Great Stone Dam
E34306
The Great Stone Dam is a historic 19th-century granite dam in Lawrence, Massachusetts, built to harness the Merrimack River for industrial waterpower and central to the city’s mill-era development.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Great Stone Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T90100 — 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: Great Stone Dam Context triple: [Lawrence, hasLandmark, Great Stone Dam]
-
A.
Croton Falls Dam
Croton Falls Dam is a masonry gravity dam in Westchester County, New York, that forms the Croton Falls Reservoir as part of New York City’s water supply system.
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B.
New Croton Dam
New Croton Dam is a large masonry gravity dam in New York that forms the New Croton Reservoir, a key component of New York City’s water supply system.
-
C.
Croton Falls Reservoir
Croton Falls Reservoir is a man-made lake in Westchester County, New York, that serves as part of New York City's Croton water supply system.
-
D.
Snake Dike
Snake Dike is a classic, runout slab and dike rock climbing route on the southwest face of Half Dome in Yosemite National Park.
-
E.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
- 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: Great Stone Dam Target entity description: The Great Stone Dam is a historic 19th-century granite dam in Lawrence, Massachusetts, built to harness the Merrimack River for industrial waterpower and central to the city’s mill-era development.
-
A.
Croton Falls Dam
Croton Falls Dam is a masonry gravity dam in Westchester County, New York, that forms the Croton Falls Reservoir as part of New York City’s water supply system.
-
B.
New Croton Dam
New Croton Dam is a large masonry gravity dam in New York that forms the New Croton Reservoir, a key component of New York City’s water supply system.
-
C.
Croton Falls Reservoir
Croton Falls Reservoir is a man-made lake in Westchester County, New York, that serves as part of New York City's Croton water supply system.
-
D.
Snake Dike
Snake Dike is a classic, runout slab and dike rock climbing route on the southwest face of Half Dome in Yosemite National Park.
-
E.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
granite dam
ⓘ
gravity dam ⓘ historic structure ⓘ industrial heritage site ⓘ |
| architecturalStyle | 19th-century industrial engineering ⓘ |
| associatedWith |
Lawrence textile mills
ⓘ
Merrimack Valley ⓘ
surface form:
Merrimack Valley industrial corridor
|
| associatedWithIndustry |
other water-powered mills
ⓘ
paper manufacturing ⓘ textile manufacturing ⓘ |
| builtFor | Essex Company ⓘ |
| completedIn | 1848 ⓘ |
| constructionTechnique | cut-stone masonry ⓘ |
| country | United States of America ⓘ |
| crosses | Merrimack River ⓘ |
| era |
Industrial Revolution
ⓘ
surface form:
American Industrial Revolution
|
| feeds |
North Canal (Lawrence, Massachusetts)
ⓘ
North Canal (Lawrence, Massachusetts) ⓘ
surface form:
South Canal (Lawrence, Massachusetts)
|
| function |
impoundment of Merrimack River
ⓘ
regulation of water flow to power canals ⓘ |
| heritageDesignation | listed on the National Register of Historic Places ⓘ |
| heritageStatus | preserved as a historic engineering work ⓘ |
| historicalRole | enabled planned industrial city model in Lawrence ⓘ |
| inception | 1840s ⓘ |
| locatedOnWaterway | Merrimack River ⓘ |
| location |
Lawrence, Massachusetts, United States
ⓘ
surface form:
Lawrence, Massachusetts
|
| materialUsed | granite ⓘ |
| near | Lawrence city center ⓘ |
| notableFor |
role in canal-based power distribution system in Lawrence
ⓘ
scale of 19th-century stone dam construction ⓘ |
| owner |
Lawrence, Massachusetts, United States
ⓘ
surface form:
City of Lawrence (historically via Essex Company and successors)
|
| partOf | Lawrence industrial historic landscape ⓘ |
| purpose |
hydropower generation
ⓘ
industrial waterpower ⓘ |
| region | Essex County, Massachusetts ⓘ |
| significance |
central to the mill-era development of Lawrence
ⓘ
one of the earliest large-scale granite dams in the United States ⓘ |
| significantEvent | development of Lawrence as a planned industrial city ⓘ |
| significantPeriod | 19th century ⓘ |
| tourism | local historic attraction ⓘ |
| usedFor | powering mill complexes along the Merrimack River ⓘ |
| watercourse | Merrimack River ⓘ |
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: Great Stone Dam Description of subject: The Great Stone Dam is a historic 19th-century granite dam in Lawrence, Massachusetts, built to harness the Merrimack River for industrial waterpower and central to the city’s mill-era development.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Lawrence, Massachusetts