TWIN PEAKS
Substation-AdjacentPinal County, Arizona · WECC
At a glance
TWIN PEAKS is a substation-adjacent datacenter candidate site in Pinal County, Arizona, scoring 54.2/100 DC Readiness — 87th of 471 scored sites in the county. Its nearest substation is TWIN PEAKS (0 mi, 115 kV). It sits in the WECC grid region and the TUCSON ELECTRIC POWER 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 TWIN PEAKS compare with other sites in Pinal County?
TWIN PEAKS ranks 87th of 471 scored candidate sites in Pinal County. Its 54.2/100 is roughly in line with the county average of 49.5. It is about 12% above 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 (56 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 TWIN PEAKS to power, fiber and other datacenters?
The nearest mapped substation, TWIN PEAKS, is about 0 miles away and operates at 115 kV. For connectivity, the nearest internet exchange facility is Login Tucson at 16.2 miles. 15 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Login Tucson, 16.2 miles away.
What are the flood, water and hazard risks at TWIN PEAKS?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk). At the county level, FEMA's National Risk Index rates Pinal 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 Pinal County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| Copper Crossing Energy and Research Cent | Brownfield | 69 kV | 1,779 MW | 3.5 yrs | 69.5 |
| BROWNING | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 65.7 |
| SAGUARO | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 63.8 |
| ABEL | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 63.0 |
| DUKE | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 62.3 |
| TORTOLITA | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 62.0 |
| PINAL CENTRAL | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 61.4 |
| SCHRADER | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 60.8 |
TWIN PEAKS: common questions
What is the DC Readiness score of TWIN PEAKS?
TWIN PEAKS scores 54.2/100 on the GridCensus DC Readiness scale, rated fair. It ranks 87th of 471 scored sites in Pinal County. The Pinal County average is 49.5 and the Arizona average is 48.5.
What is the nearest substation to TWIN PEAKS?
The nearest mapped substation is TWIN PEAKS, about 0 miles away, at 115 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves TWIN PEAKS?
TUCSON ELECTRIC POWER CO (investor owned) holds the retail service territory that contains the site; its holding company is UNS ELECTRIC INCORPORATED.
What grid region is TWIN PEAKS in?
TWIN PEAKS is in the WECC region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
Is TWIN PEAKS in a flood zone?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk).
How far is TWIN PEAKS from an internet exchange?
The nearest internet exchange facility is Login Tucson, about 16.2 miles away; 15 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, “TWIN PEAKS, Pinal County, AZ”, https://gridcensus.com/datacenter-sites/arizona/pinal-county/twin-peaks-0df3b8e8 (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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