Muni is exploring new options for retrieving tunneling equipment in or near North Beach, including one that could save the agency $23 million while keeping the machinery underground indefinitely. As part of its $1.6 billion Central Subway project, which will extend underground Metro service from South of Market to Chinatown, Muni wants to extract a tunnel-boring machine through Columbus Avenue. Preparation for that process began this year and will be finished by Thanksgiving 2013. Read More