g a much larger miles from the point of excavation, is in itself a task number of regular daily passenger trains to be run through the tunnel in the twenty-four hours. Further- cf huge proportions. The vast amount of excavation that is being done at more, the installation of electric traction will… … . Avenue Tunnel, During Excavation. station itself, will be carried on two levels, one above The new station yards will commence at Fifty-sev- The tracks of the main or upper yard begin to drop at Fifty-seventh Street, until they reach a level 15 the other, and to the further fact that the whole of…
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