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Anthropic Lake Mariner

Operating + expandingAI campusCampusBarker, Niagara County, New York
80% profile completeness
38 claims from 10 sources
Current facility power
49 MW[1]
Likelyestimated
Planned capacity
441 MW[1]
Likelyestimated
Floor area
Not yet sourced
Buildings (planned)
3[1]
Likelyderived
Capital cost / investment
$1.6B[1]
Likelyestimated
First operational
May 31, 2026[1]
Likelyderived

POWER & GRID

Time-to-power · verification · interconnection
Time to power
Remaining capacity: H1 2027 – H2 2027
High confidencewindow, not a prediction
Project verification
Verified operating
Operation documented by satellite imagery.
Current stage
Operational
Furthest stage with documented evidence
Utility · ISO
Niagara Mohawk Power Corp. · NYISO
Substation: Kintigh 345kV Substation

Power reality

Announced
441 MW[1]
Research estimate of planned capacity (no company figure found)
Interconnection request
250 MW[2]
1 active load interconnection request(s): NYISO 1670
Contracted / approved
No record
Under construction
392 MW[1]
Building 2, Building 3 under construction (satellite-tracked phases)
Operational
49 MW[1]
Estimated from buildings observed operational
  • ⚠ No permit record linked to this site yet.
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: Operational (furthest stage with documented evidence)[1]
  • Stated date: Requested in-service date (NYISO 1670): 2027-02[2]
  • Aggressive date: The stated date is earlier than typical for the documented stage.
  • Required: 441 MW
Assumptions
  • From “Under construction”, large loads have typically taken 0.5–2 more years to first power (editorial range; see Methodology).
  • Stated dates slip; the window allows up to 0.75 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 – H2 2027

Project verification

Development
  1. Announcedimplied by a later stage
  2. Land acquiredimplied by a later stage
  3. Planning / zoningimplied by a later stage
  4. Permittingimplied by a later stage
Grid interconnection
  1. Interconnection applicationJan 23, 2024
    ISO/RTO queue
    • Jan 23, 2024 · NYISO load request 1670 (250 MW): Status 6 (SRIS/SIS approved); studies available: SIS; proposed initial backfeed: 02-2027[2]
    • Sep 27, 2026 · Load interconnection request: 250 MW[2]
  2. Feasibility study
    ISO/RTO queue
    • NYISO load request 1670 (250 MW): Status 6 (SRIS/SIS approved); studies available: SIS; proposed initial backfeed: 02-2027 (queue status as of 2026-09-27)[2]
  3. System impact study
    ISO/RTO queue
    • NYISO load request 1670 (250 MW): Status 6 (SRIS/SIS approved); studies available: SIS; proposed initial backfeed: 02-2027 (queue status as of 2026-09-27)[2]
  4. Facilities study
  5. Interconnection agreement / service contract
Build & energization
  1. Financing
  2. Under constructionJun 11, 2025
    Model estimate · Satellite imagery
    • Jun 11, 2025 · Reported status: under construction[1]
    • Jun 11, 2025 · Construction start[1]
    • Jun 11, 2025 · Land clearing begins for Building 1 (AKA CB3).[1]
    • May 31, 2026 · Reported status: expanding[1]
  3. EnergizationMay 31, 2026
    Satellite imagery
    • May 31, 2026 · Building 1 is operational. On February 26, Terawulf [stated](https://investors.terawulf.com/news-events/press-releases/detail/132/terawulf-reports-fourth-quarter-and-full-year-2025[1]
  4. OperationalMay 31, 2026
    Satellite imagery
    • May 31, 2026 · Building 1 is operational. On February 26, Terawulf [stated](https://investors.terawulf.com/news-events/press-releases/detail/132/terawulf-reports-fourth-quarter-and-full-year-2025[1]

● 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, Model estimate, Satellite imagery.

Grid path

  1. facility
    Anthropic Lake Mariner
  2. substation
    Kintigh 345kV Substation[2]
    Queue POILikely
    Point of interconnection in NYISO load request 1670
  3. transmission
    345 kV[2]
    Queue POILikely
    Voltage at the requested point of interconnection (Kintigh 345kV Substation)
  4. utility
    Niagara Mohawk Power Corp.[3]
    Service territoryLikely
    Retail service territory containing the site · Transmission owner (queue): NYSEG
  5. ISO / RTO
    NYISO[5]
    Service territoryLikely
    Balancing authority: NYIS
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

QueueRelationshipStageMW req.MW appr.QueuedExpected in servicePOI / TOSource · as of
NYISO 1670
Lake Mariner Data II · Lake Mariner Data LLC
This site's load request
Likely
Request name/customer shares “mariner” with this facility, in the same county.
System impact study
Status 6 (SRIS/SIS approved); studies available: SIS; proposed initial backfeed: 02-2027
250—Jan 23, 2024Feb 2027Kintigh 345kV Substation
TO: NYSEG
[2] Sep 27, 2026

On-site & dedicated generation

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

Location & imagery

Mapped outline
Coordinates
43.35873, -78.59833
Address
7725 Lake Rd, Barker, NY 14012[1]Likely
County
Niagara County
Photographs

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

Ownership, operation & customers

  1. 1. Property owner of record
    Not identified
  2. 2. Owner / developer
    AI XPV Platform[1]
    Lake Mariner Data LLC(unreviewed)[2]Likely
  3. 3. Operator
    Not identified
  4. 4. Tenant / cloud
    Not identified
  5. 5. End customer / workload
    Anthropic[1]Likely
Power supply
Utility:
Niagara Mohawk Power Corp.(unreviewed)[3]Unverified
Capital & construction
Investor:
Google[1]
Investor:
Blackstone[1]

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
Owner
Developer
Lake Mariner Data LLC(unreviewed)[2]Likely

Interconnection customer on the load request.

End user
Utility
Niagara Mohawk Power Corp.(unreviewed)[3]Unverified

Most likely retail provider among 2 overlapping service territories (largest retail sales; territory polygons are approximate). Also overlapping: New York State Elec & Gas Corp.

Investor
Google[1]Confirmed
Blackstone[1]Confirmed

Power (all fields)

Current facility power
49 MW[1]Likelyestimated

Estimated total facility power (IT plus cooling and overhead) at the latest observed milestone.

Current IT capacity
42 MW[1]Likelyestimated

Estimated IT load currently online, based on buildings observed operational.

Planned capacity
441 MW[1]Likelyestimated

Projected facility power at the last tracked milestone (2027-03-31); not necessarily full build-out.

Estimated annual consumption
300 GWh/yr[4]Speculativeestimated

49 MW × 8,760 h × 70% utilization.

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

Grid & electricity

ISO / RTO
NYISO[5]Likelyderived

Location falls inside this ISO/RTO footprint.

Balancing authority
NYIS[3]Likelyderived

Control area of the containing utility territory.

Interconnection status
NYISO load request 1670: 250 MW, in study at Kintigh 345kV Substation[2]Confirmed
Load interconnection request
250 MW[2]Confirmed

NYISO load interconnection request 1670 (Data center (AI)).

State avg. industrial price
10.81¢/kWh[6]Confirmed

New York statewide average, July 2026.

State avg. commercial price
24.18¢/kWh[6]Confirmed

New York statewide average, July 2026.

Generation within 50 km
3.16 GW[7]Confirmedderived

47 EIA-reported plants within 50 km.

Generation queued in county
225 MW[2]Confirmedderived

2 active generation interconnection requests in Niagara County: Solar 225 MW. Queued projects often don't get built.

Contracted / committed power
Not yet sourced
Nearby infrastructureTypeDistanceVoltage / capacitySource
Slayton Settlement Road Solar Csg · RPNY Solar 3, LLCPower plant (Solar)17.7 km7 MW[7]
Lockport Energy Associates LP · Lockport Energy Associates LPPower plant (Natural Gas)24.9 km219 MW[7]
Modern Innovative Energy LLC · Innovative Energy Systems IncPower plant (Biomass)35.3 km6 MW[7]
Model City Energy Facility · Model City Energy LLCPower plant (Biomass)35.3 km6 MW[7]
World Generation X · North American Energy ServicesPower plant (Natural Gas)40.3 km52 MW[7]
Lewiston Niagara · New York Power AuthorityPower plant (Pumped Storage)41.9 km240 MW[7]
Robert Moses Niagara · New York Power AuthorityPower plant (Hydroelectric)43 km2.44 GW[7]
Reworld Niagara I · Reworld Niagara I, LLCPower plant (Biomass)45 km36 MW[7]
Largest queued generation in this countyFuelQueue statusMWSource
Somerset SolarNYISO 1079 · Somerset Solar, LLCSolarIA signed · proposed 2028-06125 MW[2]
Bear Ridge SolarNYISO 0704 · Bear Ridge Solar, LLCSolarIA signed · proposed 2028-04100 MW[2]

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

  1. Announced
    —
  2. Land acquired
    —
  3. Permitting
    Jan 23, 2024[2]
  4. Construction start
    Jun 11, 2025[1]
  5. First operational
    May 31, 2026[1]
  6. Expected completion
    Mar 31, 2027[1]
    Projected
Planned capacity
441 MW[1]Likelyestimated

Projected facility power at the last tracked milestone (2027-03-31); not necessarily full build-out.

Buildings (planned)
3[1]Likelyderived

Count of building outlines traced on satellite imagery.

Buildings operational
1[1]Likelyestimated
PhaseStatusAdded MWCompleted / expectedSource
Building 1operational49 MWMay 31, 2026[1]
Building 2under construction196 MWOct 31, 2026 (projected)[1]
Building 3under construction196 MWMar 31, 2027 (projected)[1]

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

Capital cost / investment
$1.6B[1]Likelyestimated

Modeled total capital cost (2025 USD) of capacity currently operational, incl. compute hardware.

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

Compute

Chip types
TPU v7[1]Confirmed
Compute (H100-equivalents)
58,600[1]Likelyestimated

What changed (last 3 years)

Follow this facility (RSS)
  • Buildings operational
    0Jun 11, 2025[1]→1May 31, 2026[1]
  • Status
    Under constructionJun 11, 2025[1]→Operating + expandingMay 31, 2026[1]

Timeline

Construction start: Jun 11, 2025[1]
First operational: May 31, 2026[1]
  1. Jun 11, 2025[1]

    Land clearing begins for Building 1 (AKA CB3).

  2. Mar 2, 2026[1]

    Building 1 appears to have a complete shell and cooling equipment. Building 2 shell is still under construction, but 17 cooling units are already loaded on the roof. The outline of Building 3 is visible at the foundation.

  3. May 31, 202649 MW facility power· 1 buildings operational[1]

    Building 1 is operational. On February 26, Terawulf stated that CB3 was expected to be energized by mid-May 2026. A drone video commissioned from RAAD shows several cooling units operating on May 8. It's therefore likely that the building was fully operational around this date.

  4. Jul 23, 202649 MW facility power· 1 buildings operational[1]

    Building 1 looks complete, consistent with it going operational back in May. Building 2 is mostly complete, with the row of backup generators on the east side of the building still being installed. Building 3 shell is complete, with rooftop coolers midway through installation, and no neighboring generators installed/visible yet.

  5. Oct 31, 2026Projected245 MW facility power· 2 buildings operational[1]

    Building 2 (AKA CB4) is operational. On February 26, Terawulf stated that CB4 was expected to be energized by Q3 2026.

  6. Mar 31, 2027Projected441 MW facility power· 3 buildings operational[1]

    Building 3 (AKA CB5) is operational. On February 26, 2026, Terawulf stated that CB5 was expected to be energized by Q4 2026. However, based on the pace of Building 2, and comparisons to other projects like Stargate Abilene, we think this is optimistic. We expect a 3-month delay past the end of Q4 2026 to get to full operational capacity.

  7. Jan 23, 2024[2]

    NYISO load interconnection request 1670 filed (250 MW).

  8. Feb 2027Projected[2]

    Proposed initial backfeed / in-service for NYISO load request 1670.

All claims (provenance audit)

38
FieldValueSourceConfidenceAs ofStatus
NameAnthropic Lake Mariner[1] Likely2026-07-23Shown
StatusUnder construction[1] derivedLikely2025-06-11Superseded / alternative
StatusUnder construction[1] derivedLikely2026-03-02Superseded / alternative
StatusOperating + expanding[1] derivedLikely2026-05-31Superseded / alternative
StatusOperating + expanding[1] derivedLikely2026-07-23Shown
Facility typeAI campus[1] derivedLikely2026-07-23Shown
Address7725 Lake Rd, Barker, NY 14012[1] Likely2026-07-23Shown
OwnerAI XPV PlatformOwner: AI XPV Platform[1] Confirmed2026-07-23Shown
DeveloperLake Mariner Data LLC[2] Likely2026-09-27Shown
End usersAnthropicUsers: Anthropic[1] Likely2026-07-23Shown
UtilityNiagara Mohawk Power Corp.territory 13573: NIAGARA MOHAWK POWER CORP. (INVESTOR OWNED, NATIONAL GRID GROUP[3] derivedUnverified2022Shown
InvestorsGoogleInvestors: Google[1] Confirmed2026-07-23Shown
InvestorsBlackstoneInvestors: Blackstone[1] Confirmed2026-07-23Shown
Current facility power49 MW[1] estimatedLikely2026-07-23Shown
Current facility power49 MW[1] estimatedLikely2026-05-31Superseded / alternative
Current IT capacity42 MW[1] estimatedLikely2026-07-23Shown
Current IT capacity42 MW[1] estimatedLikely2026-05-31Superseded / alternative
Planned capacity441 MW[1] estimatedLikely2026-07-23Shown
Estimated annual consumption300 GWh/yr[4] estimatedSpeculative2026-09-29Shown
ISO / RTONYISONEW YORK INDEPENDENT SYSTEM OPERATOR[5] derivedLikely—Shown
Balancing authorityNYIS[3] derivedLikely—Shown
Interconnection statusNYISO load request 1670: 250 MW, in study at Kintigh 345kV SubstationStatus 6 (SRIS/SIS approved); studies available: SIS; proposed initial backfeed:[2] Confirmed2026-09-27Shown
Load interconnection request250 MW[2] Confirmed2026-09-27Shown
Generation queued in county225 MW[2] derivedConfirmed2026-09-27Shown
State avg. industrial price10.81¢/kWh[6] Confirmed2026-07Shown
State avg. commercial price24.18¢/kWh[6] Confirmed2026-07Shown
Generation within 50 km3.16 GW[7] derivedConfirmed202502Shown
Buildings (planned)3[1] derivedLikely2026-07-23Shown
Buildings operational1[1] estimatedLikely2026-07-23Shown
Buildings operational0[1] estimatedLikely2025-06-11Superseded / alternative
Buildings operational0[1] estimatedLikely2026-03-02Superseded / alternative
Buildings operational1[1] estimatedLikely2026-05-31Superseded / alternative
Capital cost / investment$1.6B[1] estimatedLikely2026-07-23Shown
Compute (H100-equivalents)58,600[1] estimatedLikely2026-07-23Shown
Chip typesTPU v7[1] Confirmed2026-07-23Shown
Construction startJun 11, 2025[1] derivedLikely2026-07-23Shown
First operationalMay 31, 2026[1] derivedLikely2026-07-23Shown
Expected completionMar 31, 2027[1] estimatedSpeculative2026-07-23Shown