When completed in 1904, the East Boston Streetcar Tunnel from State Street, Boston, to Maverick Square provided the first nonferry connection between East Boston and the central city. An engineering marvel, it was the largest diameter and longest submarine railroad tunnel in the world, eclipsing its models in London and New York. Boston Transit Commission engineer Howard Carter used fresh concrete here for the first time in
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East Boston Streetcar Tunnel
1900–1904, Howard A. Carson; 1916, 1924 third rail subway service; 1952 extension to Wonderland. Maverick Sq.
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