Illustrated description of the reconstruction of the sewer system in the portion of the city necessitated by the change of grade. New sewers were required in the heart of the city, almost entirely built up, and it was decided wherever practicable to build them in the tunnel. 63 1/2 per cent, of the whole work was carried on in tunnel. (1400 w.)
The Philadelphia and Reading railroad subway and tunnel in Philadelphia
R R Gaz
1896
Aufsatz (Zeitschrift)
Englisch
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The Philadelphia and Reading railroad subway and tunnel in Philadelphia
Engineering Index Backfile | 1896
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Engineering Index Backfile | 1896
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