TAP310894
SubstationArizona · GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED
At a glance
TAP310894 is an electric transmission substation in Arizona, on GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED's transmission network. It is classified as unclassified and connects 3 transmission lines. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #313966 | 230 kV | GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED | IN SERVICE | 9.9 mi |
| #313968 | 230 kV | GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPOR | IN SERVICE | 28.2 mi |
| #313965 | 69 kV | GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED | IN SERVICE | 3.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP310894, 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 |
|---|---|---|---|---|---|---|---|
| DOS CONDADOS | Substation-Adjacent | AZ | Graham County | 230 kV | 300 MW | 3.5 yrs | 55.5 |
| RED TAIL | Substation-Adjacent | AZ | Cochise County | 230 kV | 300 MW | 3.5 yrs | 55.5 |
| HACKBERRY | Substation-Adjacent | AZ | Graham County | 230 kV | 300 MW | 3.5 yrs | 55.2 |
| EC FFE Graham County | Greenfield | AZ | Graham County | — | — | 3.5 yrs | 53.7 |
| UNKNOWN309814 | Substation-Adjacent | AZ | Greenlee County | 115 kV | 100 MW | 3.5 yrs | 51.0 |
| OZ Graham | Greenfield | AZ | Graham | — | — | 3.5 yrs | 50.4 |
| Greenfield (TAP306867 - None) | Greenfield | AZ | Graham County | 230 kV | 300 MW | 3.5 yrs | 49.5 |
| UNKNOWN300824 | Substation-Adjacent | AZ | Graham County | 69 kV | 50 MW | 3.5 yrs | 49.5 |
Who owns the transmission lines at TAP310894?
The 3 connected lines listed above are owned by GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED, GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPOR. Line voltages range from 69 kV to 230 kV. Their combined recorded length is about 41.6 miles.
How do candidate sites near TAP310894 score?
The 8 highest-scoring candidate sites within about 25 miles range from 50 to 56 on the 0–100 DC Readiness scale. They fall in Graham County, Cochise County, Greenlee County, Graham. 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
How many transmission lines connect to TAP310894 substation?
3 transmission lines terminate at or pass through TAP310894 in the HIFLD line data. The connected lines listed here run at 230 kV, 69 kV. Together the listed lines cover about 41.6 miles.
Who owns TAP310894 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP310894 belong to GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPORATED, and others to GRAHAM COUNTY ELECTRIC COOPERATIVE INCORPOR. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP310894 substation located?
TAP310894 is in Arizona at 32.6726, -109.7087. The datacenter candidate sites closest to it are in Graham County, Cochise County, Greenlee County.
Are there datacenter candidate sites near TAP310894 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP310894. The highest-scoring is DOS CONDADOS at 56/100. Across Arizona, the average DC Readiness score is 48.5.
More 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, “TAP310894 substation, Arizona”, https://gridcensus.com/substations/arizona/tap310894-1de654ec (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 TAP310894 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.