DC
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MARA Data Center

OperatingUnclassifiedBuildingGranbury, Hood County, Texas
30% profile completeness
16 claims from 6 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
Operating (community-mapped, unverified)
Low confidence
Project verification
Unverified
Evidence is limited to community map.
Current stage
Operational
Furthest stage with documented evidence
Utility · ISO
Tri-County Electric Coop, INC (Tx) · ERCOT
Substation: Wolf Hollow Substation (345 kV) (nearest, unverified)

Power reality

Announced
No record
Interconnection request
No record
Contracted / approved
No record
Under construction
No record
Operational
No record
AI evidence brief
Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.

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 application
  2. Feasibility study
  3. System impact study
  4. Facilities study
  5. Interconnection agreement / service contract
Build & energization
  1. Financing
  2. Under constructionimplied by a later stage
  3. Energizationimplied by a later stage
  4. OperationalSep 27, 2026
    Community map
    • Sep 27, 2026 · Reported status: operating[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: Community map.

Grid path

  1. facility
    MARA Data Center
  2. substation
    Wolf Hollow Substation (345 kV)[1]
    Proximity onlyUnverified
    Nearest mapped substation, 0.52 km away. Proximity does not establish that it serves the site.
  3. transmission
    345 kV line[1]
    Proximity onlyUnverified
    Highest-voltage line mapped within 2 km (0.3 km away). Not confirmed as the supply path.
  4. utility
    Tri-County Electric Coop, INC (Tx)[2]
    Service territoryLikely
    Retail service territory containing the site
  5. ISO / RTO
    ERCOT[3]
    Service territoryLikely
    Balancing authority: ERCO
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

No interconnection-queue record is linked to this site. Of the ISOs we ingest, only NYISO publishes large-load requests; PJM, ERCOT, MISO, SPP and CAISO queues list generation only.

On-site & dedicated generation

  • Wolf Hollow II (Natural Gas, 1103 MW) is 0.6 km away[6]
    EIA plant within 1.5 km; proximity does not establish that it supplies the facility
    Natural gasCo-located1.1 GWUnverified
  • Wolf Hollow I LP (Natural Gas, 756 MW) is 0.9 km away[6]
    EIA plant within 1.5 km; proximity does not establish that it supplies the facility
    Natural gasCo-located756 MWUnverified

Location & imagery

Mapped outline
Coordinates
32.34232, -97.73124
Address
2001 Mitchell Bend Highway, Granbury, TX[1]Likely
County
Hood 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
    Not identified
  3. 3. Operator
    Marathon Digital Holdings(unreviewed)[1]Likely
  4. 4. Tenant / cloud
    Not identified
  5. 5. End customer / workload
    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
Operator
Utility
Tri-County Electric Coop, INC (Tx)(unreviewed)[2]Unverified

Most likely retail provider among 4 overlapping service territories (largest retail sales; territory polygons are approximate). Also overlapping: United Electric Coop Service INC - (Tx), Texas-New Mexico Power CO, Oncor Electric Delivery Company LLC.

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
ERCOT[3]Likelyderived

Location falls inside this ISO/RTO footprint.

Balancing authority
ERCO[2]Likelyderived

Control area of the containing utility territory.

Nearest mapped substation
Wolf Hollow Substation (345 kV)[1]Likelyderived

Nearest substation mapped in OpenStreetMap; proximity does not establish which substation serves the site.

Distance to substation
0.5 km[1]Likelyderived
Highest-voltage line nearby
345 kV[1]Likelyderived

Highest-voltage transmission line mapped within 2 km.

State avg. industrial price
7.07¢/kWh[5]Confirmed

Texas statewide average, July 2026.

State avg. commercial price
8.47¢/kWh[5]Confirmed

Texas statewide average, July 2026.

Generation within 50 km
5.1 GW[6]Confirmedderived

12 EIA-reported plants within 50 km.

Generation queued in county
761 MW[4]Confirmedderived

4 active generation interconnection requests in Hood County: Storage 307 MW, Gas 306 MW, Solar 148 MW. Queued projects often don't get built.

Interconnection status
Not yet sourced
Contracted / committed power
Not yet sourced
Nearby infrastructureTypeDistanceVoltage / capacitySource
138 kV lineTransmission line0.27 km138 kV[1]
345 kV lineTransmission line0.3 km345 kV[1]
Wolf Hollow II · Constellation Power, IncPower plant (Natural Gas)0.6 km1.1 GW[6]
Wolf Hollow I LP · Wolf Hollow I Power, LLCPower plant (Natural Gas)0.9 km756 MW[6]
Comanche Peak · Luminant Generation Company LLCPower plant (Nuclear)7.1 km2.4 GW[6]
Decordova Steam Electric Station · Luminant Generation Company LLCPower plant (Natural Gas)7.3 km534 MW[6]
Walnut Springs Solar · Cypress Creek RenewablesPower plant (Solar)29.5 km5 MW[6]
Johnson County · Johnson County Power LLCPower plant (Natural Gas)31 km267 MW[6]
Tpe Erath Solar, LLC · Navisun LLCPower plant (Solar)45.6 km10 MW[6]
Tpe Whitney Solar, LLC · Cardinal RenewablesPower plant (Solar)48.4 km10 MW[6]
Wolf Hollow Substation · OncorSubstation0.52 km345 kV[1]
Wolf Hollow SubstationSubstation0.77 km345 kV[1]
Largest queued generation in this countyFuelQueue statusMWSource
Wolf Hollow IIIERCOT 24INR0567 · Wolf Hollow II Power LLCGasIn study · proposed 2027-05306 MW[4]
Apache Hill BESSERCOT 25INR0231 · APACHE HILL ENERGY CENTERStorageIA signed · proposed 2026-10201 MW[4]
Rain Lily Solar 1ERCOT 27INR0288 · Rain Lily Solar 1 LLCSolarIn study · proposed 2028-10148 MW[4]
Rain Lily Storage 1ERCOT 27INR0285 · Rain Lily Storage One, LLCStorageIn study · proposed 2028-10106 MW[4]

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
    —
  4. Construction start
    —
  5. First operational
    —
  6. 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

Site area
40.7 acres[1]Likelyderived

Area of the mapped OSM site outline.

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

No dated events sourced yet.

All claims (provenance audit)

16
FieldValueSourceConfidenceAs ofStatus
NameMARA Data Centerway/1301559332 name=MARA Data Center[1] Likely2026-09-27Shown
StatusOperating[1] derivedUnverified2026-09-27Shown
Websitehttps://www.maragranbury.com/[1] Likely2026-09-27Shown
Address2001 Mitchell Bend Highway, Granbury, TX[1] Likely2026-09-27Shown
OperatorMarathon Digital Holdingsoperator=Marathon Digital Holdings[1] Likely2026-09-27Shown
UtilityTri-County Electric Coop, INC (Tx)territory 19159: TRI-COUNTY ELECTRIC COOP, INC (TX) (COOPERATIVE, TRI-COUNTY ELE[2] derivedUnverified2022Shown
ISO / RTOERCOTELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.[3] derivedLikely—Shown
Balancing authorityERCO[2] derivedLikely—Shown
Nearest mapped substationWolf Hollow Substation (345 kV)way/862801075[1] derivedLikely2026-09-28Shown
Distance to substation0.5 km[1] derivedLikely2026-09-28Shown
Highest-voltage line nearby345 kV[1] derivedLikely2026-09-28Shown
Generation queued in county761 MW[4] derivedConfirmed2026-09-01Shown
State avg. industrial price7.07¢/kWh[5] Confirmed2026-07Shown
State avg. commercial price8.47¢/kWh[5] Confirmed2026-07Shown
Generation within 50 km5.1 GW[6] derivedConfirmed202502Shown
Site area40.7 acres[1] derivedLikely2026-09-27Shown