New York Approved $3.26 Billion Power Transmission Line
The 90-mile infrastructure project will increase electricity capacity between Long Island and the state's mainland.
Updated on Sept. 21, 2026 in Utilities
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The New York Public Service Commission approved the $3.26 billion Propel NY Energy transmission project on September 17, 2026. This infrastructure expansion aims to improve downstate grid reliability and facilitate power flows from planned offshore wind farms.
Why it matters
The project addresses a critical bottleneck in regional power delivery by connecting Long Island to the mainland grid through nine substations. This is essential for the state to integrate new offshore wind capacity as it works toward a zero-emission electric demand system by 2040.
The $3.26 billion project covers 90 miles of 138 kV and 345 kV underground transmission lines across five counties. The infrastructure is designed to support the state's mandate to reach 9 GW of offshore wind capacity by 2035.
The players
New York Public Service Commission
The state regulatory agency responsible for overseeing and approving utility infrastructure projects.
New York Transco
A developer and owner of electric transmission infrastructure focused on modernizing the power grid.
New York Power Authority
The nation's largest state public power organization, operating transmission assets and power plants across New York.
New York ISO
The independent operator managing the state's electricity grid and wholesale power market.
The details
Developed by New York Transco and the New York Power Authority, the project utilizes underground cabling to navigate high-density areas including Queens, the Bronx, and Westchester. By integrating nine existing or new substations, the project creates a more robust pathway for electricity to move into the downstate region. Construction will occur in limited segments and phases to manage local disruption, with comprehensive work expected by mid-2027.
Timeline
September 17, 2026: The Public Service Commission approved the transmission project.
October 1, 2026: Deadline for submitting comments on Environmental Management and Construction plans.
Mid-2027: Comprehensive construction is anticipated to begin.
2030: Target date for project completion.
Market Landscape
This project follows the competitive selection process initiated by the New York ISO in 2023 to modernize the state's aging grid. It represents a major capital deployment necessary to align existing infrastructure with the state's 2040 zero-emission electric demand system goal.
Operators in the five affected counties should monitor local construction schedules as segmented phases begin in late 2026. Businesses reliant on high-capacity power should track the project's progress to understand potential grid reliability benefits by the 2030 completion target.
The takeaway
Large-scale transmission projects are the primary enablers for integrating renewable offshore wind energy into the existing power grid. Businesses should monitor Environmental Management and Construction plan filings via the PSC portal to anticipate site-specific construction timelines.
Further reading
For broader context on energy infrastructure and power grid developments, explore Utilities.
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Do you support the development of major new utility transmission projects in your area?
