UNISOURCE SQ HI
Substation-AdjacentMohave County, Arizona · WECC
At a glance
UNISOURCE SQ HI is a substation-adjacent datacenter candidate site in Mohave County, Arizona, scoring 49.6/100 DC Readiness — 34th of 275 scored sites in the county. Its nearest substation is UNISOURCE SQ HI (0 mi, 69 kV). It sits in the WECC grid region and the UNS ELECTRIC, INC service territory, where interconnection has averaged 3.5 years from request to operation. GridCensus catalogs 50 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
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 UNISOURCE SQ HI compare with other sites in Mohave County?
UNISOURCE SQ HI ranks 34th of 275 scored candidate sites in Mohave County. Its 49.6/100 is roughly in line with the county average of 46.8. 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 power availability (46 vs 34) and its weakest is water (16 vs 17). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is UNISOURCE SQ HI to power, fiber and other datacenters?
The nearest mapped substation, UNISOURCE SQ HI, is about 0 miles away and operates at 69 kV. For connectivity, the nearest internet exchange facility is EdgeConneX Las Vegas (EDCLAS01) at 79.2 miles. 10 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Google, 74.1 miles away.
What are the flood, water and hazard risks at UNISOURCE SQ HI?
At the county level, FEMA's National Risk Index rates Mohave County "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 Mohave County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN301539 | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 63.6 |
| EC Coal Mohave County | Greenfield | — | — | 3.5 yrs | 58.8 |
| EC Coal Mohave County | Greenfield | — | — | 3.5 yrs | 58.6 |
| PEACOCK | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 57.7 |
| MCCONNICO | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.5 |
| GRIFFITH | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.5 |
| UNKNOWN310988 | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.4 |
| DAVIS | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 56.4 |
UNISOURCE SQ HI: common questions
What is the DC Readiness score of UNISOURCE SQ HI?
UNISOURCE SQ HI scores 49.6/100 on the GridCensus DC Readiness scale, rated fair. It ranks 34th of 275 scored sites in Mohave County. The Mohave County average is 46.8 and the Arizona average is 48.5.
What is the nearest substation to UNISOURCE SQ HI?
The nearest mapped substation is UNISOURCE SQ HI, about 0 miles away, at 69 kV. GridCensus catalogs 50 MW of candidate capacity for the site.
Which electric utility serves UNISOURCE SQ HI?
UNS ELECTRIC, INC (investor owned) holds the retail service territory that contains the site; its holding company is UNS ELECTRIC INCORPORATED.
What grid region is UNISOURCE SQ HI in?
UNISOURCE SQ HI is in the WECC region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is UNISOURCE SQ HI from an internet exchange?
The nearest internet exchange facility is EdgeConneX Las Vegas (EDCLAS01), about 79.2 miles away; 10 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, “UNISOURCE SQ HI, Mohave County, AZ”, https://gridcensus.com/datacenter-sites/arizona/mohave-county/unisource-sq-hi-c6d3cdeb (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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