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 Arsenal Data Site (Arconic Massena Operations).
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
- Arconic Corporation (Apollo-owned)
- Address and locality
- 45 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
- Not established; source review excludes the published figure
- Source freshness
- 9 October 2026
- Location precision
- approximate
- Compute Atlas confidence label
- rumored (provider's classification; not a DataCenterData check)
- Stable directory ID
dcd-dir-001599
Row says 933 MW derives from an unfetched rate-limited report; verified queue entries are alternative 250/500/1,000 MW requests. The upstream row remains attributed below, but this value is not repeated as site capacity.
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
- New York Power Authority (NYPA) / National Grid
Provider notes
Energy. NYISO queue lists NYPA as interconnecting utility and National Grid as affected transmission owner, POI Denniston Substation.
What the source record says
Lead only: known from three NYISO large-load queue positions filed by Arconic Corporation in March 2025 (250/500/1,000 MW alternatives — not summed here), all at the Denniston/Dennison substation. No site plan, permit application or public announcement was found this session; a local report that Arconic wants to use excess plant space for a ~933 MW data center could not be fetched (nny360 rate-limited). Apollo Global Management owns both Arconic and Stream Data Centers. Coordinates are the OSM landuse centroid for Arconic Massena Operations, not a data-center parcel.
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
- 2025-03-07 · source-reported proposed
Arconic Corporation filed three NYISO large-load interconnection requests (#1728 'Arsenal Data Site 250', #1729 'Arsenal Data Site 500', #1730 'Arsenal Data Site 1000'; 250/500/1,000 MW), POI Denniston Substation (NYPA), proposed in-service 03-2027
Sources and attribution
- St. Lawrence County Planning — LGC 2025 Planning & Zoning presentation: NYISO queue excerpt listing Arconic Corporation 'Arsenal Data Site 250/500/1000' (queue #1728–1730, IR 3/7/2025) · St. Lawrence County Planning Office
- Data Centers in New York — 'Arsenal Data Site', Arconic Corporation, St. Lawrence, 933 MW planned · Cleanview
- EPA RCRA profile — ARCONIC MASSENA OPERATIONS, 45 County Route 42, Massena NY 13662 (~2,700 acres) · US EPA
- NYISO Interconnection Queue, Load Projects: #1728/#1729/#1730 'Arsenal Data Site 250/500/1000', Arconic Corporation, peak MW 233 / 233 / 467 (DAT-AI), status 5 · New York Independent System Operator
Adapted from Compute Atlas by Edward Kubiak, edition 1.34.1+reviewed-2610e0556b3d, under CC BY 4.0. Upstream ID arconic-arsenal-data-site-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-001599
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
- 45 County Route 42, Massena, NY 13662 · St. Lawrence (Approximate location)
Roles
- Operator: Arconic Corporation (Apollo-owned)
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.
- Status history: 2025-03-07 · source-reported proposed
Status history supplied by the source.
Power capacity
- Reported capacity: Not established; source review excludes the published figure
Reproduced as the page prints it; not ranked or totaled; unknown is not zero.
- Electric utility: New York Power Authority (NYPA) / National Grid
Utility as named by the provider.
Sources, dates, limitations and corrections
- Provider update date: 2026-10-09
Provider update date is not a DataCenterData verification date.
Not yet recorded here: Area, acreage and buildings · 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.