O'Shaughnessy Dam

E145604
concrete arch-gravity dam 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.

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All labels observed (1)

Label Occurrences
O'Shaughnessy Dam canonical 3

Statements (49)

Predicate Object
instanceOf concrete arch-gravity dam ⓘ
dam ⓘ
architectEngineer Michael Maurice O'Shaughnessy ⓘ
associatedHydroelectricSystem Hetch Hetchy Power System ⓘ
authorizedBy Raker Act ⓘ
basinCountry United States of America ⓘ
surface form: United States
constructionStartDate 1919 ⓘ
controversy inundation of Hetch Hetchy Valley ⓘ
country United States of America ⓘ
surface form: United States
creates Hetch Hetchy Valley ⓘ
surface form: Hetch Hetchy Reservoir
crosses Tuolumne River ⓘ
elevationAtCrest about 1,158 meters above sea level ⓘ
about 3,800 feet above sea level ⓘ
height about 139 meters ⓘ
about 430 feet ⓘ
impounds Hetch Hetchy Valley ⓘ
length about 175 meters ⓘ
about 575 feet ⓘ
locatedIn California, United States ⓘ
surface form: California

Tuolumne County ⓘ
surface form: Tuolumne County, California

United States of America ⓘ
surface form: United States

Yosemite National Park ⓘ
locatedWithinProtectedArea Yosemite National Park ⓘ
material concrete ⓘ
namedAfter Michael Maurice O'Shaughnessy ⓘ
nearbyCity Groveland, California ⓘ
Manteca, California ⓘ
openingDate 1923 ⓘ
operatedBy San Francisco Public Utilities Commission ⓘ
opposedBy John Muir ⓘ
Sierra Club ⓘ
ownedBy San Francisco County ⓘ
surface form: City and County of San Francisco
partOf Hetch Hetchy Power System ⓘ
surface form: Hetch Hetchy Project

Hetch Hetchy Power System ⓘ
surface form: Hetch Hetchy Regional Water System
purpose flood control ⓘ
hydroelectric power generation ⓘ
municipal water supply ⓘ
RakerActSignedBy Woodrow Wilson ⓘ
regionServed San Francisco Bay Area ⓘ
reservoirCapacity about 360,000 acre-feet ⓘ
about 444 million cubic meters ⓘ
reservoirName Hetch Hetchy Valley ⓘ
surface form: Hetch Hetchy Reservoir
riverBasin Tuolumne River ⓘ
surface form: Tuolumne River basin
suppliesWaterTo Peninsula communities in the San Francisco Bay Area ⓘ
San Francisco ⓘ
San Francisco Bay Area ⓘ
parts of Silicon Valley ⓘ
typeOfDam arch-gravity dam ⓘ
waterSource Sierra Nevada snowmelt ⓘ

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Tuolumne River → hasDam → O'Shaughnessy Dam ⓘ
Hetch Hetchy Valley → hasLandmark → O'Shaughnessy Dam ⓘ
Hetch Hetchy Valley → impoundedBy → O'Shaughnessy Dam ⓘ