New Haven Line Substation Replacement

This project will improve power supply capacity and resiliency of the AC traction power supply system in the New York State portion of the New Haven Line. Metro-North’s AC power substation strategy recommends a package of traction power capital improvements, to be implemented in various phases.

The New Haven Line AC traction power systems are relatively robust in New York State. However, to maintain this robust system, autotransformers must be kept in a state of good repair. Currently, Metro-North is transitioning to indoor AC autotransformer substations for increased resiliency, weather resistance, and employee safety. The existing 128 and 178 substations at Mamaroneck and Harrison are outdoor switchyards with overhead wire installed in the 1980s. This design is not considered safe, weatherproof, or aligned with today’s standards. These conditions have made it all but impossible to do a partial rebuild or component replacement of the existing infrastructure and equipment. Instead, the MTA will replace these substations with new, enclosed ones meeting current standards.

A power-up for the New Haven Line

• Two new substations
• New walk-in structures
• New insulation for structures and cables
• More reliable service for 23 million annual passengers on the New Haven Line

• Call the 24/7 project hotline at 203-702-8899.