Boulder Canyon Project (through Bechtel involvement)
E113190
The Boulder Canyon Project is the major U.S. public works initiative that led to the construction of Hoover Dam on the Colorado River, a landmark engineering feat in which Bechtel played a key contracting role.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Boulder Canyon Project (through Bechtel involvement) canonical | 1 |
| Hoover Dam project | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T963455 — 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: Boulder Canyon Project (through Bechtel involvement) Context triple: [Stephen D. Bechtel Sr., notableProject, Boulder Canyon Project (through Bechtel involvement)]
-
A.
Columbia Basin Project
The Columbia Basin Project is a large-scale irrigation and hydroelectric development in central Washington State that distributes water and power from the Grand Coulee Dam to support agriculture, industry, and communities across the region.
-
B.
State Water Project
The State Water Project is a massive California water storage and delivery system that transports water from northern sources to agricultural, urban, and industrial users across the state, including the Central Valley.
-
C.
Central Valley Project
The Central Valley Project is a large-scale federal water management system in California that stores and delivers water for agriculture, cities, and environmental uses across the Central Valley.
-
D.
Bonneville Dam
Bonneville Dam is a major hydroelectric and navigation dam on the Columbia River in the Pacific Northwest, known for power generation, fish ladders, and its role in regional river management.
-
E.
Davis Dam
Davis Dam is a concrete gravity-arch dam on the Colorado River between Nevada and Arizona that forms Lake Mohave and helps regulate water releases from Hoover Dam.
- 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: Boulder Canyon Project (through Bechtel involvement) Target entity description: The Boulder Canyon Project is the major U.S. public works initiative that led to the construction of Hoover Dam on the Colorado River, a landmark engineering feat in which Bechtel played a key contracting role.
-
A.
Columbia Basin Project
The Columbia Basin Project is a large-scale irrigation and hydroelectric development in central Washington State that distributes water and power from the Grand Coulee Dam to support agriculture, industry, and communities across the region.
-
B.
State Water Project
The State Water Project is a massive California water storage and delivery system that transports water from northern sources to agricultural, urban, and industrial users across the state, including the Central Valley.
-
C.
Central Valley Project
The Central Valley Project is a large-scale federal water management system in California that stores and delivers water for agriculture, cities, and environmental uses across the Central Valley.
-
D.
Bonneville Dam
Bonneville Dam is a major hydroelectric and navigation dam on the Columbia River in the Pacific Northwest, known for power generation, fish ladders, and its role in regional river management.
-
E.
Davis Dam
Davis Dam is a concrete gravity-arch dam on the Colorado River between Nevada and Arizona that forms Lake Mohave and helps regulate water releases from Hoover Dam.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
United States federal public works project
ⓘ
dam construction project ⓘ |
| alsoKnownAs |
Boulder Canyon Project (through Bechtel involvement)
ⓘ
surface form:
Hoover Dam project
|
| associatedCompany | Bechtel Corporation ⓘ |
| associatedIndustry |
civil engineering
ⓘ
construction ⓘ |
| authorizedBy |
Boulder Canyon Project Act
ⓘ
United States Congress ⓘ |
| benefits |
Arizona
ⓘ
California, United States ⓘ
surface form:
California
Nevada ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| developerRole | Bechtel served as a key contracting partner ⓘ |
| endYear | 1936 ⓘ |
| engineeringFeats |
large-scale diversion of the Colorado River
ⓘ
mass concrete placement for Hoover Dam ⓘ |
| fundingSource |
United States government
ⓘ
surface form:
United States federal government
|
| hasContractor |
Bechtel Corporation
ⓘ
Six Companies, Inc. ⓘ |
| hasPart |
Boulder Canyon Project Act
ⓘ
Hoover Dam ⓘ |
| impact | expanded Bechtel’s reputation in heavy civil engineering ⓘ |
| includes |
construction of Hoover Dam
ⓘ
construction of diversion tunnels for Colorado River ⓘ construction of power plant at Hoover Dam ⓘ construction of spillways at Hoover Dam ⓘ |
| legislativeActYear | 1928 ⓘ |
| locatedIn |
Black Canyon
ⓘ
Colorado River ⓘ border of Nevada and Arizona ⓘ |
| locationCountry |
United States of America
ⓘ
surface form:
United States
|
| mainStructure | Hoover Dam ⓘ |
| managedBy |
Bureau of Reclamation
ⓘ
surface form:
U.S. Bureau of Reclamation
|
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation water storage ⓘ municipal water supply ⓘ |
| regulates | water supply for Lower Colorado River Basin ⓘ |
| resultedIn | creation of Lake Mead ⓘ |
| riverControlled | Colorado River ⓘ |
| significance |
enabled large-scale development in the American Southwest
ⓘ
landmark in large-scale concrete dam construction ⓘ major U.S. New Deal–era public works project ⓘ |
| startYear | 1931 ⓘ |
| timePeriod | 1930s ⓘ |
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: Boulder Canyon Project (through Bechtel involvement) Description of subject: The Boulder Canyon Project is the major U.S. public works initiative that led to the construction of Hoover Dam on the Colorado River, a landmark engineering feat in which Bechtel played a key contracting role.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
Boulder Canyon Project (through Bechtel involvement)
→
alsoKnownAs
→
Boulder Canyon Project (through Bechtel involvement)
ⓘ
subject surface form:
Boulder Canyon Project
this entity surface form:
Hoover Dam project