Howard A. Hanson Dam
E744450
Howard A. Hanson Dam is a large flood-control and water-supply dam on Washington State’s Green River that helps protect the Seattle–Tacoma area from flooding and supports regional water needs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Howard A. Hanson Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8033600 — 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: Howard A. Hanson Dam Context triple: [Green River (Washington), hasDam, Howard A. Hanson Dam]
-
A.
R. L. Harris Dam
R. L. Harris Dam is a hydroelectric dam in Alabama that impounds the Tallapoosa River to form Lake Wedowee and generate power.
-
B.
Jim Woodruff Dam
Jim Woodruff Dam is a hydroelectric and flood-control dam on the Apalachicola River at the Florida–Georgia border, forming Lake Seminole and helping regulate water flow in the region.
-
C.
Morris Sheppard Dam
Morris Sheppard Dam is a large hydroelectric and flood-control structure in Texas that impounds the Brazos River to form Possum Kingdom Lake.
-
D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Chatfield Dam
Chatfield Dam is a large flood-control and water-storage structure in Colorado that creates Chatfield Reservoir on the South Platte River near Denver.
- 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: Howard A. Hanson Dam Target entity description: Howard A. Hanson Dam is a large flood-control and water-supply dam on Washington State’s Green River that helps protect the Seattle–Tacoma area from flooding and supports regional water needs.
-
A.
R. L. Harris Dam
R. L. Harris Dam is a hydroelectric dam in Alabama that impounds the Tallapoosa River to form Lake Wedowee and generate power.
-
B.
Jim Woodruff Dam
Jim Woodruff Dam is a hydroelectric and flood-control dam on the Apalachicola River at the Florida–Georgia border, forming Lake Seminole and helping regulate water flow in the region.
-
C.
Morris Sheppard Dam
Morris Sheppard Dam is a large hydroelectric and flood-control structure in Texas that impounds the Brazos River to form Possum Kingdom Lake.
-
D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Chatfield Dam
Chatfield Dam is a large flood-control and water-storage structure in Colorado that creates Chatfield Reservoir on the South Platte River near Denver.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
earthfill dam
ⓘ
flood control dam ⓘ water supply dam ⓘ |
| basin | Duwamish–Green River basin NERFINISHED ⓘ |
| catchmentArea | Green River watershed NERFINISHED ⓘ |
| completedIn | 1962 ⓘ |
| constructionBegan | 1959 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| damType | earth and rockfill embankment ⓘ |
| designedBy | United States Army Corps of Engineers NERFINISHED ⓘ |
| hasEmergencyRole | protects industrial and residential areas in the Green River Valley from major floods ⓘ |
| hasFunction |
reduces peak flood discharges
ⓘ
regulates Green River streamflows ⓘ supports municipal water storage ⓘ |
| hasSpillwayType | concrete spillway ⓘ |
| height |
235 feet
ⓘ
approximately 72 meters ⓘ |
| helpsControlFloodingFor | downstream communities along the Green River ⓘ |
| helpsSupplyWaterTo |
Seattle metropolitan area
NERFINISHED
ⓘ
Tacoma metropolitan area NERFINISHED ⓘ surrounding South King County communities ⓘ |
| length |
675 feet
ⓘ
approximately 206 meters ⓘ |
| locatedIn |
King County
ⓘ
surface form:
King County, Washington
|
| locatedInNationalForest | Mount Baker–Snoqualmie National Forest NERFINISHED ⓘ |
| locatedInState | Washington NERFINISHED ⓘ |
| locatedNear | Enumclaw, Washington NERFINISHED ⓘ |
| locatedOnRiver | Green River NERFINISHED ⓘ |
| managedBy | United States Army Corps of Engineers NERFINISHED ⓘ |
| namedAfter | Howard A. Hanson NERFINISHED ⓘ |
| namedForOccupation | King County Commissioner ⓘ |
| nearCity | Palmer, Washington NERFINISHED ⓘ |
| opened | 1962 ⓘ |
| operatedBy | United States Army Corps of Engineers Seattle District NERFINISHED ⓘ |
| ownedBy | United States government ⓘ |
| partOf | federal flood control system in western Washington ⓘ |
| protectsArea |
Green River Valley
NERFINISHED
ⓘ
Seattle–Tacoma metropolitan area NERFINISHED ⓘ |
| purpose |
fish habitat management
ⓘ
flood control ⓘ municipal water supply ⓘ |
| regionServed | Puget Sound region NERFINISHED ⓘ |
| reservoirCapacity | about 106,000 acre-feet ⓘ |
| reservoirName | Eagle Gorge Reservoir 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: Howard A. Hanson Dam Description of subject: Howard A. Hanson Dam is a large flood-control and water-supply dam on Washington State’s Green River that helps protect the Seattle–Tacoma area from flooding and supports regional water needs.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Green River (Washington)