FORT HUACHUCA
SubstationArizona
At a glance
FORT HUACHUCA is an electric transmission substation in Arizona. It is classified as sub-transmission (138 kv) and connects 1 transmission line. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership
No owner is recorded for the lines that connect here.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #306496 | 138 kV | — | IN SERVICE | 52.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of FORT HUACHUCA, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| OZ Cochise | Greenfield | AZ | Cochise | — | — | 3.5 yrs | 59.0 |
| OZ Cochise | Greenfield | AZ | Cochise | — | — | 3.5 yrs | 56.9 |
| SAN RAFAEL | Substation-Adjacent | AZ | Cochise County | 230 kV | 300 MW | 3.5 yrs | 55.2 |
| UNKNOWN302780 | Substation-Adjacent | AZ | Cochise County | 115 kV | 100 MW | 3.5 yrs | 51.1 |
| FORT HUACHUCA | Substation-Adjacent | AZ | Santa Cruz County | 138 kV | 100 MW | 3.5 yrs | 50.7 |
| KARTCHNER | Substation-Adjacent | AZ | Santa Cruz County | 115 kV | 100 MW | 3.5 yrs | 50.5 |
| RAMSEY | Substation-Adjacent | AZ | Santa Cruz County | 115 kV | 100 MW | 3.5 yrs | 49.8 |
| Apache Powder Canopy | Brownfield | AZ | Cochise | 115 kV | 0 MW | 3.5 yrs | 49.4 |
How does FORT HUACHUCA compare with other substations in Arizona?
Arizona has 892 substation records in HIFLD, of which 466 carry a station name; the rest are unnamed tap points, risers and line ends. 87 named substations in the state are in FORT HUACHUCA's 115–229 kV band (19% of named stations). 138 sit in a higher band. 47 named substations in Arizona operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 69 kV.
How do candidate sites near FORT HUACHUCA score?
The 8 highest-scoring candidate sites within about 25 miles range from 49 to 59 on the 0–100 DC Readiness scale. They fall in Cochise, Cochise County, Santa Cruz County. The Arizona average across 3,816 scored sites is 48.5. 614 of those Arizona sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is FORT HUACHUCA substation?
FORT HUACHUCA has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so FORT HUACHUCA is above the national midpoint.
How many transmission lines connect to FORT HUACHUCA substation?
1 transmission line terminate at or pass through FORT HUACHUCA in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 52.1 miles.
Where is FORT HUACHUCA substation located?
FORT HUACHUCA is in Arizona at 31.5638, -110.3520. The datacenter candidate sites closest to it are in Cochise, Cochise County, Santa Cruz County.
Are there datacenter candidate sites near FORT HUACHUCA substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of FORT HUACHUCA. The highest-scoring is OZ Cochise at 59/100. Across Arizona, the average DC Readiness score is 48.5.
Other 138 kV substations in Arizona
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “FORT HUACHUCA substation, Arizona”, https://gridcensus.com/substations/arizona/fort-huachuca-996ab9e4 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for FORT HUACHUCA substation, Arizona is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.