As a subconsultant, SI Engineering, P.C. (SIE) provided consultant construction management services for this design-build project. The project involved coordination of interdisciplinary work, including electrical, architectural, civil, structural, mechanical, communications, instrumentation and control, signals, track, traction power, and environmental disciplines.
Major components of the project included replacing the track and track appurtenances on the Jamaica Line and 63rd Street Line; replacement of existing contact rail with new 84C composite contact rail and all appurtenances and cable connections; injection of chemical grouting and NOH2O injection at locations throughout the project to address leaks in the subway structure prior to the installation of new track, signal, and traction power elements; signal component replacement including stop machines, signal heads, riser boxes, and various component cabling; and replacement or maintenance of existing equipment, including cables, trays, conduits, discharge lines, and drainpipes as required.
Common tasks to all components of the project included coordinating access and work with private properties in the area; dust and noise control and protection for construction and demolition; and site preparation at work areas, including construction staging and contractor laydown areas. SIE also provided construction support services. Additional work on this project included temporary construction of utilities and services as required; relocation, support, and / or maintenance of existing utilities; maintenance and protection of traffic (MPT); protection of existing facilities, structures, utilities, and appurtenances from construction influence; and temporary mechanical and electrical services as required for construction support. This project also required coordination with and protection of existing operating NYCT subway and stations, as well as coordination with other ongoing contracts on the Jamaica Line and 63rd Street Line.
