Salem Harbor Power Station
E371841
Salem Harbor Power Station is a former coal- and oil-fired power plant in Salem, Massachusetts, that was a prominent industrial feature of the city’s waterfront before its decommissioning and redevelopment.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Salem Harbor Power Station canonical | 1 |
| Salem Harbor Station natural gas plant | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3584161 — 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: Salem Harbor Power Station Context triple: [Salem Harbor, hasLandmark, Salem Harbor Power Station]
-
A.
Alexander Generating Station
Alexander Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
-
B.
Salem Nuclear Power Plant
Salem Nuclear Power Plant is a commercial nuclear power station in Lower Alloways Creek Township, New Jersey, that generates electricity using pressurized water reactors along the Delaware River.
-
C.
Kingston Fossil Plant
Kingston Fossil Plant is a large coal-fired power plant operated by the Tennessee Valley Authority, known for its significant electricity generation and for a major coal ash spill in 2008.
-
D.
Pickering Nuclear Generating Station
Pickering Nuclear Generating Station is a large Canadian nuclear power plant on the shore of Lake Ontario that has been a major source of electricity for the Greater Toronto Area.
-
E.
Lewiston Pump-Generating Plant
The Lewiston Pump-Generating Plant is a hydroelectric pumped-storage facility near Niagara Falls that works in tandem with the Robert Moses Niagara Power Plant to balance electricity supply and demand.
- 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: Salem Harbor Power Station Target entity description: Salem Harbor Power Station is a former coal- and oil-fired power plant in Salem, Massachusetts, that was a prominent industrial feature of the city’s waterfront before its decommissioning and redevelopment.
-
A.
Alexander Generating Station
Alexander Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
-
B.
Salem Nuclear Power Plant
Salem Nuclear Power Plant is a commercial nuclear power station in Lower Alloways Creek Township, New Jersey, that generates electricity using pressurized water reactors along the Delaware River.
-
C.
Kingston Fossil Plant
Kingston Fossil Plant is a large coal-fired power plant operated by the Tennessee Valley Authority, known for its significant electricity generation and for a major coal ash spill in 2008.
-
D.
Pickering Nuclear Generating Station
Pickering Nuclear Generating Station is a large Canadian nuclear power plant on the shore of Lake Ontario that has been a major source of electricity for the Greater Toronto Area.
-
E.
Lewiston Pump-Generating Plant
The Lewiston Pump-Generating Plant is a hydroelectric pumped-storage facility near Niagara Falls that works in tandem with the Robert Moses Niagara Power Plant to balance electricity supply and demand.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
coal-fired power station
ⓘ
oil-fired power station ⓘ power plant ⓘ |
| category |
Buildings and structures in Salem, Massachusetts
ⓘ
Energy infrastructure completed in the 1950s ⓘ Former coal-fired power stations in the United States ⓘ |
| commissioned |
1951
ⓘ
1952 ⓘ 1958 ⓘ 1960 ⓘ |
| connectsTo | ISO New England ⓘ |
| country | United States of America ⓘ |
| decommissioned | 2014 ⓘ |
| demolished | 2014 ⓘ |
| formerUse | electricity generation ⓘ |
| gridConnection | New England power grid ⓘ |
| gridRole | peaking and baseload generation at different times ⓘ |
| hasPart |
Unit 1
ⓘ
Unit 2 ⓘ Unit 3 ⓘ Unit 4 ⓘ |
| impact |
local air pollution
ⓘ
visual impact on Salem waterfront skyline ⓘ |
| installedCapacity | approximately 745 MW ⓘ |
| locatedIn |
Essex County, Massachusetts
ⓘ
Massachusetts ⓘ Salem, Massachusetts ⓘ |
| locatedInMetropolitanArea | Greater Boston ⓘ |
| locatedOnBodyOfWater |
Atlantic Ocean
ⓘ
Salem Harbor ⓘ |
| notableFor |
coal and oil emissions near residential areas
ⓘ
prominent feature of Salem waterfront ⓘ |
| numberOfUnits | 4 ⓘ |
| operatedBy | Dominion Energy ⓘ |
| ownedBy |
Dominion Energy
ⓘ
Footprint Power ⓘ New England Power Company ⓘ |
| primaryFuel | coal ⓘ |
| redevelopedAs | natural gas-fired power plant ⓘ |
| regulatoryBody |
Massachusetts Department of Environmental Protection
ⓘ
United States Environmental Protection Agency ⓘ
surface form:
U.S. Environmental Protection Agency
|
| replacedBy |
Salem Harbor Power Station
self-linksurface differs
ⓘ
surface form:
Salem Harbor Station natural gas plant
|
| secondaryFuel | fuel oil ⓘ |
| significantEvent |
closure announced in 2011
ⓘ
final shutdown in 2014 ⓘ site redevelopment after demolition ⓘ subject of environmental and air quality concerns ⓘ |
| status | decommissioned ⓘ |
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: Salem Harbor Power Station Description of subject: Salem Harbor Power Station is a former coal- and oil-fired power plant in Salem, Massachusetts, that was a prominent industrial feature of the city’s waterfront before its decommissioning and redevelopment.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Salem Harbor Station natural gas plant