Proposed Datacenters at 450 Broadway, Buchanan, NY, 10511

PlannedUnclassifiedSiteWestchester County, New York

10% profile completeness

7 claims from 1 sources

Current facility power

Not yet sourced

Planned capacity

Not yet sourced

Floor area

Not yet sourced

Buildings (planned)

Not yet sourced

Capital cost / investment

Not yet sourced

First operational

Not yet sourced

POWER & GRID

Time-to-power · verification · interconnection

Time to power

H1 2027 – H1 2029

Medium confidencewindow, not a prediction

Project verification

Documented development

System impact study documented by ISO/RTO queue.

Current stage

System impact study

Furthest stage with documented evidence

Utility · ISO

ConEd · NYISO

Substation: Buchanan 138kV Substation

Power reality

Announced

No record

Interconnection request

200 MW[1]

1 active load interconnection request(s): NYISO 1717

Contracted / approved

No record

Under construction

No record

Operational

No record

⚠ No recorded land acquisition found.

AI evidence brief

Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.

How the time-to-power window was estimated

Evidence used

Current stage: System impact study (furthest stage with documented evidence)[1]
Stated date: Requested in-service date (NYISO 1717): 2027-03[1]
Aggressive date: The stated date is earlier than typical for the documented stage.
Required: 200 MW

Assumptions

From “System impact study”, large loads have typically taken 1.5–3.5 more years to first power (editorial range; see Methodology).
Stated dates slip; the window allows up to 2 years past the stated date at this stage.
The window is a range of plausible outcomes under these assumptions, not a forecast. It moves as new filings, queue updates or imagery arrive.

Window: H1 2027 – H1 2029

Project verification

Development

Announcedimplied by a later stage
Land acquiredimplied by a later stage
Planning / zoningimplied by a later stage
Permittingimplied by a later stage

Grid interconnection

Interconnection applicationAug 7, 2024
ISO/RTO queue
- Aug 7, 2024 · NYISO load request 1717 (200 MW): Status 6 (SRIS/SIS approved); proposed initial backfeed: 03-2027[1]
- Sep 27, 2026 · Load interconnection request: 200 MW[1]
Feasibility study
ISO/RTO queue
- NYISO load request 1717 (200 MW): Status 6 (SRIS/SIS approved); proposed initial backfeed: 03-2027 (queue status as of 2026-09-27)[1]
System impact study
ISO/RTO queue
- NYISO load request 1717 (200 MW): Status 6 (SRIS/SIS approved); proposed initial backfeed: 03-2027 (queue status as of 2026-09-27)[1]
Facilities study
Interconnection agreement / service contract

Build & energization

Financing
Under construction
Energization
Operational

● documented · ◌ implied by a later stage · ○ no evidence found. Dates are those of the earliest dated evidence, which can be later than when a stage actually began. Evidence classes: ISO/RTO queue.

Grid path

facility
Proposed Datacenters at 450 Broadway, Buchanan, NY, 10511
→
substation
Buchanan 138kV Substation[1]
Queue POIConfirmed
Point of interconnection in NYISO load request 1717
→
transmission
138 kV[1]
Queue POILikely
Voltage at the requested point of interconnection (Buchanan 138kV Substation)
→
utility
ConEd[1]
Queue POILikely
Transmission owner on the interconnection request
→
ISO / RTO
NYISO[1]
Service territoryConfirmed

Substation capacity:: not published
Required upgrades:: not yet sourced
Congestion:: not yet sourced (no nodal price data)

Dashed boxes are based on proximity only and do not establish which asset serves the site.

Interconnection records

Queue	Relationship	Stage	MW req.	MW appr.	Queued	Expected in service	POI / TO	Source · as of
NYISO 1717 Proposed Datacenters at 450 Broadway, Buchanan, NY, 10511 · Holtec Decommissioning International (HDI)	This site's load request Confirmed Site record created from this queue entry.	System impact study Status 6 (SRIS/SIS approved); proposed initial backfeed: 03-2027	200	—	Aug 7, 2024	Mar 2027	Buchanan 138kV Substation TO: ConEd	[1] Sep 27, 2026

On-site & dedicated generation

No on-site, behind-the-meter or dedicated generation found in sources.

Location & imagery

County-level (approximate)

Location is approximate (county-level (approximate)); the marker does not identify the exact site.

Coordinates: 41.16175, -73.75642
County: Westchester County

Photographs

No openly licensed ground-level photos matched to this site yet.

Ownership, operation & customers

1. Property owner of record
Not identified
2. Owner / developer
Holtec Decommissioning International (HDI)(unreviewed)[1]Likely
3. Operator
Not identified
4. Tenant / cloud
Not identified
5. End customer / workload
Not identified

Power supply

Not identified

Each link is sourced separately. The property owner of record is often a special-purpose entity; the same company appearing in two roles is shown only when sources say so.

All parties with evidence

Developer: Holtec Decommissioning International (HDI)(unreviewed)[1]Likely
Interconnection customer on the load request.

No tenants or end users identified in our sources yet.

Power (all fields)

Current facility power: Not yet sourced
Planned capacity: Not yet sourced

Capacity figures are nameplate or contracted; annual consumption is a labeled model estimate, not metered data.

Grid & electricity

ISO / RTO: NYISO[1]Confirmed
The request is in this ISO's queue.
Interconnection status: NYISO load request 1717: 200 MW, in study at Buchanan 138kV Substation[1]Confirmed
Load interconnection request: 200 MW[1]Confirmed
NYISO load interconnection request 1717 (Data center).
Contracted / committed power: Not yet sourced

Utility, ISO and nearby assets are derived from the site's location. Proximity to a substation or line doesn't establish the interconnection; that needs a utility filing or interconnection-queue record. Queue requests are applications, not commitments — most never reach operation.

Construction & permitting

Announced
—
Land acquired
—
Permitting
Aug 7, 2024[1]
Construction start
—
First operational
Mar 2027[1]
Projected
Expected completion
—

Real estate

Official assessments

Assessor's value for a tax year

None sourced yet

Recorded transactions

Sale prices from recorded deeds

None sourced yet

Model estimates

Our model — not an appraisal

None sourced yet

Annual property tax: Not yet sourced

No county parcel or assessor records linked yet. County records are currently ingested for Loudoun County, VA and Maricopa County, AZ.

Size

Floor area: Not yet sourced

What changed (last 3 years)

Follow this facility (RSS)

No tracked changes yet. Values are recorded on every data refresh, so changes will appear here over time.

Timeline

Aug 7, 2024[1]
NYISO load interconnection request 1717 filed (200 MW).
Mar 2027Projected[1]
Proposed initial backfeed / in-service for NYISO load request 1717.

All claims (provenance audit)

Field	Value	Source	Confidence	As of	Status
Name	Proposed Datacenters at 450 Broadway, Buchanan, NY, 10511	[1]	Confirmed	2026-09-27	Shown
Status	Planned	[1] derived	Confirmed	2026-09-27	Shown
Facility type	Unclassified	[1] derived	Confirmed	2026-09-27	Shown
Developer	Holtec Decommissioning International (HDI)	[1]	Likely	2026-09-27	Shown
ISO / RTO	NYISO	[1]	Confirmed	2026-09-27	Shown
Interconnection status	NYISO load request 1717: 200 MW, in study at Buchanan 138kV SubstationStatus 6 (SRIS/SIS approved); proposed initial backfeed: 03-2027 · requested 202	[1]	Confirmed	2026-09-27	Shown
Load interconnection request	200 MW	[1]	Confirmed	2026-09-27	Shown