Blue Marsh Dam
E675607
Blue Marsh Dam is an earthen dam in Berks County, Pennsylvania, built by the U.S. Army Corps of Engineers for flood control, recreation, and water supply on Tulpehocken Creek.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Blue Marsh Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7573083 — 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: Blue Marsh Dam Context triple: [Tulpehocken Creek, hasDam, Blue Marsh Dam]
-
A.
Merwin Dam
Merwin Dam is a hydroelectric dam on Washington State’s Lewis River that forms Lake Merwin and generates power for the region.
-
B.
Silver Lake Dam
Silver Lake Dam is a hydroelectric and flood-control structure on Michigan’s Dead River that helps regulate water flow and levels in the surrounding region.
-
C.
Wyman Dam
Wyman Dam is a hydroelectric dam in Maine that impounds the Kennebec River to form Wyman Lake and generate power.
-
D.
Wyman Dam
Wyman Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow regulation.
-
E.
Tuckertown Dam
Tuckertown Dam is a hydroelectric dam on the Yadkin River in North Carolina that forms Tuckertown Reservoir as part of a series of power-generating dams along the river.
- 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: Blue Marsh Dam Target entity description: Blue Marsh Dam is an earthen dam in Berks County, Pennsylvania, built by the U.S. Army Corps of Engineers for flood control, recreation, and water supply on Tulpehocken Creek.
-
A.
Merwin Dam
Merwin Dam is a hydroelectric dam on Washington State’s Lewis River that forms Lake Merwin and generates power for the region.
-
B.
Silver Lake Dam
Silver Lake Dam is a hydroelectric and flood-control structure on Michigan’s Dead River that helps regulate water flow and levels in the surrounding region.
-
C.
Wyman Dam
Wyman Dam is a hydroelectric dam in Maine that impounds the Kennebec River to form Wyman Lake and generate power.
-
D.
Wyman Dam
Wyman Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow regulation.
-
E.
Tuckertown Dam
Tuckertown Dam is a hydroelectric dam on the Yadkin River in North Carolina that forms Tuckertown Reservoir as part of a series of power-generating dams along the river.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
earthen dam
ⓘ
flood control structure ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| catchmentArea | 175 square miles ⓘ |
| constructionBegan | 1974 ⓘ |
| constructionCost | $63,000,000 ⓘ |
| constructionMaterial | earthfill ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createsReservoir | Blue Marsh Lake NERFINISHED ⓘ |
| hasNearbyLandUse |
agricultural land
ⓘ
suburban development ⓘ |
| hasRecreationalActivity |
boating
ⓘ
fishing ⓘ hiking ⓘ swimming ⓘ |
| hasRecreationalFacility |
boat launches
ⓘ
swim beach ⓘ trails ⓘ |
| hasSpillwayType | concrete chute spillway ⓘ |
| height | 98 feet ⓘ |
| impounds | Tulpehocken Creek NERFINISHED ⓘ |
| inflow | Tulpehocken Creek NERFINISHED ⓘ |
| length | 1,775 feet ⓘ |
| locatedIn |
Berks County, Pennsylvania
NERFINISHED
ⓘ
Pennsylvania ⓘ Tulpehocken Creek watershed NERFINISHED ⓘ |
| locatedInProtectedArea | Blue Marsh Lake recreation area NERFINISHED ⓘ |
| locatedNear | Reading, Pennsylvania NERFINISHED ⓘ |
| locatedUpstreamOf | Reading, Pennsylvania NERFINISHED ⓘ |
| managesFloodRiskFor | Schuylkill River NERFINISHED ⓘ |
| managingAgency | U.S. Army Corps of Engineers Philadelphia District NERFINISHED ⓘ |
| nearCity |
Bernville, Pennsylvania
NERFINISHED
ⓘ
Leesport, Pennsylvania NERFINISHED ⓘ |
| openingDate | 1979 ⓘ |
| operator | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| outflow | Tulpehocken Creek NERFINISHED ⓘ |
| owner | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| partOfProject | Tulpehocken Creek flood control project ⓘ |
| providesService |
downstream flood protection
ⓘ
industrial water supply ⓘ municipal water supply ⓘ water-based recreation ⓘ |
| purpose |
flood control
ⓘ
recreation ⓘ water supply ⓘ |
| regionServed | Schuylkill River basin NERFINISHED ⓘ |
| reservoirCapacity | 50,010 acre-feet ⓘ |
| reservoirName | Blue Marsh Lake NERFINISHED ⓘ |
| riverCrossed | Tulpehocken Creek 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: Blue Marsh Dam Description of subject: Blue Marsh Dam is an earthen dam in Berks County, Pennsylvania, built by the U.S. Army Corps of Engineers for flood control, recreation, and water supply on Tulpehocken Creek.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.