. Pennsylvania Railroad tunnels and terminals in New York City / . JUNCTION OF SOUTH TUBES, building last rings, Nov. 14, 06; bores made by driving113-ton steel shield with 24 hydraulic rams exerting forward pressure of 6,000,000 lbs. Weightof shield and machinery, 193 tons. EMERGENCY AIR-LOCK for refuge in case of flooding. LINING AND WATERPROOFING rock section under Manhattan after DUCTS for electric power and light wires to carry the 105,000 electricalnorse-power which will be required to move the trains and light stations and tunnels. EXCAVATING under 9th Ave. L for cut t
. Pennsylvania Railroad tunnels and terminals in New York City / . JUNCTION OF SOUTH TUBES, building last rings, Nov. 14, 06; bores made by driving113-ton steel shield with 24 hydraulic rams exerting forward pressure of 6,000,000 lbs. Weightof shield and machinery, 193 tons. EMERGENCY AIR-LOCK for refuge in case of flooding. LINING AND WATERPROOFING rock section under Manhattan after DUCTS for electric power and light wires to carry the 105,000 electricalnorse-power which will be required to move the trains and light stations and tunnels. EXCAVATING under 9th Ave. L for cut through which materials trom station excava-tion are carried to scows which are towed to Greenville, N. J., to fill in great freight yard,EIGHTH AVENUE, with trolley line supported on tre«tle during work on scation
Size: 1224px × 2043px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1900, booksubjectrailroadtunnels
