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Chambers Street Signal Modernization

L.K. Comstock modernized the signal system for the Chambers Street interlocking in New York's Financial District.
Project Highlights 
  • Rehabilitated two existing complexes and constructed the new complex
  • Installed AC, HVAC, duct work, fans, dampers and associated controls
  • Installed new ties, rail, insulated joints and associated negative work
  • Installed new fiber optic, communications, CCTV, intrusion/security and fire suppression systems
  • Installed new electrical systems
  • Installed and wired new signal control equipment
Transit & Systems
New York, New York
Customer 
New York City Transit Authority, part of the Metropolitan Transit Authority
Business Unit 
L.K. Comstock & Company
Project Description 

L.K. Comstock served as the prime contractor for the $88-million project to restore full functionality to the Chambers Street interlocking and rehabilitate the connecting World Trade and Canal Street interlockings and associated control tower.

Project Scope 

The Chambers Street project became an urgent priority following a fire in 2005 that swept through the interlocking relay room. As the prime contractor, L.K. Comstock coordinated and completed various types of civil, systems, electrical, communications, track and signals work:

  • Civil – Rehabilitated two existing complexes and constructed the new complex to house the new signal equipment.
  • Mechanical – Installed AC, HVAC, duct work, fans, dampers and associated controls for each complex.
  • Track – First tier subcontractor RailWorks Transit installed new ties, rail, insulated joints and associated negative work.
  • Communications – Installed new fiber optic and communications systems between locations, CCTV systems, intrusion/security and fire suppression systems.
  • Electrical – Installed new electrical systems and wiring within each complex.
  • Signal – Installed and wired new signal control equipment in three relay rooms and the master control tower as well as new wayside signal equipment.

L.K. Comstock monitored the signal design, schedule and delivery of signal equipment from subcontractor Ansaldo STS. In addition to removing all existing relay room and wayside control equipment, L.K. Comstock also performed the signal design check and placed each interlocking in service.

Unique Features 

The interlocking is located in Manhattan's Financial District, close to where 15 million passengers travel each year through the Chambers Street-World Trade Center station. It controls the signal system for the downtown portion of three primary subway lines – A, C and E – a main transportation route from Queens, Brooklyn and Upper Manhattan into the heart of Manhattan. Due to the fire, the disabled interlocking limited subway service and routing options for five years. But by the end of May 2010, with all phases of the project completed, NYCT resumed operation of the fully restored and modernized interlocking.