is a small, remote island community off the coast of Hancock County known for its fishing heritage, quiet natural beauty, and reliance on ferry access to the mainland.
D. Indian Island, Maine
Indian Island, Maine is the primary reservation and community center of the Penobscot Nation, located in the Penobscot River in central Maine.
E. Casco Bay islands
The Casco Bay islands are a scenic group of islands off the coast of Portland, Maine, known for their rugged shorelines, lighthouses, and recreational boating and fishing opportunities.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: House Island (Casco Bay)
Target entity description: House Island (Casco Bay) is a small privately owned island in Portland Harbor, Maine, historically known for its coastal fortifications and use as an immigration quarantine station.

A. Westport Island, Maine
Westport Island, Maine is a small coastal town situated on an island in Lincoln County known for its scenic waterfront, rural character, and maritime heritage.
B. Chebeague Island, Maine
Chebeague Island, Maine is a small island community in Casco Bay known for its coastal scenery, historic fishing and lobstering heritage, and role as a seasonal and year-round residential destination.
C. Swan’s Island, Maine
Swan’s Island, Maine is a small, remote island community off the coast of Hancock County known for its fishing heritage, quiet natural beauty, and reliance on ferry access to the mainland.
D. Indian Island, Maine
Indian Island, Maine is the primary reservation and community center of the Penobscot Nation, located in the Penobscot River in central Maine.
E. Casco Bay islands
The Casco Bay islands are a scenic group of islands off the coast of Portland, Maine, known for their rugged shorelines, lighthouses, and recreational boating and fishing opportunities.
F. None of above. chosen

Statements (45)

Predicate	Object
instanceOf	island ⓘ
administeredBy	City of Portland (jurisdiction) ⓘ linked to: Portland, Oregon, United States
bodyOfWater	Atlantic Ocean ⓘ
country	United States ⓘ linked to: United States of America
hasAccess	boat only ⓘ
hasAlternativeName	House Island, Portland Harbor ⓘ linked to: House Island (Casco Bay)
hasArea	approximately 12 acres ⓘ
hasFeature	historic military structures ⓘ rocky shoreline ⓘ wooded interior ⓘ
hasFortification	Fort Scammel ⓘ
hasFortificationType	coastal fort ⓘ
hasHarbor	Portland Harbor ⓘ
hasHistoricalFunction	military defense site ⓘ quarantine station for immigrants ⓘ
hasHistoricalPeriod	19th century coastal defense ⓘ early 20th century immigration quarantine ⓘ
hasHistoricSignificance	part of U.S. coastal defense system ⓘ regional immigration processing site ⓘ
hasHistoricUse	inspection of arriving immigrants ⓘ quarantine of arriving immigrants ⓘ
hasMilitaryAssociation	United States Army ⓘ
hasName	House Island ⓘ
hasNearbyIsland	Cushing Island ⓘ Great Diamond Island ⓘ Little Diamond Island ⓘ Peaks Island ⓘ
hasStructure	Fort Scammel ⓘ
hasUse	immigration quarantine station ⓘ site of coastal fortifications ⓘ
hasViewOf	Portland Head Light ⓘ Portland skyline ⓘ
locatedIn	Casco Bay ⓘ Cumberland County, Maine ⓘ Maine ⓘ Portland Harbor ⓘ Portland, Maine ⓘ United States ⓘ linked to: United States of America
nearbyCity	Portland, Maine ⓘ
ownershipStatus	privately owned ⓘ
partOf	Casco Bay islands ⓘ defenses of Portland Harbor ⓘ
region	New England ⓘ
usedFor	private residences ⓘ tourism ⓘ

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Casco Bay islands → hasPart → House Island (Casco Bay) ⓘ

Fort Scammel → locatedOn → House Island, Casco Bay ⓘ

linked to: House Island (Casco Bay)

House Island (Casco Bay) → hasAlternativeName → House Island, Portland Harbor ⓘ