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About: Hetch Hetchy Railroad     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.org associated with source document(s)

Type: Thingcompanyschema:Organizationdul:Agentdul:SocialPersonagentwikidata:Q24229398OrganizationBusiness enterprisepublic transit systemgeo:SpatialThingyago:Artifact100021939yago:Barrier102796623yago:Object100002684yago:Obstruction103839993yago:PhysicalEntity100001930yago:Railing104047401yago:YagoGeoEntityyago:YagoPermanentlyLocatedEntityorganisationyago:Structure104341686yago:Whole100003553 New Facet based on Instances of this Class

The Hetch Hetchy Railroad (HHRR) was a 68-mile (109 km) standard gauge Class III railroad constructed by the City of San Francisco to support the construction and expansion of the O'Shaughnessy Dam across Hetch Hetchy Valley. The mountainous terrain resulted in steep grades (over 4%) and extremely sharp curves (30 degrees, a 190-foot (58 m) radius), requiring trains to move slowly, at speeds of less than 8 miles per hour (13 km/h).