TAP310551
SubstationArizona · ARIZONA PUBLIC SERVICE COMPANY
At a glance
TAP310551 is an electric transmission substation in Arizona, on ARIZONA PUBLIC SERVICE COMPANY'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 |
|---|---|---|---|---|
| #303433 | — | ARIZONA PUBLIC SERVICE COMPANY | IN SERVICE | 17.9 mi |
| #303701 | — | ARIZONA PUBLIC SERVICE COMPANY | IN SERVICE | 12.8 mi |
| #305510 | — | ARIZONA PUBLIC SERVICE COMPANY | IN SERVICE | 32.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP310551, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN305616 | Substation-Adjacent | AZ | La Paz County | 500 kV | 1,000 MW | 3.5 yrs | 58.6 |
| BLM Solar DLA: Brenda | Greenfield | AZ | La Paz County | — | 808 MW | 3.5 yrs | 55.7 |
| HARCUVAR | Substation-Adjacent | AZ | La Paz County | 230 kV | 300 MW | 3.5 yrs | 54.3 |
| EC FFE La Paz County | Greenfield | AZ | La Paz County | — | — | 3.5 yrs | 51.4 |
| UNKNOWN306568 | Substation-Adjacent | AZ | La Paz County | 115 kV | 100 MW | 3.5 yrs | 50.5 |
| Central Arizona Project | Federal Excess | AZ | La Paz County | — | — | 3.5 yrs | 44.8 |
| Parker-Davis Project | Federal Excess | AZ | La Paz County | — | — | 3.5 yrs | 44.7 |
| Central Arizona Project | Federal Excess | AZ | La Paz County | — | — | 3.5 yrs | 44.5 |
Who owns the transmission lines at TAP310551?
The 3 connected lines listed above are owned by ARIZONA PUBLIC SERVICE COMPANY. Their combined recorded length is about 63.2 miles.
How do candidate sites near TAP310551 score?
The 8 highest-scoring candidate sites within about 25 miles range from 45 to 59 on the 0–100 DC Readiness scale. They fall in La Paz 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
How many transmission lines connect to TAP310551 substation?
3 transmission lines terminate at or pass through TAP310551 in the HIFLD line data. Together the listed lines cover about 63.2 miles.
Who owns TAP310551 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP310551 belong to ARIZONA PUBLIC SERVICE COMPANY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP310551 substation located?
TAP310551 is in Arizona at 33.7493, -113.7662. The datacenter candidate sites closest to it are in La Paz County.
Are there datacenter candidate sites near TAP310551 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP310551. The highest-scoring is UNKNOWN305616 at 59/100. 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, “TAP310551 substation, Arizona”, https://gridcensus.com/substations/arizona/tap310551-de57d4ae (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 TAP310551 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.