The New York State Public Utilities Commission on Oct. 16 approved a joint proposal to build a two-mile, 345-kV underground transmission line connecting National Grid’s Clay substation to Micron Technology’s planned semiconductor manufacturing campus in the state’s Onondaga County.
The decision also authorizes the company’s construction and environmental management plan for the first phase of substation expansion and site connection work needed to power the estimated $100 billion complex. State officials have called the project the largest private investment in New York history.
The action also marks the first statewide infrastructure approval directly tied to Micron’s eligibility for federal CHIPS and Science Act incentives, linking New York’s regulatory process to the national semiconductor manufacturing initiative.
Gov. Kathy Hochul called the decision a “major milestone” in the development of the Micron project. “This project is destined to transform downtown New York, and we are moving quickly with full speed and due deliberation,” he said.
Hochul reaffirmed projections of approximately 9,000 direct jobs at the facility and more than 50,000 statewide over the next two decades.
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what lies ahead
State documents reviewed by ENR describe the transmission route as essential “enabling infrastructure” for the Clay campus, designed to deliver high-capacity power while minimizing surface disruptions.
The commission order covers eight underground laterals, each between 0.9 and 2 miles long, and a substation expansion to the east to accommodate the megafab’s projected electrical load.
An aerial view of the 1,400-acre site in Clay, New York, where Micron Technology plans to build its $100 billion semiconductor manufacturing complex. The New York Public Service Commission recently approved a 345 kV underground transmission line connecting the property to National Grid’s nearby Clay substation.
Image courtesy of the Onondaga County Office of Economic Development
The installation will consist of the construction of duct banks, precision trenches and thermal filling typical of underground high-voltage works, with environmental safeguards for soil manipulation and the protection of bodies of water coordinated with the Department of Environmental Conservation.
Commission Chairman Rory M. Christian said the agency found that “no party objected to the transfer request or the terms of the joint proposal” and that the terms of the certificate “are adequate to protect the public interest and ensure that potential negative impacts are avoided or minimized.”
With approval secured, National Grid can move forward with mobilization for substation expansion and right-of-way preparation. While no firm start date has been announced, the Environmental Construction and Management Plan outlines pre-construction surveys and material deliveries starting in late 2025, followed by trenching, conduit installation and system energization through 2026.
When completed, the upgraded Clay Substation will provide redundant high-voltage feeds to Micron’s campus and strengthen the grid’s capacity to support future industrial growth in Central New York.
The transmission line project is the first major construction component of Micron’s multi-decade construction in the Syracuse region. The company has said that construction of the first manufacturing plant will follow the preparation of utilities, and production will increase later in the decade.
Total cleanroom area could exceed 2.4 million square feet across four factories, according to company planning documents.
State officials continue to align the project with Green CHIPS goals that link incentives to environmental compliance, workforce development and community investment. Empire State Development, which negotiated the state incentive package, predicts the Micron program will generate about $9.5 billion annually in regional production by 2027 and more than $16 billion by 2041.
The agency also cited a $500 million community investment fund and new training partnerships with the Syracuse City School District and Onondaga Community College aimed at building a long-term skilled labor pipeline.
The commission’s decision signals the start of tangible field activity with initial work focused on high voltage civil construction, underground services and substation expansion. Additional bids for roads, water and sewer service, and rail access are expected as development of the site progresses.
Micron’s executive vice president of global operations, Manish Bhatia, called the decision “another step in our journey to bring Micron’s investments to downtown New York” and said it will “help us build cutting-edge, high-volume memory manufacturing here.”
