By Sasha Lekach, Bay City News :sfappeal – excerpt
San Francisco Mayor Ed Lee and other city officials marked a milestone in the Central Subway project this morning with the completion of tunnel boring from downtown San Francisco to North Beach.
Two boring machines, affectionately named Mom Chung and Big Alma after historical San Francisco women, made it 8,500 feet to the former site of the Pagoda Palace Theater earlier this month after about a year of digging two underground tunnels.
The tunnels will connect the San Francisco Municipal Railway T-Third line from the South of Market area through Union Square and into Chinatown.
The $233 million tunnel, which started in 2012, is part of the $1.6 billion Central Subway project expected to be completed in 2019…
Chiu said he “had a vision” of the tunnel connecting the subway to North Beach and Fisherman’s Wharf as well.
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