Greenfield (UNKNOWN305880 - None)
GreenfieldNavajo, Arizona · WECC
At a glance
Greenfield (UNKNOWN305880 - None) is a greenfield datacenter candidate site in Navajo, Arizona, scoring 43.7/100 DC Readiness — 56th of 176 scored sites in the county. Its nearest substation is UNKNOWN305880. It sits in the WECC grid region and the ARIZONA PUBLIC SERVICE CO service territory, where interconnection has averaged 3.5 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
Sales-tax exemption suspended Jul 2026–Jun 2029; water constraints add scrutiny.
Incentive detail: Government Property Lease Excise Tax (GPLET) for qualified facilities on government land.
Site location
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How does Greenfield (UNKNOWN305880 - None) compare with other sites in Navajo?
Greenfield (UNKNOWN305880 - None) ranks 56th of 176 scored candidate sites in Navajo. Its 43.7/100 is roughly in line with the county average of 43.9. It is roughly in line with the Arizona average of 48.5 and about 18% below the national average of 53.2.
Against the Arizona average, its strongest sub-score is natural hazard (78 vs 77) and its weakest is fiber connectivity (51 vs 66). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (UNKNOWN305880 - None) to power, fiber and other datacenters?
The nearest mapped substation, UNKNOWN305880, is the closest grid connection point on record and operates at 138 kV. For connectivity, the nearest internet exchange facility is Iron Mountain Data Center - Scottsdale (AZS-1) at 119.9 miles. 4 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Iron Mountain Data Centers AZS-1, 120 miles away.
What are the flood, water and hazard risks at Greenfield (UNKNOWN305880 - None)?
At the county level, FEMA's National Risk Index rates Navajo "Relatively Low".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Navajo, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| CHOLLA | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 62.5 |
| SUGARLOAF | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 58.3 |
| UNKNOWN300020 | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 55.9 |
| EC Near Cholla | Greenfield | — | — | 3.5 yrs | 53.8 |
| EC Coal Navajo County | Greenfield | — | — | 3.5 yrs | 53.5 |
| LEUPP | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 53.4 |
| EC Near Cholla | Greenfield | — | — | 3.5 yrs | 53.2 |
| EC Near Cholla | Greenfield | — | — | 3.5 yrs | 52.9 |
Greenfield (UNKNOWN305880 - None): common questions
What is the DC Readiness score of Greenfield (UNKNOWN305880 - None)?
Greenfield (UNKNOWN305880 - None) scores 43.7/100 on the GridCensus DC Readiness scale, rated fair. It ranks 56th of 176 scored sites in Navajo. The Navajo average is 43.9 and the Arizona average is 48.5.
What is the nearest substation to Greenfield (UNKNOWN305880 - None)?
The nearest mapped substation is UNKNOWN305880, at 138 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (UNKNOWN305880 - None)?
ARIZONA PUBLIC SERVICE CO (investor owned) holds the retail service territory that contains the site; its holding company is ARIZONA PUBLIC SERVICE COMPANY.
What grid region is Greenfield (UNKNOWN305880 - None) in?
Greenfield (UNKNOWN305880 - None) is in the WECC region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is Greenfield (UNKNOWN305880 - None) from an internet exchange?
The nearest internet exchange facility is Iron Mountain Data Center - Scottsdale (AZS-1), about 119.9 miles away; 4 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Greenfield (UNKNOWN305880 - None), Navajo, AZ”, https://gridcensus.com/datacenter-sites/arizona/navajo/greenfield-unknown305880-none-31b85f70 (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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