Columbia South Shore Well Field
E49796
The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Columbia South Shore Well Field canonical | 1 |
| Portland Columbia South Shore Well Field | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T394918 — 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: Columbia South Shore Well Field Context triple: [Portland Water Bureau, usesWaterSource, Columbia South Shore Well Field]
-
A.
New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
-
B.
Middle Branch Reservoir
Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
-
C.
East Branch Reservoir
East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
-
D.
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.
-
E.
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.
- 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: Columbia South Shore Well Field Target entity description: The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
-
A.
New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
-
B.
Middle Branch Reservoir
Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
-
C.
East Branch Reservoir
East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
drinking water supply system
ⓘ
groundwater well field ⓘ |
| aquiferType |
alluvial aquifer
ⓘ
basalt aquifer ⓘ |
| connectedTo | Portland distribution system ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| function |
ensure reliability of Portland water supply
ⓘ
provide redundancy for surface water system ⓘ |
| hasInfrastructureType |
high-capacity production wells
ⓘ
municipal groundwater wells ⓘ |
| hasManagementPlan |
groundwater protection plan
ⓘ
source water protection plan ⓘ |
| hasPart |
monitoring wells
ⓘ
municipal production wells ⓘ pumping facilities ⓘ transmission mains ⓘ |
| hasProtectionArea | wellhead protection area ⓘ |
| locatedIn |
Columbia South Shore area of Portland
ⓘ
Multnomah County ⓘ
surface form:
Multnomah County, Oregon
Portland, Oregon, United States ⓘ
surface form:
Portland, Oregon
|
| locatedNear | Columbia River ⓘ |
| monitoredBy |
Portland Water Bureau
ⓘ
surface form:
Portland Water Bureau water quality laboratory
|
| near | Portland International Airport ⓘ |
| operatedBy | Portland Water Bureau ⓘ |
| ownedBy |
Portland
ⓘ
surface form:
City of Portland
|
| partOf |
Portland Water Bureau
ⓘ
surface form:
Portland Water Bureau supply system
|
| primaryRole |
backup to primary surface water supply
ⓘ
supplement to primary surface water supply ⓘ |
| primarySurfaceSupply | Bull Run Watershed ⓘ |
| region | Pacific Northwest ⓘ |
| regulatingAuthority |
Oregon Department of Environmental Quality
ⓘ
Oregon Health Authority ⓘ |
| riskManagement | contamination prevention ⓘ |
| serves |
Portland, Oregon, United States
ⓘ
surface form:
City of Portland, Oregon
Portland metropolitan area ⓘ |
| state | Oregon ⓘ |
| subjectTo |
drinking water quality standards
ⓘ
groundwater protection regulations ⓘ |
| use |
emergency water supply
ⓘ
municipal drinking water supply ⓘ supplemental water supply ⓘ |
| waterSourceType | groundwater ⓘ |
| waterType | treated groundwater ⓘ |
| waterUse |
drought supply
ⓘ
emergency outage backup ⓘ peak demand augmentation ⓘ potable water ⓘ |
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: Columbia South Shore Well Field Description of subject: The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Columbia South Shore
this entity surface form:
Portland Columbia South Shore Well Field