Quabbin Reservoir
E185952
Quabbin Reservoir is a large man-made lake in central Massachusetts that serves as one of the primary drinking water sources for the Boston metropolitan area and is surrounded by protected forest and wildlife habitat.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Quabbin Reservoir canonical | 21 |
| Quabbin Reservoir dam | 2 |
| Quabbin–Wachusett water system | 2 |
| Quabbin Reservoir intake works | 1 |
| Quabbin Reservoir water supply system | 1 |
| shoreline of Quabbin Reservoir | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1608124 — 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: Quabbin Reservoir Context triple: [Quabbin Reservoir region, contains, Quabbin Reservoir]
-
A.
Wachusett Reservoir
Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
-
B.
Lake Quinsigamond
Lake Quinsigamond is a long, narrow lake in central Massachusetts known for recreational boating, fishing, and its historic rowing regattas.
-
C.
Malden Reservoir
Malden Reservoir is a man-made water body in Massachusetts that serves as a local water supply and recreational resource within the greater Boston area.
-
D.
Leverett Pond
Leverett Pond is a scenic urban pond in Boston, Massachusetts, that forms part of the Emerald Necklace park system designed by Frederick Law Olmsted.
-
E.
Wakeby Pond
Wakeby Pond is a freshwater lake on Cape Cod in Mashpee, Massachusetts, known for recreational activities like fishing, boating, and swimming.
- 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: Quabbin Reservoir Target entity description: Quabbin Reservoir is a large man-made lake in central Massachusetts that serves as one of the primary drinking water sources for the Boston metropolitan area and is surrounded by protected forest and wildlife habitat.
-
A.
Wachusett Reservoir
Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
-
B.
Lake Quinsigamond
Lake Quinsigamond is a long, narrow lake in central Massachusetts known for recreational boating, fishing, and its historic rowing regattas.
-
C.
Malden Reservoir
Malden Reservoir is a man-made water body in Massachusetts that serves as a local water supply and recreational resource within the greater Boston area.
-
D.
Leverett Pond
Leverett Pond is a scenic urban pond in Boston, Massachusetts, that forms part of the Emerald Necklace park system designed by Frederick Law Olmsted.
-
E.
Wakeby Pond
Wakeby Pond is a freshwater lake on Cape Cod in Mashpee, Massachusetts, known for recreational activities like fishing, boating, and swimming.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
drinking water reservoir ⓘ reservoir ⓘ |
| completedIn | 1939 ⓘ |
| constructionBegan | 1930s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| createdBy |
construction of Goodnough Dike
ⓘ
construction of Winsor Dam ⓘ damming of the Swift River ⓘ |
| drainageBasin |
Connecticut River basin
ⓘ
linked to:
Connecticut River watershed
|
| hasFacility | Quabbin Visitor Center ⓘ |
| inflow |
Swift River
NERFINISHED
ⓘ
Ware River (diversion) ⓘ |
| knownFor |
high-quality drinking water
ⓘ
restricted public access ⓘ |
| locatedIn |
Franklin County, Massachusetts
ⓘ
Hampden County, Massachusetts ⓘ Hampshire County, Massachusetts ⓘ Massachusetts ⓘ New England ⓘ Swift River Valley ⓘ Worcester County, Massachusetts ⓘ |
| managedBy | Massachusetts Water Resources Authority ⓘ |
| maximumDepth | over 150 feet ⓘ |
| near |
Belchertown, Massachusetts
NERFINISHED
ⓘ
Petersham, Massachusetts ⓘ Ware, Massachusetts NERFINISHED ⓘ |
| operatedBy | Massachusetts Water Resources Authority ⓘ |
| outflow |
Quabbin Aqueduct
ⓘ
Swift River (controlled releases) ⓘ |
| partOf | Massachusetts public water supply system ⓘ |
| primaryUse | municipal water supply ⓘ |
| protectedArea | Quabbin Reservation ⓘ |
| recreation |
fishing (by permit)
ⓘ
hiking (in designated areas) ⓘ wildlife viewing ⓘ |
| submergedSettlement |
Dana, Massachusetts
ⓘ
Enfield, Massachusetts NERFINISHED ⓘ Greenwich, Massachusetts NERFINISHED ⓘ Prescott, Massachusetts ⓘ |
| suppliesWaterTo |
Boston
ⓘ
linked to:
Boston, Massachusetts
Boston metropolitan area ⓘ
linked to:
Greater Boston
eastern Massachusetts communities ⓘ |
| surfaceArea |
about 25,600 hectares
ⓘ
about 40,000 acres ⓘ about 99 square miles ⓘ |
| surroundedBy |
protected forest land
ⓘ
wildlife habitat ⓘ |
| volume |
about 1.56 cubic kilometres
ⓘ
about 412 billion US gallons ⓘ |
| waterSystem | MWRA water system ⓘ |
| wildlife |
bald eagles
ⓘ
black bears ⓘ moose ⓘ white-tailed deer ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Quabbin Reservoir Description of subject: Quabbin Reservoir is a large man-made lake in central Massachusetts that serves as one of the primary drinking water sources for the Boston metropolitan area and is surrounded by protected forest and wildlife habitat.
Referenced by (28)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Quabbin Reservoir
linked to: Quabbin Reservoir
subject linked to:
Greenwich, Massachusetts, United States
subject linked to:
Greenwich, Massachusetts, United States
linked to: Quabbin Reservoir
linked to: Quabbin Reservoir
linked to: Quabbin Reservoir
linked to: Quabbin Reservoir
linked to: Quabbin Reservoir