Weekend Work March 15 - 18, 2013
To give subway maintenance workers and a contractor an opportunity to work on important construction projects, during the weekend of March 15-18, service on the line was suspended between Queensboro Plaza and Times Sq-42 St. When these projects are completed, the benefits for Flushing Line customers will be improved service reliability, greater customer comfort and improved customer communications. The 9.4-mile long line has 21 stations and connects Downtown Flushing, Queens and Midtown Manhattan.
This weekend’s work included the ongoing installation of a modern signal system, infrastructure and electrical improvement work in the under river tunnel, and replacing track on the elevated structure in Long Island City.
Signal System Modernization CBTC, Flushing LineThe contractor continued work associated with the installation of a modern signal system, known as Communications Based Train Control (CBTC), on the nearly-century old Flushing Line; the project is scheduled for completion in late 2016. Key accomplishments this weekend include the continued patching of concrete and sealing of water leaks between Grand Central-42 St and First Av. At the 5 Av station, the contractor installed 72 strapping cables and 25 serves on the cables. A “serve” is a nylon rope that goes around four to five smaller cables to secure the bundle to a larger messenger cable. Between 5 Av and First Av, two signals and two signal cases were set into place. The contractor also installed 340 linear feet of signal cable, eight holding lights, 20 third rail boots, ten sections of third rail protection board and ten “no clearance” signs.
Additional WorkThis work includes demolishing ducts on both outer walls of the Steinway Tunnel and constructing a new duct bank that will house cables that supply power to the third rail. During the weekend, on the Manhattan-bound track, the contractor poured concrete for 700 feet of duct bank, installed 870 linear feet of fiberglass reinforced epoxy duct and rebar, and pulled 1,500 feet of negative feeder cable. The contractor also installed 1,570 feet of steel concrete forms and 1,300 feet of vertical rebar on the Manhattan-bound track. On the Queens-bound track, the contractor demolished the final 175 feet of old duct bank.
Capital Track ProgramOn the Manhattan-bound track, track maintenance forces continued replacing track panels outside of the Queensboro Plaza station in the direction of Court Sq station.
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