Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910: The New York Tunnel Extension of the Pennsylvania Railroad.: The East River Division. Paper No. 1152

Published in September 1910, 'Transactions of the American Society of Civil Engineers, Vol. LXVIII' by Alfred Noble details the engineering challenges and methodologies of the New York Tunnel Extension of the Pennsylvania Railroad, specifically the East River Division. The work discusses geological surveys, tunneling techniques such as the shield method, and the collaboration among engineers in overcoming issues like quicksand and gravel. This publication is notable for its in-depth analysis of early 20th-century civil engineering practices and the complexities involved in large-scale tunnel construction.