EC Coal Navajo County
GreenfieldNavajo, Arizona · WECC
At a glance
EC Coal Navajo County is a greenfield datacenter candidate site in Navajo, Arizona, scoring 48.4/100 DC Readiness — 26th of 176 scored sites in the county. It sits in the WECC grid region and the NAVAJO TRIBAL UTILITY AUTHORITY service territory, where interconnection has averaged 3.5 years from request to operation.
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 EC Coal Navajo County compare with other sites in Navajo?
EC Coal Navajo County ranks 26th of 176 scored candidate sites in Navajo. Its 48.4/100 is about 10% above the county average of 43.9. It is roughly in line with the Arizona average of 48.5 and roughly in line with 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 (45 vs 66). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is EC Coal Navajo County to power, fiber and other datacenters?
For connectivity, the nearest internet exchange facility is 2210Cortez LLC at 122 miles. 4 fiber providers report service at the location in FCC broadband data.
What are the flood, water and hazard risks at EC Coal Navajo County?
The site is in FEMA flood zone D, where flood risk has not been determined. WRI rates baseline water stress at 4.20 on a 0–5 scale. No mapped wetlands are recorded on the parcel. 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 |
EC Coal Navajo County: common questions
What is the DC Readiness score of EC Coal Navajo County?
EC Coal Navajo County scores 48.4/100 on the GridCensus DC Readiness scale, rated fair. It ranks 26th of 176 scored sites in Navajo. The Navajo average is 43.9 and the Arizona average is 48.5.
Which electric utility serves EC Coal Navajo County?
NAVAJO TRIBAL UTILITY AUTHORITY (state) holds the retail service territory that contains the site.
What grid region is EC Coal Navajo County in?
EC Coal Navajo County is in the WECC region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
Is EC Coal Navajo County in a flood zone?
The site is in FEMA flood zone D, where flood risk has not been determined.
Who owns EC Coal Navajo County?
Parcel records list the owner as NAVAJO TRIBAL UTILITY AUTHORITY (private land).
How far is EC Coal Navajo County from an internet exchange?
The nearest internet exchange facility is 2210Cortez LLC, about 122 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, “EC Coal Navajo County, Navajo, AZ”, https://gridcensus.com/datacenter-sites/arizona/navajo/ec-coal-navajo-county-76898d6b (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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