Show building immense submarine tunnel for oakland IN ax N V k V if N 44 N A N V i t jr li twelve steel and concrete tubes lubes each longer than a city bock block chich have a 32 foot bore and weigh 4 buu tons ions are being behig built at if hunters point calif for the vehicular tube which will connect oakland with alameda under the Ala alvineda ineda estuary each tube must mii st be moved about nine miles across the bay before it car cap be put in ia place the ilia photograph chos a half section of one of the tubes in process of construction |