Wachusett Reservoir
E109585
Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Wachusett Reservoir canonical | 22 |
| Wachusett Dam | 1 |
| Wachusett Reservoir area | 1 |
| Wachusett Reservoir system | 1 |
| Wachusett Reservoir watershed area | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T720347 — 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: Wachusett Reservoir Context triple: [Massachusetts Water Resources Authority, usesWaterSource, Wachusett Reservoir]
-
A.
Walden Pond (Lynn)
Walden Pond (Lynn) is a scenic pond within the Lynn Woods Reservation in Lynn, Massachusetts, known for its natural beauty and recreational use.
-
B.
Wakeby Pond
Wakeby Pond is a freshwater lake on Cape Cod in Mashpee, Massachusetts, known for recreational activities like fishing, boating, and swimming.
-
C.
Ashokan Reservoir
Ashokan Reservoir is a major New York City water supply reservoir located in the Catskill Mountains of Ulster County, New York.
-
D.
Fresh Pond
Fresh Pond is a large freshwater reservoir and surrounding parkland in Cambridge, Massachusetts, known for its walking trails, wildlife, and role in the city's water supply.
-
E.
Mashpee Pond
Mashpee Pond is a freshwater lake in the town of Mashpee on Cape Cod, Massachusetts, known for recreation such as 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: Wachusett Reservoir Target entity description: Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
-
A.
Walden Pond (Lynn)
Walden Pond (Lynn) is a scenic pond within the Lynn Woods Reservation in Lynn, Massachusetts, known for its natural beauty and recreational use.
-
B.
Wakeby Pond
Wakeby Pond is a freshwater lake on Cape Cod in Mashpee, Massachusetts, known for recreational activities like fishing, boating, and swimming.
-
C.
Ashokan Reservoir
Ashokan Reservoir is a major New York City water supply reservoir located in the Catskill Mountains of Ulster County, New York.
-
D.
Fresh Pond
Fresh Pond is a large freshwater reservoir and surrounding parkland in Cambridge, Massachusetts, known for its walking trails, wildlife, and role in the city's water supply.
-
E.
Mashpee Pond
Mashpee Pond is a freshwater lake in the town of Mashpee on Cape Cod, Massachusetts, known for recreation such as fishing, boating, and swimming.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
man-made lake
ⓘ
reservoir ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| completedIn | 1905 ⓘ |
| connectedBy | Quabbin Aqueduct ⓘ |
| connectedTo | Quabbin Reservoir ⓘ |
| constructionBegan | 1897 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| createdBy | damming of Nashua River tributaries ⓘ |
| elevation |
approximately 120 meters above sea level
ⓘ
approximately 395 feet above sea level ⓘ |
| hasStructure | Old Stone Church (on its shore) ⓘ |
| historicalImpact |
displacement of local communities
ⓘ
partial flooding of the town of West Boylston ⓘ |
| inflow |
Nashua River
ⓘ
Quinapoxet River ⓘ Stillwater River ⓘ |
| locatedIn |
Boylston, Massachusetts
ⓘ
Clinton, Massachusetts ⓘ Massachusetts ⓘ Sterling, Massachusetts ⓘ West Boylston, Massachusetts ⓘ
linked to:
West Boylston
Worcester County, Massachusetts ⓘ |
| locatedInRegion | central Massachusetts ⓘ |
| managedBy |
Massachusetts Department of Conservation and Recreation
ⓘ
Massachusetts Water Resources Authority ⓘ |
| maximumDepth |
approximately 120 feet
ⓘ
approximately 37 meters ⓘ |
| nearbyLandmark | Mount Wachusett ⓘ |
| opened | 1908 ⓘ |
| outflow |
Cosgrove Tunnel
ⓘ
Wachusett Aqueduct ⓘ |
| ownedBy |
Commonwealth of Massachusetts
ⓘ
linked to:
Massachusetts
|
| partOf |
Boston metropolitan water system
ⓘ
linked to:
Massachusetts Water Resources Authority
Massachusetts public water supply system ⓘ |
| primaryUse | drinking water supply ⓘ |
| recreationRestrictions |
limited shoreline access
ⓘ
no boating in most areas ⓘ no swimming allowed ⓘ |
| suppliesWaterTo |
Greater Boston
ⓘ
Metropolitan Boston ⓘ
linked to:
Greater Boston
|
| surfaceArea |
approximately 16 square kilometers
ⓘ
approximately 6.2 square miles ⓘ |
| waterQuality | unfiltered drinking water supply ⓘ |
| waterSourceFor |
Boston
ⓘ
linked to:
Boston, Massachusetts
eastern Massachusetts communities ⓘ |
| waterVolume |
approximately 246 million cubic meters
ⓘ
approximately 65 billion US gallons ⓘ |
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: Wachusett Reservoir Description of subject: Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
Referenced by (26)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Clinton
subject linked to:
Clinton
linked to: Wachusett Reservoir
subject linked to:
Clinton, Massachusetts, United States
linked to: Wachusett Reservoir
linked to: Wachusett Reservoir
linked to: Wachusett Reservoir
subject linked to:
Stillwater River
subject linked to:
Stillwater River
subject linked to:
Stillwater River
subject linked to:
Interstate 190