Nineteenth Annual Report of the Boston Transit Commission, for the Year Ending June 30, 1913 (Classic Reprint)

Nineteenth Annual Report of the Boston Transit Commission, for the Year Ending June 30, 1913 (Classic Reprint)

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Excerpt from Nineteenth Annual Report of the Boston Transit Commission, for the Year Ending June 30, 1913 The record of detailed progress on the Boylston street subway will be found in the report of the Chief Engineer. The work has steadily progressed, and of the portion between the western entrance and Arlington street 75 per cent. Is now completed. The principal engineering problem in connection with this subway was the construction opposite the tower of the Old South Church at Boylston and Dartmouth streets. It is a well-known fact that this tower is not vertical, as it should be, but has leaned from the perpendicular towards the west and southwest ever since its completion. Its deflection at the top is about two feet ten inches from the perpendicular. In order to construct the subway in front of the church, a line of steel sheet piling was driven on each side of the subway in the street, pipes were driven behind this sheeting on both sides, to a depth below the bottom of the subway, and neat cement grout was pumped into the ground under pressure. The subway will be constructed in narrow slices extending clear across between the lines of sheet piling, each slice being com pleted before the adjoining one is begun. This will diminish as much as possible the amount of trench open in the 'street at any one time. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.show more

Product details

  • Paperback | 136 pages
  • 152 x 229 x 7mm | 191g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243208065
  • 9780243208067