Hetch Hetchy Valley

E136067

geographic location glacial valley

Hetch Hetchy Valley is a glacially carved valley in Yosemite National Park, California, best known for its scenic granite cliffs and for being largely submerged by the Hetch Hetchy Reservoir that supplies water to the San Francisco Bay Area.

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All labels observed (5)

Label	Occurrences
Hetch Hetchy Reservoir	6
Hetch Hetchy Valley canonical	3
Hetch Hetchy Regional Water System	1
Hetch Hetchy Reservoir watershed	1
Hetch Hetchy area	1

Statements (48)

Predicate	Object
instanceOf	geographic location ⓘ glacial valley ⓘ
accessRestrictedBy	San Francisco Public Utilities Commission regulations ⓘ
associatedWith	John Muir ⓘ Sierra Club ⓘ
climate	Mediterranean climate ⓘ
continent	North America ⓘ
country	United States of America ⓘ surface form: United States
ecosystemType	montane forest ⓘ riparian habitat ⓘ
elevation	approximately 1,160 meters ⓘ approximately 3,800 feet ⓘ
formedBy	glacial erosion ⓘ
hasLandmark	O'Shaughnessy Dam ⓘ
hasPart	Hetch Hetchy Valley self-linksurface differs ⓘ surface form: Hetch Hetchy Reservoir
hasRecreation	backpacking ⓘ hiking ⓘ wildlife viewing ⓘ
hasTrail	Wapama Falls Trail ⓘ
hasViewpoint	O'Shaughnessy Dam overlook ⓘ
hasWaterfall	Rancheria Falls ⓘ Wapama Falls ⓘ
historicallyInhabitedBy	Miwok people ⓘ Native American tribes ⓘ
impoundedBy	O'Shaughnessy Dam ⓘ
knownFor	Hetch Hetchy Reservoir ⓘ granite cliffs ⓘ water supply for the San Francisco Bay Area ⓘ
largelySubmergedBy	Hetch Hetchy Reservoir ⓘ
locatedIn	California, United States ⓘ surface form: California Sierra Nevada ⓘ Tuolumne County ⓘ surface form: Tuolumne County, California Yosemite National Park ⓘ
locatedInProtectedArea	Yosemite National Park ⓘ
managedBy	National Park Service ⓘ
partOf	Yosemite National Park ⓘ
region	Northern California ⓘ
river	Tuolumne River ⓘ
state	California, United States ⓘ surface form: California
subjectOf	Hetch Hetchy water rights controversy ⓘ early 20th century conservation debates ⓘ
traversedBy	Tuolumne River ⓘ
usedFor	hydroelectric power generation ⓘ municipal water supply ⓘ
waterBody	Hetch Hetchy Valley self-linksurface differs ⓘ surface form: Hetch Hetchy Reservoir
waterSuppliedTo	San Francisco ⓘ San Francisco Bay Area ⓘ
within	Yosemite Wilderness ⓘ surface form: Yosemite Wilderness (partially)

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: Hetch Hetchy Valley
Description of subject: Hetch Hetchy Valley is a glacially carved valley in Yosemite National Park, California, best known for its scenic granite cliffs and for being largely submerged by the Hetch Hetchy Reservoir that supplies water to the San Francisco Bay Area.