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New York state officials approve USD28 million for 345 kV project [free access]

May 21, 2019

The New York state officials have approved USD28 million funding for the first phase of the Edic/Marcy–New Scotland and Princetown–Rotterdam project being proposed by LS Power Grid New York, LLC (formerly known as North America Transmission, LLC), and New York Power Authority (NYPA).


The project forms Segment A of the AC Public Policy Transmission Project, which has recently been approved by the Board of Directors of New York Independent System Operator (NYISO). The Project T027 (Edic/Marcy–New Scotland and Princetown–Rotterdam project), involves the construction of an approximately 86-mile-long (138.5 km), 345 kV double-circuit line from Edic or Marcy to New Scotland and approximately five miles (8 km) of two 345 kV or 230 kV single-circuit lines from Princetown to Rotterdam on the existing Edic to Rotterdam right-of-way (RoW). It also includes the installation of two new 345/115 kV lower impedance transformers connecting the existing 115 kV Rotterdam switchyard to the new 345 kV switchyard, and a new 345/230 kV transformer connecting the existing 230 kV Rotterdam to Eastover Road line (Line #38) to the new 345 kV Rotterdam switchyard. In addition, this segment entails decommissioning of two 230 kV lines from Porter to Rotterdam, and one 115 kV line from Rotterdam to New Scotland; rebuilding of approximately six miles (9.7 km) of a 345 kV line from Rotterdam to New Scotland; and undertaking related switching or substation works at the Edic or Marcy, Princetown, Rotterdam and New Scotland substations. The total cost for this project is estimated to range from USD577 million to USD750 million.


The AC Public Policy Transmission Project also has Segment B, which is being developed by Niagara Mohawk Power Corporation and New York Transco, and involves transmission network expansion at 345/115 kV.


LS Power is planning to submit an application to construct the project, to the New York Public Service Commission (PSC) in the second half of 2019. Following a full review and authorisation by the PSC, including numerous opportunities for additional public participation, the rebuilt transmission lines are expected to be in service by the end of 2023.