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Twin Peaks Tunnel

Twin Peaks Tunnel
Twin Peaks Tunnel at Forest Hill station
Overview
LocationSan Francisco, California
CoordinatesEast portal:
37°45′43″N 122°26′13″W / 37.76194°N 122.43694°W / 37.76194; -122.43694
West portal:
37°44′29″N 122°27′56″W / 37.74139°N 122.46556°W / 37.74139; -122.46556
SystemMuni Metro
CrossesTwin Peaks and surrounding neighborhoods
StartMarket Street subway
EndWest Portal Station
No. of stations3 (2 open, 1 closed)
Operation
OpenedFebruary 3, 1918 (1918-02-03)
RebuiltJune 25 – August 24, 2018
OwnerSan Francisco Municipal Transportation Agency
OperatorSan Francisco Municipal Railway
CharacterUnderground subway tunnel for light rail/streetcar system
Technical
Length11,675 ft (3,559 m)[1]: 5 
Line length2.27 mi (3.65 km)
No. of tracks2
Track gauge4 ft 8+12 in (1,435 mm) standard gauge
ElectrifiedOverhead line600 V DC
Tunnel clearance25 ft (7.6 m)[2]
Route map
Map Twin Peaks Tunnel highlighted in red
Surface tracks on Market Street
original portal
(1918–1972)
temporary portals
(1972–1982)
Eureka Valley
closed
1972
Forest Hill
West Portal S Shuttle
K Ingleside L Taraval M Ocean View

The Twin Peaks Tunnel is a 2.27-mile-long (3.65 km)[2] light rail/streetcar tunnel in San Francisco, California. The tunnel runs under Twin Peaks and is used by the K Ingleside, L Taraval, M Ocean View and S Shuttle lines of the Muni Metro system.

The eastern entrance to the tunnel is located at the west end of the Market Street subway near the intersection of Market and Castro Streets in the Castro neighborhood, and the western entrance is located at West Portal Avenue and Ulloa Street in the West Portal neighborhood, named for the tunnel. There are three stations along the tunnel, West Portal at the western entrance, Forest Hill near the middle, and the now disused Eureka Valley near the eastern end.

  1. ^ Cite error: The named reference BEN-1916 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference sfgenealogy was invoked but never defined (see the help page).

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