HELIOSOpen AI Infrastructure Observatory
Static snapshot. This site serves two different things: 1,853 data centres reported by OpenStreetMap contributors nationwide, and 13 sites Helios infers from Arizona parcel records, exported on July 29, 2026. The first is a map of what has been recorded; the second is an argued hypothesis with an evidence chain. This is a point-in-time export, not a live view. See meta.json or the methodology.

AZ-CHANDLER-006

Chandler, Maricopa County, Arizona · enterprise data center Reported

Download evidence & provenance
0 No known developmentStage 7: Operational8 Expansion
Confidence (Id. / Stage)
67% / 63%
high
Site area
4.9
acres across 2 parcels
Evidence records
9
first signal 2021-03-22
Estimated load
6–24 MW
inferred from acreage — see the estimates panel
Summary. 2 parcel(s) totalling 4.9 acres near 2600 W GERMANN RD, Chandler. Title of record is held by H5 DATA CENTERS CHANDLER LLC. Helios has not established which organization, if any, operates or will operate a facility here.

Evidence timeline

10 chronological entries
  1. 22 Mar 2021
    Transmission filingExtracted

    ACC docket E-01933A-21-0099: 230 kV transmission line siting application. Filed by Salt River Project Agricultural Improvement and Power District on 2021-03-22. Helios ingested a recorded fixture, not a live scrape.

    Proposes rebuild and tap of a 230 kV circuit to serve projected large industrial load south of the Loop 202.
    Source: Arizona Corporation Commission eDocketView original evidenceRetrieved 2026-07-28sha256:0d9fd1cefbd1$.docket.filings[0]Extraction confidence 85%
  2. 22 Mar 2021
    Stage advanced to Operational

    Stage advanced from 0 (No known development) to 7 (Operational) at 63% confidence. Principal evidence: Assessor classifies property use as data centre; Backup-generator air permit; Assessor classifies property use as data centre.

    Unclassified → OperationalDetected 1954 days after the factConfidence at transition 63%
  3. 10 Mar 2025
    Shell entity ownershipInferred

    Title is held by H5 DATA CENTERS CHANDLER LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.

    OwnerName = H5 DATA CENTERS CHANDLER LLC
    Source: Maricopa County Assessor Parcel LayerView original evidenceRetrieved 2026-07-25sha256:77af6d6d43fe$.features[12].attributes.OwnerNameExtraction confidence 45%
  4. 10 Mar 2025
    Shell entity ownershipInferred

    Title is held by H5 DATA CENTERS CHANDLER LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.

    OwnerName = H5 DATA CENTERS CHANDLER LLC
    Source: Maricopa County Assessor Parcel LayerView original evidenceRetrieved 2026-07-25sha256:77af6d6d43fe$.features[11].attributes.OwnerNameExtraction confidence 45%
  5. 25 Jul 2026
    Dedicated substation proximityCalculatedStanding condition

    RS-27 tagged 69 kV lies 234 m from the site boundary, close enough for a dedicated connection to be practical. Proximity is a locational precondition, not evidence that this substation serves the site.

    name = RS-27; operator = unknown; max_voltage_kv = 69.0
    Source: OpenStreetMap Power Infrastructure (Overpass API)View original evidenceRetrieved 2026-07-25sha256:b780b9bfc5c6OSM elementExtraction confidence 88%
  6. 28 Jul 2026
    Backup generator air permitExtractedStanding condition

    EPA ECHO lists DIGITAL REALTY TRUST CHANDLER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, OTH, SIP.

    DIGITAL REALTY TRUST CHANDLER; NSPS, OTH, SIP
    Source: EPA ECHO Air Facility RecordsView original evidenceRetrieved 2026-07-25sha256:71c269ae37b2$.Results.Facilities[157]Extraction confidence 80%
  7. 28 Jul 2026
    Assessor data center classificationReportedStanding condition

    Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).

    PropertyUseDescription = DATA CENTERS
    Source: Maricopa County Assessor Parcel LayerView original evidenceRetrieved 2026-07-25sha256:77af6d6d43fe$.features[12].attributes.PropertyUseDescriptionExtraction confidence 95%
  8. 28 Jul 2026
    Backup generator air permitExtractedStanding condition

    EPA ECHO lists EAST VALLEY COLO EMERGENCY POWER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: Minor NSR; Emergency Generator.

    EAST VALLEY COLO EMERGENCY POWER; Minor NSR; Emergency Generator
    Source: EPA ECHO Air Facility RecordsView original evidenceRetrieved 2026-07-25sha256:ed532dd13219$.Results.Facilities[1]Extraction confidence 80%
  9. 28 Jul 2026
    Assessor data center classificationReportedStanding condition

    Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).

    PropertyUseDescription = DATA CENTERS
    Source: Maricopa County Assessor Parcel LayerView original evidenceRetrieved 2026-07-25sha256:77af6d6d43fe$.features[11].attributes.PropertyUseDescriptionExtraction confidence 95%
  10. 28 Jul 2026
    Backup generator air permitExtractedStanding condition

    EPA ECHO lists CYRUSONE - CHANDLER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, NSPSM, OTH.

    CYRUSONE - CHANDLER; NSPS, NSPSM, OTH
    Source: EPA ECHO Air Facility RecordsView original evidenceRetrieved 2026-07-25sha256:71c269ae37b2$.Results.Facilities[131]Extraction confidence 80%

Why Helios believes this

67% High
Confidence
63%
high
Supporting weight
+60.1
8 contributions
Countervailing weight
0.0
0 contributions
Evidence diversity
4
distinct kinds across 9 records
+19.00
Assessor classifies property use as data centre
Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).
base 20 × extraction confidence 0.95 × recency 1.00
+13.60
Backup-generator air permit
EPA ECHO lists DIGITAL REALTY TRUST CHANDLER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, OTH, SIP.
base 17 × extraction confidence 0.80 × recency 1.00
+9.50
Assessor classifies property use as data centre
Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507). (occurrence 2, weight reduced)
base 20 × extraction confidence 0.95 × recency 1.00
+6.80
Backup-generator air permit
EPA ECHO lists EAST VALLEY COLO EMERGENCY POWER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: Minor NSR; Emergency Generator. (occurrence 2, weight reduced)
base 17 × extraction confidence 0.80 × recency 1.00
+5.31
Transmission filing
ACC docket E-01933A-21-0099: 230 kV transmission line siting application. Filed by Salt River Project Agricultural Improvement and Power District on 2021-03-22. Helios ingested a recorded fixture, not a live scrape.
base 25 × extraction confidence 0.85 × recency 0.25
+3.40
Backup-generator air permit
EPA ECHO lists CYRUSONE - CHANDLER as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, NSPSM, OTH. (occurrence 3, weight reduced)
base 17 × extraction confidence 0.80 × recency 1.00
+1.67
Single-purpose entity holds title
Title is held by H5 DATA CENTERS CHANDLER LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.
base 6 × extraction confidence 0.45 × recency 0.62
+0.84
Single-purpose entity holds title
Title is held by H5 DATA CENTERS CHANDLER LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent. (occurrence 2, weight reduced)
base 6 × extraction confidence 0.45 × recency 0.62
+0.00
High-voltage substation in close proximity
RS-27 tagged 69 kV lies 234 m from the site boundary, close enough for a dedicated connection to be practical. Proximity is a locational precondition, not evidence that this substation serves the site.
base 0 × extraction confidence 0.88 × recency 1.00

Scored by helios-rule-based version 0.1.0 on 2026-07-28, using evidence available as of 2026-07-28. Weights are domain-reasoned starting points, not values fitted to outcomes; calibration is deferred until a historical backtest exists to calibrate against.

Location

Estimated demand

none of this is a filed figure
Power capacityInferred

11.9 MW

5.9plausible range23.7

Assembled acreage x assumed power density, adjusted for stage.

What this assumes

Power density is an industry assumption, not a property of this site. Helios does not know the building footprint, rack density or how much of the assembled land will be built on.

stage
7
total acres
4.9443
MW per acre low
1
MW per acre high
4
MW per acre likely
2
stage density multiplier
1.2
Cooling waterInferred

142,800 GPD

14,160plausible range568,800

Estimated power x assumed cooling water intensity.

What this assumes

Cooling type is not recorded in any source Helios ingests. A closed-loop or air-cooled design approaches zero water use; evaporative cooling can exceed a gallon per kWh. The band is wide because the practice is.

gal per kwh low
0.1
gal per kwh high
1
gal per kwh likely
0.5

Operator and ownership

Operator not established
H5 DATA CENTERS CHANDLER LLCLLCPossible single-purpose entity
  • pass-through legal form (LLC)

Helios records the entity of record only. Shell-company indicators are flags for human review and do not constitute an attribution to any parent.

Parcels

APNAddressAcresDeed
303-25-776B2600 W GERMANN RD3.592025-03-10
303-25-776C2600 W GERMANN RD1.362025-03-10

Infrastructure dependencies

RS-27InferredLikely dedicated
234 m away · 69 kV · match confidence 88%
Jones SubstationInferredLikely dedicated
362 m away · 69 kV · Salt River Project · match confidence 84%
230.0 kV circuitInferred
524 m away · 230 kV · SRP · match confidence 36%
SRP Knox - Henshaw PowerlinesInferred
529 m away · 230 kV · SRP · match confidence 36%
230.0 kV circuitInferred
537 m away · 230 kV · SRP · match confidence 35%
SRP Knox - Henshaw PowerlinesInferred
537 m away · 230 kV · SRP · match confidence 35%

10 further dependencies not shown.

Dependencies are inferred from spatial proximity. A nearby substation makes a connection practical; it is not evidence that one exists.

Attribution

  • Parcel data courtesy of Maricopa County Assessor / Maricopa County GIS.
  • Power infrastructure data (c) OpenStreetMap contributors, ODbL.

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