ZeroC / Petawatt Holdings Data Center Site (417 County Route 42)

Facility record

Lifecycle

ProposedSource-reported lifecycle

Location precision

approximate

Address as listed

417 County Route 42

Coordinates

44.953, -74.86

Serving utility, source-reported

Massena Electric Department (MED)

Operational capacity, source-reported

Not published

Planned capacity, source-reported

200 MW

Source record updated

2026-09-21

Source-reported capacity; not metered consumption. Review underlying documents and notes. Planned capacity may include future phases and is not added to operational capacity here. The source may use facility, grid-feed or IT capacity definitions; consult the linked documents.

Coordinate precision is a source label, not an independent parcel survey. A marker does not confirm utility territory or establish an effect on residential bills.

Reported lifecycle history

1. 2025-02-20Proposed

   Massena Town Planning Board approved (4-0) the site plan for a ~$30M substation at 417 County Route 42 intended to serve a future data center; applicant said the site is 'currently a 200 Megawatt site' and would start construction within 60 days of approval

   Underlying source

Source notes

Site preparation (brush clearing) and a ~$30M substation were approved in Feb 2025 to hold a NYISO queue position; the deed is in ZeroC Data Centers' name with Petawatt as majority shareholder. Applicant estimated a ~900,000 sq ft building and an employment ratio of 40–60 people per 100 MW, and offered to guarantee no cryptocurrency mining. Two containers of crypto mining were on the parcel at the time. NYISO queue shows a 200 MW request (#1213, 2021) and a later 300 MW request (#1731, March 2025) at the Dennison 115 kV substation. As of September 2026, no building application had been found. Coordinates are a road-level geocode of County Route 42 near Dennison Road, not a confirmed parcel point.

Applicant told the planning board the substation would sit in MED service territory, interconnecting via the Dennison 115 kV substation (NYISO queue #1213/#1731).

Sources and provenance

• Massena Town Planning Board minutes, 2025-02-20 — Site Plan Review #2: ZeroC Data Centers LLC & Petawatt Holdings, Inc., 417 County Route 42 (Tax Map 10.001-1-7.21) · source retrieved 2026-09-21
• Land clearing underway for new Massena data center substation (Petawatt Holdings, County Route 42, 14-acre parcel) · source retrieved 2026-09-21
• St. Lawrence County planning board makes recommendations for future data centers in Massena (references Petawatt Holdings substation site plan) · source retrieved 2026-09-21
• St. Lawrence County Planning — LGC 2025 Planning & Zoning presentation: NYISO interconnection queue excerpt (Petawatt Holdings 'St Lawrence Data and Agricultural Center' 200 MW, queue #1213; ZeroC Data Centers 'New York State Artificial Intelligence Data Center' 300 MW, queue #1731; both POI Dennison 115 kV) · source retrieved 2026-09-21
• Petawatt Massena Data Center — planned, 14 acres · source retrieved 2026-09-21

Power Wars capture: 2026-11-02. Compute Atlas, CC BY 4.0. Entries are not independently verified by Power Wars unless stated.