Seven Oaks Dam
E618818
Seven Oaks Dam is a large flood-control and water-conservation dam located in the San Bernardino Mountains of Southern California.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seven Oaks Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T6659555 — 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: Seven Oaks Dam Context triple: [Santa Ana River, hasDam, Seven Oaks Dam]
-
A.
Oak Grove Dam
Oak Grove Dam is a hydroelectric dam located on Oregon’s Clackamas River, used primarily for power generation and water management.
-
B.
Macomb’s Dam
Macomb’s Dam was a historic Harlem River crossing in New York City that preceded and was ultimately superseded by the Macombs Dam Bridge.
-
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.
Fife Brook Dam
Fife Brook Dam is a hydroelectric dam on the Deerfield River in western Massachusetts, known for regulating river flow and supporting popular whitewater recreation downstream.
- 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: Seven Oaks Dam Target entity description: Seven Oaks Dam is a large flood-control and water-conservation dam located in the San Bernardino Mountains of Southern California.
-
A.
Oak Grove Dam
Oak Grove Dam is a hydroelectric dam located on Oregon’s Clackamas River, used primarily for power generation and water management.
-
B.
Macomb’s Dam
Macomb’s Dam was a historic Harlem River crossing in New York City that preceded and was ultimately superseded by the Macombs Dam Bridge.
-
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.
Fife Brook Dam
Fife Brook Dam is a hydroelectric dam on the Deerfield River in western Massachusetts, known for regulating river flow and supporting popular whitewater recreation downstream.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
flood control structure ⓘ water conservation facility ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| benefits |
enhanced water supply reliability
ⓘ
reduced downstream flood damage ⓘ |
| catchmentArea |
176 sq mi
ⓘ
456 km² ⓘ |
| constructionBegan | 1994 ⓘ |
| constructionCost | $450 million ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crestElevation | 2,600 ft above sea level ⓘ |
| crosses | Santa Ana River ⓘ |
| damType |
earth-fill dam
ⓘ
embankment dam ⓘ |
| designedBy |
United States Army Corps of Engineers
ⓘ
linked to:
U.S. Army Corps of Engineers
|
| function |
attenuation of peak flood flows
ⓘ
temporary water storage ⓘ |
| hasSpillway | uncontrolled overflow spillway ⓘ |
| height |
168 m
ⓘ
550 ft ⓘ |
| length |
2,980 ft
ⓘ
908 m ⓘ |
| locatedIn |
San Bernardino County, California
ⓘ
linked to:
San Bernardino County
San Bernardino Mountains ⓘ Southern California ⓘ |
| locatedOn |
upper Santa Ana River
ⓘ
linked to:
Santa Ana River
|
| managesFloodRiskFor |
Santa Ana River watershed
ⓘ
linked to:
Santa Ana River
|
| nearCity |
Highland, California
ⓘ
Mentone, California ⓘ |
| openingDate | 1999 ⓘ |
| operator |
United States Army Corps of Engineers
ⓘ
linked to:
U.S. Army Corps of Engineers
|
| owner |
United States Army Corps of Engineers
ⓘ
linked to:
U.S. Army Corps of Engineers
|
| partOf |
Santa Ana River Mainstem Project
ⓘ
linked to:
Santa Ana River flood control system
|
| partOfFloodControlSystemWith | Prado Dam ⓘ |
| primaryMaterial | earth and rockfill ⓘ |
| protectsArea |
Orange County, California
ⓘ
Riverside County, California ⓘ
linked to:
Riverside County
San Bernardino County, California ⓘ
linked to:
San Bernardino County
|
| purpose |
flood control
ⓘ
groundwater recharge ⓘ water conservation ⓘ |
| region | Inland Empire ⓘ |
| reservoirCapacity | 145,600 acre-feet ⓘ |
| reservoirName | Seven Oaks Reservoir ⓘ |
| riverSystem |
Santa Ana River system
ⓘ
linked to:
Santa Ana River
|
| watershed | Santa Ana River watershed ⓘ |
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: Seven Oaks Dam Description of subject: Seven Oaks Dam is a large flood-control and water-conservation dam located in the San Bernardino Mountains of Southern California.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.