This is a source-attributed discovery row. It can help you find a place and its citations; it is not a DataCenterData finding that the facility is distinct or currently operating.
Reported geography
Source-reported location for ZeroC / Petawatt Holdings Data Center Site (417 County Route 42).
Approximate source coordinates; this is not a parcel claim. Nearby source points are combined into one accessible target that opens this exact map scope. View these exact rows on the interactive map →
Source row snapshot
- Operator as published
- ZeroC Data Centers LLC (majority-owned by Petawatt Holdings, Inc.)
- Address and locality
- 417 County Route 42 · Massena · St. Lawrence County · New York · 13662
- Official metro area
- Outside an official metropolitan boundary
- Source-reported status
- proposed
- Provider facility type
- data center
- Reported capacity
- Planned: 200 MW (source-reported; boundary not independently verified; MW measure not stated by provider)
- Source freshness
- 21 September 2026
- Location precision
- approximate
- Compute Atlas confidence label
- reported (provider's classification; not a DataCenterData check)
- Stable directory ID
dcd-dir-001636
Reported details
Source-reported by Compute Atlas; not independently verified by DataCenterData. Provider wording is kept; long provider notes are shortened and marked …; unknown is not zero; none of these values is totaled, ranked or compared.
- Electric utility
- Massena Electric Department (MED)
- Land area
- 14 acres (source-reported; parcel boundary not established)
- Announced
- January 2025
Provider notes
Energy. Applicant told the planning board the substation would sit in MED service territory, interconnecting via the Dennison 115 kV substation (NYISO queue #1213/#1731).
What the source record says
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. No building application found this session. Coordinates are a road-level geocode of County Route 42 near Dennison Road, not a confirmed parcel point.
Any MW value is reproduced as source-reported context. Its measurement boundary is not established consistently enough for comparison. Unknown is not zero.
Status history supplied by the source
- 2025-02-20 · source-reported proposed
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
Sources and attribution
- 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) · Town of Massena
- Land clearing underway for new Massena data center substation (Petawatt Holdings, County Route 42, 14-acre parcel) · Watertown Daily Times / NNY360 via Yahoo News
- St. Lawrence County planning board makes recommendations for future data centers in Massena (references Petawatt Holdings substation site plan) · NNY360
- 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) · St. Lawrence County Planning Office
- Petawatt Massena Data Center — planned, 14 acres · Cleanview
Adapted from Compute Atlas by Edward Kubiak, edition 1.34.1+reviewed-2610e0556b3d, under CC BY 4.0. Upstream ID petawatt-zeroc-massena-ny. Filtered to data-center records in the 50 U.S. states; selected fields normalized for search and display; DataCenterData directory IDs added. Some locations in this layer are reported by the provider as derived from OpenStreetMap (© OpenStreetMap contributors, ODbL, https://www.openstreetmap.org/copyright) and Epoch AI (CC BY 4.0).
Compute Atlas 1.34.1 with retained prior rows and publication holds. This is a DataCenterData composite, not an unmodified publisher edition. This row uses the captured source from 1.34.1, source as of 2026-10-14T20:40:52.293Z.
That does not mean the row is wrong, and it does not mean no reviewed record exists for the same place. A link is added only when an identifier or source establishes the match.
Recorded information
What this page records, grouped by topic, with the source's units and qualifications. Company-reported values stay labelled as company-reported. Related listings are shown separately.
Licensed directory listing dcd-dir-001636
Licensed directory row.
Provider notes and the source narrative are printed on this page and are not repeated here.
Identity and relationships
- Provider facility type: data center
Provider facility type.
Location and precision
- 417 County Route 42, Massena, NY 13662 · St. Lawrence (Approximate location)
Roles
- Operator: ZeroC Data Centers LLC (majority-owned by Petawatt Holdings, Inc.)
Operator label as published by the provider; no parent company is inferred.
Lifecycle
- Source-stated status: source-reported proposed
Provider status label; not a DataCenterData finding that the facility is operating.
- Announced: January 2025
Provider-reported announcement date.
- Status history: 2025-02-20 · source-reported proposed
Status history supplied by the source.
Area, acreage and buildings
- Land area: 14 acres (source-reported; parcel boundary not established)
Power capacity
- Reported capacity: Planned: 200 MW (source-reported; boundary not independently verified; MW measure not stated by provider)
Reproduced as the page prints it; not ranked or totaled; unknown is not zero.
- Electric utility: Massena Electric Department (MED)
Utility as named by the provider.
Sources, dates, limitations and corrections
- Provider update date: 2026-09-21
Provider update date is not a DataCenterData verification date.
Not yet recorded here: Cooling, water, PUE and WUE · Connectivity · Services · Certifications and design ratings · Rack density · Availability · Specification links and contact · Permits, incentives, jobs and proceedings.
Licensed values: adapted from Compute Atlas by Edward Kubiak under CC BY 4.0. Source-reported and not independently verified.
Update this profile with a public source. The request includes topics needing more information; this does not mean the facility lacks them. Corrections and additions are reviewed before publication.