Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The Cross-Town Tunnels. Paper No. 1158

"Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910" is a detailed engineering publication by James H. Brace and Francis Mason that explores the construction of the New York Tunnel Extension of the Pennsylvania Railroad. The book centers on the complex civil engineering involved in building tunnels under a bustling city, from the initial contracts to the innovative excavation methods required to navigate difficult and varied rock conditions. Readers gain insight into the challenges faced during the project, including the careful handling of spoil, the installation of crucial ventilation and power systems, and the strategies used to protect nearby structures from damage, all of which showcases the meticulous planning and precision needed to complete this expansive project efficiently.