San Francisco Twin-Peaks Tunnel Rehabilitatin

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San Francisco Twin-Peaks Tunnel Rehabilitatin
Posted by daveklepper on Wednesday, May 30, 2018 3:54 AM
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http://sanfrancisco.cbslocal.com/2018/05/28/san-francisco-muni-gives-the-twin-peaks-tunnel-a-makeover/
 

San Francisco Muni Gives The Twin Peaks Tunnel A Makeover

 
 
May 28, 2018 at 3:38 pm

SAN FRANCISCO (CBS SF) — After 100 years of helping to transport commuters daily from San Francisco’s West Portal neighborhood to downtown, the Twin Peaks Tunnel is getting a much-needed makeover.

And it’s much more than just slapping on a little new paint and replacing a few old light fixtures. The San Francisco Municipal Transportation Agency is replacing everything inside the tunnel — tracks, drainage system, the covering on the walls and giving it a seismic retrofit.

SFMTA Director of Transit John Haley calls the 2-mile-long tunnel “the heart of the (Muni Metro) system.” Over 80,000 commuters travel through the tunnel each days as they travel from San Francisco’s western neighborhood to downtown.

The transit agency took advantage of a Memorial Day weekend shut down of the tunnel to give the media a look inside on Monday.

“You heard a lot of grinding and that’s to take down some old concrete that’ll be ready to reinforce with a new concrete again for the next hundred years,  for making sure that the structure is safe for the next” Haley said.

Transit officials are shutting down the tunnel for 60 days from June 25 to August 24 to work on it.

For the L-Taraval and the M-Ocean View line, buses will replace regular Muni metro service.  The K-Ingleside line will operate along a modified route for the 60 day shutdown, probably bypassing the tunnel as an extension of the J (DLK comment)  Also, the N, Judah, is unaffected, using the Sunset Tunnel, which is newer..

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