Pacoima Wash
E908076
Pacoima Wash is a tributary stream in the northeastern San Fernando Valley of Los Angeles County, California, that channels runoff from the San Gabriel Mountains into the Los Angeles River.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pacoima Diversion Channel | 1 |
| Pacoima Wash canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11137218 — 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: Pacoima Wash Context triple: [Pacoima, namedAfter, Pacoima Wash]
-
A.
Verdugo Wash
Verdugo Wash is a concrete-lined flood control channel and seasonal stream in Los Angeles County that drains the Verdugo Mountains area before joining the Los Angeles River.
-
B.
San Andreas Creek
San Andreas Creek is a watercourse in San Mateo County, California, that drains the eastern slopes of the Santa Cruz Mountains into the San Andreas Reservoir.
-
C.
Meadow Valley Wash
Meadow Valley Wash is an intermittent stream and drainage system in southeastern Nevada that channels runoff through arid Lincoln County toward the Muddy River.
-
D.
Malibu Creek
Malibu Creek is a scenic waterway in the Santa Monica Mountains of Southern California that flows through rugged canyons to the Pacific Ocean near Malibu.
-
E.
Arroyo Seco
Arroyo Seco is a seasonal river and canyon in Los Angeles County, California, known for its historic role in regional water management, recreation, and as the route followed by the Arroyo Seco Parkway.
- 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: Pacoima Wash Target entity description: Pacoima Wash is a tributary stream in the northeastern San Fernando Valley of Los Angeles County, California, that channels runoff from the San Gabriel Mountains into the Los Angeles River.
-
A.
Verdugo Wash
Verdugo Wash is a concrete-lined flood control channel and seasonal stream in Los Angeles County that drains the Verdugo Mountains area before joining the Los Angeles River.
-
B.
San Andreas Creek
San Andreas Creek is a watercourse in San Mateo County, California, that drains the eastern slopes of the Santa Cruz Mountains into the San Andreas Reservoir.
-
C.
Meadow Valley Wash
Meadow Valley Wash is an intermittent stream and drainage system in southeastern Nevada that channels runoff through arid Lincoln County toward the Muddy River.
-
D.
Malibu Creek
Malibu Creek is a scenic waterway in the Santa Monica Mountains of Southern California that flows through rugged canyons to the Pacific Ocean near Malibu.
-
E.
Arroyo Seco
Arroyo Seco is a seasonal river and canyon in Los Angeles County, California, known for its historic role in regional water management, recreation, and as the route followed by the Arroyo Seco Parkway.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
river
ⓘ
tributary stream ⓘ |
| adjacentTo |
industrial areas in the San Fernando Valley
ⓘ
residential neighborhoods of Pacoima ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses |
Interstate 405 in the San Fernando Valley
ⓘ
Interstate 5 in the San Fernando Valley ⓘ U.S. Route 101 in the San Fernando Valley ⓘ |
| drainsFrom | San Gabriel Mountains ⓘ |
| environmentalConcern |
habitat fragmentation
ⓘ
water quality degradation ⓘ |
| flowsThrough |
Arleta, Los Angeles
ⓘ
linked to:
Arleta, Los Angeles, California
Pacoima, Los Angeles ⓘ
linked to:
Pacoima neighborhood of Los Angeles
Panorama City, Los Angeles ⓘ
linked to:
Panorama City
Studio City, Los Angeles ⓘ Valley Glen, Los Angeles ⓘ
linked to:
Valley Glen
Van Nuys, Los Angeles ⓘ
linked to:
Van Nuys, California
|
| hasBridge |
Coldwater Canyon Avenue bridge
ⓘ
Laurel Canyon Boulevard bridge ⓘ Van Nuys Boulevard bridge ⓘ |
| hasPart |
Pacoima Diversion Channel
ⓘ
linked to:
Pacoima Wash
concrete-lined flood control channel ⓘ |
| hasRecreationProject |
Pacoima Wash Greenway
ⓘ
multi-use bike and pedestrian paths ⓘ |
| locatedIn |
City of Los Angeles
ⓘ
linked to:
Los Angeles
Los Angeles County, California ⓘ
linked to:
Los Angeles County
Los Angeles metropolitan area ⓘ
linked to:
Greater Los Angeles Area
San Fernando Valley ⓘ northeastern San Fernando Valley ⓘ |
| locatedInTimeZone | Pacific Time Zone ⓘ |
| managedBy | Los Angeles County Flood Control District ⓘ |
| mouthLocation |
Los Angeles River
ⓘ
Studio City, Los Angeles ⓘ |
| near |
Pacoima Dam
ⓘ
linked to:
Santa Fe Dam
Pacoima Reservoir ⓘ |
| partOf |
Los Angeles River system
ⓘ
linked to:
Los Angeles River
San Fernando Valley drainage system ⓘ |
| region | Southern California ⓘ |
| sourceRegion |
Angeles National Forest vicinity
ⓘ
linked to:
Angeles National Forest
San Gabriel Mountains foothills ⓘ |
| subjectTo |
flash flooding risk
ⓘ
urban runoff pollution ⓘ |
| tributaryOf | Los Angeles River ⓘ |
| use |
flood control
ⓘ
stormwater conveyance ⓘ |
| watercourse |
Los Angeles River watershed
ⓘ
linked to:
Los Angeles 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: Pacoima Wash Description of subject: Pacoima Wash is a tributary stream in the northeastern San Fernando Valley of Los Angeles County, California, that channels runoff from the San Gabriel Mountains into the Los Angeles River.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Pacoima Wash