Welcome Muni’s thrill-ridden boring machines: Big Alma and Mom Chung
Mom Chung, one of the Central Subway’s two tunnel boring machines. Photo courtesy The Robbins Company
We’re not quite sure why these earth-moving beasts deserve names, either. But we like the fun.
From SFMTA’s press release:
The first of the machines, Mom Chung, is expected to arrive in San Francisco in April. The 300-foot-long machine will be assembled within an excavation on 4th Street between Harrison and Bryant streets and will start building the tunnel for southbound trains about two months later. Big Alma will arrive soon after Mom Chung to construct the northbound tunnel.
Perhaps most importantly, follow the tunnel-boring machines on Twitter at @BigAlmatheTBM and @MomChungtheTBM (curiously, Mom Chung has more followers as of this writing).