Shepaug Dam
E895420
Shepaug Dam is a hydroelectric dam on the Shepaug River in Connecticut, known for its power generation and as a popular winter bald eagle viewing site.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Shepaug Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10942389 — 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: Shepaug Dam Context triple: [Shepaug River, near, Shepaug Dam]
-
A.
Watertown Dam
Watertown Dam is a historic low-head dam on the Charles River in Watertown, Massachusetts, that once powered local industry and now helps regulate river flow and fish passage.
-
B.
Aspetuck Reservoir
Aspetuck Reservoir is a man-made water body in Fairfield County, Connecticut, serving as a local water supply and recreational area within the town of Easton.
-
C.
Pascoag Reservoir
Pascoag Reservoir is a man-made lake in Burrillville, Rhode Island, popular for recreational activities such as boating and fishing.
-
D.
Yale Dam
Yale Dam is a hydroelectric dam on Washington State’s Lewis River that forms Yale Lake and helps generate power and manage water resources in the region.
-
E.
Amoskeag Dam
Amoskeag Dam is a hydroelectric dam on the Merrimack River in Manchester, New Hampshire, built to harness the power of Amoskeag Falls for industrial and energy production.
- 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: Shepaug Dam Target entity description: Shepaug Dam is a hydroelectric dam on the Shepaug River in Connecticut, known for its power generation and as a popular winter bald eagle viewing site.
-
A.
Watertown Dam
Watertown Dam is a historic low-head dam on the Charles River in Watertown, Massachusetts, that once powered local industry and now helps regulate river flow and fish passage.
-
B.
Aspetuck Reservoir
Aspetuck Reservoir is a man-made water body in Fairfield County, Connecticut, serving as a local water supply and recreational area within the town of Easton.
-
C.
Pascoag Reservoir
Pascoag Reservoir is a man-made lake in Burrillville, Rhode Island, popular for recreational activities such as boating and fishing.
-
D.
Yale Dam
Yale Dam is a hydroelectric dam on Washington State’s Lewis River that forms Yale Lake and helps generate power and manage water resources in the region.
-
E.
Amoskeag Dam
Amoskeag Dam is a hydroelectric dam on the Merrimack River in Manchester, New Hampshire, built to harness the power of Amoskeag Falls for industrial and energy production.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
gravity dam
ⓘ
hydroelectric dam ⓘ |
| constructionCompleted | 1955 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createsReservoir | Lake Lillinonah NERFINISHED ⓘ |
| crosses | Shepaug River NERFINISHED ⓘ |
| downstreamFrom | Shepaug River NERFINISHED ⓘ |
| energySource | hydropower ⓘ |
| gridConnection | New England power grid NERFINISHED ⓘ |
| hasNearbyFacility | Shepaug Eagle Observation Area parking lot NERFINISHED ⓘ |
| hasPart | Shepaug Hydroelectric Station NERFINISHED ⓘ |
| hasPowerhouse | yes ⓘ |
| hasSpillway | yes ⓘ |
| hasWildlifeViewingArea | Shepaug Eagle Observation Area NERFINISHED ⓘ |
| height | approximately 140 feet ⓘ |
| inBasinCountry | United States NERFINISHED ⓘ |
| isPartOf | Housatonic River watershed NERFINISHED ⓘ |
| knownFor |
bald eagle winter viewing
ⓘ
hydroelectric power production ⓘ |
| length | approximately 1,412 feet ⓘ |
| locatedIn |
Connecticut
ⓘ
Litchfield County, Connecticut NERFINISHED ⓘ Northeast United States NERFINISHED ⓘ |
| locatedNear | Housatonic River NERFINISHED ⓘ |
| locatedOnRiver | Shepaug River NERFINISHED ⓘ |
| managedBy | FirstLight Power Resources NERFINISHED ⓘ |
| near |
Newtown, Connecticut
NERFINISHED
ⓘ
Roxbury, Connecticut NERFINISHED ⓘ Southbury, Connecticut NERFINISHED ⓘ |
| notableSpeciesObserved |
bald eagle
GENERATED
ⓘ
waterfowl GENERATED ⓘ |
| numberOfTurbines | 2 ⓘ |
| openingYear | 1955 ⓘ |
| operatedBy | Eversource Energy NERFINISHED ⓘ |
| ownedBy |
Connecticut Light and Power Company
NERFINISHED
ⓘ
Eversource Energy NERFINISHED ⓘ |
| plantCapacity | approximately 42 megawatts ⓘ |
| purpose |
hydroelectric power generation
ⓘ
recreation ⓘ |
| recreationActivity |
birdwatching
ⓘ
boating on Lake Lillinonah ⓘ fishing ⓘ |
| region | New England NERFINISHED ⓘ |
| reservoirName | Lake Lillinonah NERFINISHED ⓘ |
| status | operational ⓘ |
| turbineType | Francis turbine ⓘ |
| upstreamReservoir | Lake Lillinonah NERFINISHED ⓘ |
| watercourse | Shepaug River NERFINISHED ⓘ |
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: Shepaug Dam Description of subject: Shepaug Dam is a hydroelectric dam on the Shepaug River in Connecticut, known for its power generation and as a popular winter bald eagle viewing site.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.