EM&CP Filing

On October 3, 2025, PSEG Long Island LLC on behalf of and as agent for the Long Island Lighting Company d/b/a LIPA, a wholly-owned subsidiary of the Long Island Power Authority , filed a proposed Environmental Management and Construction Plan (EM&CP) with the New York Public Service Commission.

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SH2DF Project Filed an Application with the NYSDPS

PSEG Long Island, on behalf of the Long Island Power Authority (LIPA), filed an Application for a Certificate of Environmental Compatibility and Public Need (CECPN) with the New York State Public Service Commission (PSC), Friday, February 16, 2024 (Case 24-T-0113).

Permitting the Southampton to Deerfield Project

See "About the Project" to learn more about the need for the Southampton to Deerfield Project, and the New York State Public Service Commission process.

Construction Process

Read about how the construction process for a new underground transmission line happens.

News & Events

  • 2025

EM&CP Filing

October 3, 2025
PSEG Long Island LLC on behalf of and as agent for the Long Island Lighting Company d/b/a LIPA, a wholly-owned subsidiary of the Long Island Power Authority, filed a proposed Environmental Management and Construction Plan ("EM&CP”) with the New York Public Service Commission. The project proposed in the EM&CP consists of the design and construction of a new, 138 kV underground transmission line of approximately 4.5 miles, to be operated initially at 69 kV, between the Southampton Substation and the Deerfield Substation, in the Village and Town of Southampton, Suffolk County. The Project is driven by a requirement to address North American Electric Reliability Corporation ("NERC”) transmission planning ("TPL”) reliability standards. The addition of a second transmission line from Southampton Substation to Deerfield Substation would reinforce LIPA’s electric transmission system on the South Fork and improve reliability of service to LIPA’s customers.   http://southampton2deerfield.com/assets/document-library/EMCPPublicNoticeFiling.pdf


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About the Project

Permitting & Consultation Process

New York State Public Service Commission Article VII and EM&CP Information

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