South Oswego-Tar Hill

Central New York

National Grid’s South Oswego-Tar Hill project includes rebuilding approximately 28.6 miles of 115kV electric transmission lines in Oswego County, the construction of three new substations, and upgrading one additional substation.

South Oswego-Tar Hill

Project Quick Facts

Project Details

South Oswego-Tar Hill serves Oswego County and travels through the City of Oswego, and the towns of Albion, Mexico, New Haven, Orwell, Richland, and Scriba.
The project will replace existing 115kV wire and structures in the right-of-way. Additional easements may be needed for the construction and operation of the line.
National Grid will also build three new substations -- Duer Street in Oswego, Maiden Lane in Scriba and Tar Hill in Albion -- to support this project. The South Oswego substation
Also included are access roads upgrades, and technologies to improve response time and decrease maintenance costs.

Questions or Feedback

If you have a question or complaint, you can contact the project team at 844-473-6864, email us at [email protected], or complete this form. Note, if you are trying to contact us because of an emergency, please call 911.

Construction and Permitting Updates

Weekly Construction Updates

NYS Department of Public Service Case Files

Permitting: The New York State Public Service Commission awarded an Article VII permits for this project on Feb. 12, 2026. National Grid is in the process of filing Environmental Management and Construction Plans with the PSC.

Article VII and EM&CP applications may be viewed as part of case 25-T-0049.

Document Library

Permitting and Participation

This project required Article VII permitting. The New York State Public Service Commission awarded Article VII permits for the transmission lines and substations for this project on February 12, 2026 as part of case no. 25-T-0049.

National Grid will require a Certificate of Environmental Compatibility and Public Need to begin construction. Our Environmental Management and Construction Plan applications are in the process of being filed with the PSC and may be viewed at the above link. For more information about permitting, please see our Project FAQ page.

To contact National Grid with a question or comment, you may reach us by phone at 844-473-6864 or [email protected].

Schedule

Design & Permitting: Through Spring 2027
Construction Started: March 2026 (Maiden Lane substation); other work begins as early as fall 2026.
Anticipated Construction End: 2028